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  1. Asked: March 4, 2023In: Biology

    Class 9 Science MCQ Questions of Natural Resources with Answers

    Best Answer
    Examgyani Team Gandalf

    Answer: 1.   The micro-organisms which help in formation of soil is         a. Bacteria         b. Moss         c. Lichen         d. B and c 2.   Burning of fossil fuels add         a. CO2, SO2, NO2, gases in air         b. C, SO2, N2, gases in the air         c. CO, SO3, NO3, gases in the air      Read more

    Answer:

    1.   The micro-organisms which help in formation of soil is
            a. Bacteria
            b. Moss
            c. Lichen
            d. B and c
    2.   Burning of fossil fuels add
            a. CO2, SO2, NO2, gases in air
            b. C, SO2, N2, gases in the air
            c. CO, SO3, NO3, gases in the air
            d. CH4, CO2, NO2, gases in the air
    3.   Greenhouse gases are
            a. Industries
            b. Rhizobium
            c. Lightening
            d. All of the above
    4.   Nitrogen fixation can be done by
            a. Industries
            b. Rhizobium
            c. Lightening
            d. All of the above
    5.   Atmosphere maintains the temperature of the earth because
            a. It contains water vapour
            b. It holds air, which is a bad conductor of heat
            c. It reflects the heat rays
            d. It absorbs the heat rays
    6.   Molecules of proteins contain
            a. Carbon
            b. Nitrogen
            c. Oxygen
            d. All of these
    7.   Life cannot sustain on Mars and Venus because the major component in the atmosphere is
            a. Oxygen
            b. Carbon dioxide
            c. Nitrogen
            d. Ozone
    8.   On the moon the temperature ranges from -190° C to 110° C. This is due to
            a. No water bodies present
            b. Water bodies present
            c. No bio geo chemical cycle
            d. No atmosphere
    9.   Depletion of ozone molecules in the stratosphere is due to
            a. Chlorine compound
            b. Fluorine compound
            c. Halogen compound
            d. None of these
    10.   The life-supporting zone of the earth is
            a. Lithosphere
            b. Hydrosphere
            c. Atmosphere
            d. Biosphere
    Answers
            1.   C
            2.   A
            3.   D
            4.   D
            5.   B
            6.   D
            7.   B
            8.   D
            9.   C
            10. D
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  2. Asked: March 5, 2023In: Biology

    All anesthetic agents depress respiration system except

    Best Answer
    Examgyani Team Gandalf

    Answer: Nitrous oxide can cause myocardial depression, but this effect is offset by the sympathetic increase leading to minimal hemodynamic changes. Volatile anaesthetic agents are not true respiratory depressant drugs in the sense that they decrease the respiratory rate seen by other agents.

    Answer:

    Nitrous oxide can cause myocardial depression, but this effect is offset by the sympathetic increase leading to minimal hemodynamic changes. Volatile anaesthetic agents are not true respiratory depressant drugs in the sense that they decrease the respiratory rate seen by other agents.

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  4. Asked: March 2, 2023In: Biology

    Class 9 Science MCQ Questions of Improvement in Food Resources with Answers

    Best Answer
    Examgyani Team Gandalf

    Answer: 1.  Using fertilizers in farming is an example of        I.  No cost production       II. Low-cost production      III. High-cost production      IV.  None of these 2.  Nitrogen, phosphorus and potassium are examples of        I.  Micro-nutrients       II.  Macro-nutrients      III.  FertiliRead more

    Answer:

    1.  Using fertilizers in farming is an example of
           I.  No cost production
          II. Low-cost production
         III. High-cost production
         IV.  None of these
    2.  Nitrogen, phosphorus and potassium are examples of
           I.  Micro-nutrients
          II.  Macro-nutrients
         III.  Fertilizers
         IV.  Both I and II
    3.  Cyperinus and Parthenium are types of
           I.  Diseases
          II.  Pesticides
         III.  Weeds
         IV.  Pathogens
    4.  Mullets, prawns, and mussels are examples of
           I.  Marine fishes
          II.  Fresh-water fishes
         III.  Finned fishes
         IV. Shellfish
    5.  What is the other name for Apis cerana indica?
           I.  Indian cow
          II.  Indian buffalo
         III.  Indian bee
         IV.  None of these
    6.  The management and production of fish are called
           I.  Pisciculture
          II.  Apiculture
         III.  Sericulture
         IV.  Aquaculture
    7.  Rohu and Catla are types of
           I.  Freshwater fish
          II.  Marine water fish
         III.  Both I and II
         IV.  None of these
    8.  Pasturage is related to
           I.  Cattle
          II.  Fishery
         III.  Apiculture
         IV.  Sericulture
    9.  What is the process of growing two or more crops in a definite pattern?
           I.  Crop rotation
          II.  Inter-cropping
         III.  Mixed cropping
         IV.  Organic cropping
    10.  Leghorn is related to
           I.  Apiculture
          II.  Dairy farming
         III.  Pisciculture
         IV.  Poultry
    ANSWERS
         1.    III
         2.    II
         3.    III
         4.    I
         5.    III
         6.    I
         7.    I
         8.    III
         9.    II
         10.  IV
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  5. Asked: March 2, 2023In: Biology

    Class 11 Biology MCQ Questions of Plant Kingdom with Answers

    Best Answer
    Examgyani Team Gandalf

    1. Which of the plant groups needs both land and water to complete their life cycle? Tracheophyta Pteridophyta Thallophyta Bryophyta 2. A plant that has seeds but no flowers and fruits? Bryophytes Gymnosperms Mosses Pteridophytes 3. Most primitive vascular plants? Mosses Cycads Kelps Ferns 4. PlantsRead more

    1. Which of the plant groups needs both land and water to complete their life cycle?
    1. Tracheophyta
    2. Pteridophyta
    3. Thallophyta
    4. Bryophyta
    2. A plant that has seeds but no flowers and fruits?
    1. Bryophytes
    2. Gymnosperms
    3. Mosses
    4. Pteridophytes
    3. Most primitive vascular plants?
    1. Mosses
    2. Cycads
    3. Kelps
    4. Ferns
    4. Plants that possess spores and embryo but lack vascular tissues and seeds?
    1. Rhodophyta
    2. Bryophyta
    3. Pteridophyta
    4. Phaeophyta
    5. Which one is not an exception in angiosperms?
    1. Double fertilization
    2. Secondary growth
    3. Presence of vessels
    4. Autotrophic nutrition
    6. Pteridophytes differ from mosses in
    1. Independent gametophyte
    2. Dependent gametophyte
    3. Flagellate antherozoids
    4. Independent and dominant sporophyte
    7. Angiosperms are the dominant flora because of
    1. Domestication by man
    2. Power of adapting in diverse habitats
    3. Self-pollination property
    4. Property of producing a large number of seeds
    8. Plants reproducing by spores are grouped under
    1. Bryophytes
    2. Sporophytes
    3. Cryptogams
    4. Thallophytes
    9. Plants having vascular tissue without seeds
    1. Angiosperm
    2. Pteridophytes
    3. Bryophytes
    4. Gymnosperms
    10. The plant group that posses the largest ovule, largest gametes, and largest tree
    1. Angiosperms
    2. Gymnosperms
    3. Pteridophytes
    4. Bryophytes
    11. Zygotic meiosis is the characteristic of
    1. Fucus
    2. Funaria
    3. Marchantia
    4. Chlamydomonas
    12. Pick the mismatched pair
    1. Cycas – Dioecious
    2. Equisetum – Homosporous
    3. Salvinia – Heterosporous
    4. Pinus – Dioecious
    13. A colonial alga is
    1. Volvox
    2. Chlorella
    3. Ulothrix
    4. Spirogyra
    14. Double fertilization is the characteristic of
    1. Algae
    2. Gymnosperms
    3. Fungi
    4. Angiosperms
    15. Conifers can tolerate extreme environments because of
    1. Presence of vessels
    2. Thick cuticle
    3. Superficial stomata
    4. Broad hardy leaves
    16. First plants to inhabit the land
    1. Angiosperms
    2. Bryophytes
    3. Gymnosperms
    4. Pteridophytes
    17. Agar is commercially obtained from
    1. Blue-green algae
    2. Red algae
    3. Brown algae
    4. Green algae
    18. Which one differs from Spirogyra based on its nucleus?
    1. Azygospore
    2. Zygospore
    3. Akinete
    4. Aplanospore
    19. The cell wall of Spirogyra contains
    1. Cellulose
    2. Chitin
    3. Lignin
    4. Suberin
    20. Which of the following completely lacks cell wall?
    1. Blue-green algae
    2. Saccharomyces
    3. Sea-fan
    4. Cyanobacteria

    21. Prothallus gives rise to sporophyte without fertilization. This is known as

    a. Apogamy

    b. Parthenocarpy

    c. Parthenogenesis

    d. Apospory

    22. Chromatophores participate in

    a. Photosynthesis

    b. Respiration

    c. growth

    d. Movement

    23. Which one is responsible for the formation of peat?

    a. Riccia

    b. Sphagnum

    c. Marchantia

    d. Funaria

    24. Isogamous condition with non-flagellated gametes is found in

    a. Chlamydomonas

    b. Volvox

    c. Spirogyra

    d. Fucus

    25. The exine of pollen grain comprises

    a. Pectin and cellulose

    b. Lignocellulose

    c. Pollenkit

    d. Sporopollenin

    26. Meiosis occurs in

    a. Conidia

    b. Meiocyte

    c. Megaspore

    d. Gemmule

    27. An evolutionary important character of Selaginella is

    a. Strobili

    b. Rhizophore

    c. Heterosporous nature

    d. Ligule

    28. Which is the common characteristic of multicellular fungi, filamentous algae and protonema of            mosses?

    a. Mode of nutrition

    b. Diplontic life cycle

    c. Multiplication by fragmentation

    d. Members of Plant Kingdom

    29. Vascular bundles are not found in

    a. Gymnosperms

    b. Pteridophytes

    c. Angiosperms

    d. Bryophytes

    30. The transport of male gametes in bryophytes and pteridophytes occurs through

    a. Wind

    b. Water

    c. Birds

    d. Insects

    Answer Key

    1- d 2- b 3- d 4- b 5- a 6- d 7- b 8- c 9- b 10- b
    11- d 12- d 13- a 14- d 15- b 16- b 17- b 18- b 19- a 20- c
    21- a 22- a 23- b 24- c 25- d 26- b 27- c 28- c 29- d 30- b
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  7. Asked: March 2, 2023In: Biology

    Class 11 Biology MCQ Questions of Cell Cycle and Cell Division with Answers

    Best Answer
    Examgyani Team Gandalf

    1. __________ and _________ coined the term “Meiosis”.   Van Burin and Hertwig Boveri and Stuka Walleye and Hofmeister Farmer and Moore   2. Chromatids coiling in the meiotic and mitotic division is _____   Plectonemic in both Paranemic in both Paranemic in mitosis and plectonemic inRead more

    1. __________ and _________ coined the term “Meiosis”.

     

        1. Van Burin and Hertwig
        2. Boveri and Stuka
        3. Walleye and Hofmeister
        4. Farmer and Moore

     

    2. Chromatids coiling in the meiotic and mitotic division is _____

     

        1. Plectonemic in both
        2. Paranemic in both
        3. Paranemic in mitosis and plectonemic in meiosis
        4. Plectonemic in mitosis and paranemic in meiosis

     

    3. When there is an increase in the condensation of chromatin during the process of cell division – 

     

        1. Heterochromatin increases
        2. Euchromatin increases
        3. Differentiation of euchromatin & heterochromatin decreases
        4. Differentiation of euchromatin & heterochromatin increases

     

    4. The condensation of chromosomes is observed in ______

     

        1. Prophase 1
        2. Anaphase 1
        3. Metaphase 1
        4. None of the above

    5. Nuclear DNA replicates in the ________ phase. 

        1. G2 phase
        2. M phase
        3. S phase
        4. None of the above

     

    6. _________ is a form of cell division which results in the creation of gametes or sex cells.

     

        1. Mitosis
        2. Meiosis
        3. Miosis
        4. None of the above

     

    7. ____ is the number of DNA in the chromosome at the G2 stage of the cell cycle

     

        1. 1
        2. 2
        3. 3
        4. 0

     

    8. The stage which serves as a connecting link between meiosis 1 and meiosis 2

     

        1. Interphase 2
        2. Interphase 1
        3. Interkineses
        4. None of the above

     

    9. The longest stage in the cell cycle is 

     

        1. Interphase
        2. Anaphase
        3. Metaphase
        4. None of the above

     

    10. The _______ state implies the exit of cells from the cell cycle

     

        1. S
        2. G1
        3. G2
        4. G0

     

    11. Synapsis is defined as the pairing of ________

     

        1. Acentric chromosomes
        2. Non-homologous chromosomes
        3. Any chromosomes
        4. Homologous chromosomes

     

    12. Mitosis can be observed in _____

     

        1. Polyploid individual
        2. Diploid individual
        3. Haploid individual
        4. Both (1,) (2) and (3)

     

    13. The spindle apparatus is formed during the ________ phase of mitosis.

     

        1. Telophase
        2. Metaphase
        3. Prophase
        4. Anaphase

     

    14. Cyclin is associated with ___________

     

        1. Leptospirosis 
        2. Glycolysis
        3. Cylosis
        4. Mitosis

     

    15. If an individual wants to view diakinesis, which of these would be

     

        1. Hair
        2. Leaf 
        3. Onion root 
        4. Flower bud

     

    16. Chromosome structure can be observed best during ____

     

      1. Anaphase
      2. Metaphase
      3. Prophase
      4. None of the above

    Answer Keys for Cell Cycle And Cell Division MCQ

     

    1 – 4 2 – 4 3 – 3 4 – 1
    5 – 3 6 – 2 7 – 2 8 – 3
    9 – 1 10 – 4  11 – 4 12 – 4
    13 – 2 14 – 4 15 – 4 16 – 2

     

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  8. Asked: March 1, 2023In: Biology

    Class 11 Biology MCQ Questions of The Living World

    Best Answer
    Examgyani Team Gandalf

    1. A group of plants and animals with similar traits of any rank is Taxon Species Genus Order 2. Which is less general in characters as compared to genus? Family Division Class Species 3. What is the correct sequence? Genus-species-order-kingdom Species-order-phylum-kingdom Species-genus-order-phyluRead more

    1. A group of plants and animals with similar traits of any rank is

    1. Taxon
    2. Species
    3. Genus
    4. Order

    2. Which is less general in characters as compared to genus?

    1. Family
    2. Division
    3. Class
    4. Species

    3. What is the correct sequence?

    1. Genus-species-order-kingdom
    2. Species-order-phylum-kingdom
    3. Species-genus-order-phylum
    4. Kingdom-phylum-class-order

    4. Metabolism refers to

    1. Release of energy
    2. Gain of energy
    3. Catabolism
    4. Gain or release of energy

    5. What is nomenclature?

    1. Genus name is written after species
    2. Genus and species names are written in italics
    3. Genus and species have the same name
    4. The first letter of genus and species name is capital

    6. The term phylum was coined by

    1. Linnaeus
    2. Cuvier
    3. Haeckel
    4. Theophrastus

    7. Binomial nomenclature was given by

    1. Linnaeus
    2. Hugo De Vries
    3. John Ray
    4. Huxley

    8. Species found in different geographical locations are called

    1. Sympatric species
    2. Allopatric species
    3. Sibling species
    4. Morphospecies

    9. What is a homonym?

    1. Identical name of two different taxa
    2. Two or more names of same taxon
    3. Name given to a taxon in local language
    4. Species name repeats the generic name

    10. The biologically cohesive unit of taxa is

    1. Phylum
    2. Order
    3. Genus
    4. Species

    11. The scientific name of mango is

    1. Mangifera indica
    2. Mangifera Indica
    3. Mangifera indica
    4. Mangifera Indica

    12. Nicotiana is a ————-

    1. Species
    2. Sub-species
    3. Genus
    4. Class

    13. Energy flow and energy transformation in a living system follow

    1. Biogenetic law
    2. Law of thermodynamics
    3. Law of limiting factor
    4. Liebig’s law of minimum

    14. Energy transformation is never 100% efficient because of

    1. Catabolism
    2. Entropy
    3. Homeostasis
    4. Anabolism

    15. The defining characteristic of living beings is

    1. They reproduce
    2. They can digest their food
    3. They respond to external stimuli
    4. They regenerate

    Answer key

    1- a 2- d 3- d 4- d 5- b 6- c 7- a 8- b
    9- a 10- d 11- c 12- c 13- b 14- b 15- c
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    • 112
  10. Asked: March 9, 2023In: Biology

    Class 11 Biology MCQ Questions of Structural Organisation in Animals

    Best Answer
    Examgyani Team Gandalf

    ________ is a merocrine gland Pineal Gland Sebaceous Gland Salivary Gland None of the above Antigens are typically found in Plasma Cell surface Nuclear membrane None of the above _________ is the enzyme need for muscle contraction. It is present in Myosin. Actin Trypsin ATPase None of the above TheRead more

    1. ________ is a merocrine gland
      1. Pineal Gland
      2. Sebaceous Gland
      3. Salivary Gland
      4. None of the above
    2. Antigens are typically found in
      1. Plasma
      2. Cell surface
      3. Nuclear membrane
      4. None of the above
    3. _________ is the enzyme need for muscle contraction. It is present in Myosin.
      1. Actin
      2. Trypsin
      3. ATPase
      4. None of the above
    4. The basement membrane is derived from ______________
      1. Myosin
      2. Pachyderm
      3. Endoderm
      4. Epidermis & connective tissue
    5. ________ are blood cells that transport oxygen through the bloodstream
      1. Leukocytes
      2. Erythrocytes
      3. Platelets
      4. None of the above
    6. The bone is a natural reservoir for _____
      1. Fluorine
      2. Water
      3. Calcium
      4. Iron
    7. The soft gelatinous tissue found inside bones is called
      1. Bone effusion
      2. Bone marrow
      3. Bone abscess
      4. None of the above
    8. Radiation does more damage to cancer cells when compared to normal cells because
      1. Cancer cells do not multiply often
      2. Cancer cells do not have access to nutrition
      3. Cancer cells have a weak cellular structure
      4. Cancer cells undergo rapid division
    9. __________ cells line the blood capillaries
      1. Alpha cells
      2. Endothelial Cells
      3. Oxyntic cells
      4. None of the above
    10. Antibodies are chemically _______________.
      1. Fats
      2. Foreign pathogens
      3. Actin
      4. Proteins
    Answer Keys for Structural Organisation in Animals MCQ
    Question Number Answer Key
    1 c
    2 b
    3 c
    4 d
    5 b
    6 c
    7 b
    8 d
    9 b
    10 d
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    • 112
  11. Asked: March 9, 2023In: Biology

    Class 9 Science MCQ Questions of Tissues with Answers

    Best Answer
    Examgyani Team Gandalf

    1. In desert plants, the rate of water loss gets reduced due to the presence of__________. (a) cuticle (b) stomata (c) lignin (d) suberin ► (a) cuticle   2. Which of the following tissues has dead cells? (a) Parenchyma (b) Sclerenchyma (c) Collenchyma (d) Epithelial tissue ► (b) SclerenchymaRead more

    1. In desert plants, the rate of water loss gets reduced due to the presence of__________.

    (a) cuticle

    (b) stomata

    (c) lignin

    (d) suberin

    ► (a) cuticle

     

    2. Which of the following tissues has dead cells?

    (a) Parenchyma

    (b) Sclerenchyma

    (c) Collenchyma

    (d) Epithelial tissue

    ► (b) Sclerenchyma

     

    3. Lignified or thickened cell wall is a characteristic feature of______.

    (a) Collenchyma

    (b) Sclerenchyma

    (c) Parenchyma

    (d) Phloem

    ► (b) Sclerenchyma

     

    4. Survival of plants in terrestrial environment has been made possible by the presence of

    (a) intercalary meristem    

    (b) conducting tissue

    (c) apical meristem

    (d) parenchymatous Tissue

    ► (b) conducting tissue

     

    5. Voluntary muscles are found in______.

    (a) Alimentary canal

    (b) Limbs

    (c) Iris of the eye

    (d) Bronchi of lungs

    ► (b) Limbs

     

    6. The kidney shaped cells surrounding stomata are called:

    (a) Chlorenchyma cells

    (b) Kidney cells

    (c) Arc cells

    (d) Guard cells

    ► (d) Guard cells

     

    7. The dead element present in the phloem is

    (a) companion ceils    

    (b) phloem fibres

    (c) phloem parenchyma    

    (d) sieve tubes

    ► (b) phloem fibres

     

    8. Major protein of connective tissue is:

    (a) Myosin

    (b) Melanin

    (c) Collagen

    (d) Keratin

    ► (c) Collagen

     

    9. Cork cells are made impervious to water and gases by the presence of_______.

    (a) cellulose    

    (b) lipids

    (c) suberin    

    (d) lignin

    ► (c) suberin    

     

    10. The plant tissue which provides mechanical strength and consists of living cells, is

    (a) parenchyma

    (b) aerenchyma

    (c) collenchyma

    (d) sclerenchyma

    ► (c) collenchyma

     

    11. Intestine absorbs the digested food materials. What type of epithelial cells are responsible for that?

    (a) Stratified squamous epithelium    

    (b) Columnar epithelium

    (c) Spindle fibres    

    (d) Cuboidal epithelium

    ► (b) Columnar epithelium

     

    12. Processes from osteoblasts are found in :

    (a) Lamella

    (b) Canaliculi

    (c) Dendrites

    (d) Haversian canals

    ► (b) Canaliculi

     

    13. Smooth muscle is found in all the sites except:

    (a) Gastrointestinal tract

    (b) Fallopian tube

    (c) Blood vessel

    (d) Eyeball muscle

    ► (d) Eyeball muscle

     

    14. Both collenchyma and sclerenchyma give mechanical strength to plants; but the former differs from the latter, in_______.

    (a) retaining the protoplasm at maturity

    (b) having uniformly thickened wall

    (c) having dead cells

    (d) both (a) and (b)

    ► (d) both (a) and (b)

     

    15. The mechanical strength and rigidity of cell wall is due to

    (a) cellulose

    (b) lignin

    (c) suberin

    (d) cutin

    ► (b) lignin

     

    16. The conducting cells of xylem are

    (a) tracheids and xylem fibres

    (b) vessels and xylem fibres

    (c) tracheids and vessels

    (d) vessels and sieve tube

    ► (c) tracheids and vessels

     

    17. In a neuron, dendrite may be one or many, but axon is generally:

    (a) One

    (b) Two

    (c) Three

    (d) More than one

    ► (a) One

     

    18. Which of the following does not signify striated muscle?

    (a) Visceral muscle

    (b) Voluntary muscle

    (c) Striped muscle

    (d) Skeletal muscle

    ► (a) Visceral muscle

     

    19. Which one of the following cellular components of the blood is responsible for the production of antibodies?

    (a) Thrombocyte

    (b) Lymphocyte

    (c) Monocyte

    (d) Erythrocyte

    ► (b) Lymphocyte

     

    20. Flexibility in plants is due to

    (a) collenchyma    

    (b) sclerenchyma

    (c) parenchyma

    (d) chlorenchyma

    ► (a) collenchyma    

     

    21. What does vascular bundle consist of?

    (a) Xylem and Parenchyma

    (b) Epidermis and Meristem

    (c) Epidermis and Cork

    (d) Xylem and Phloem

    ► (d) Xylem and Phloem

     

    22. Blood plasma is:

    (a) Neutral

    (b) Slightly acidic

    (c) Slightly alkaline

    (d) Strongly acidic

    ► (c) Slightly alkaline

     

    23. Chloroplasts occur in which of the following cells?

    (a) Collenchyma and Sclerenchyma

    (b) Parenchyma and Chlorenchyma

    (c) Chlorenchyma and Sieve tubes

    (d) Xylem parenchyma and Sclerenchyma

    ► (b) Parenchyma and Chlorenchyma

     

    24. Which body part is not composed of nervous tissue?

    (a) Muscles

    (b) Nerves

    (c) Brain

    (d) Spinal cord

    ► (a) Muscles

     

    25. The epidermis of desert plants has a thick waxy coating of:

    (a) Cork

    (b) Suberin

    (c) Cutin

    (d) Epithelial tissue

    ► (c) Cutin

     

    26. The contraction of muscle tissue is carried out by the action of

    (a) Actin and myosin

    (b) Actin and relaxin

    (c) Fibrin and relaxin

    (d) Secretin and myosin

    ► (a) Actin and myosin

     

    27. Branched involuntary muscle fibres are found in

    (a) limbs

    (b) ureters

    (c) heart

    (d) tongue

    ► (c) heart

     

    28. During a performance, if a dancer wants to stop her dancing, which muscles will execute this decision?

    (a) Striated

    (b) Smooth

    (c) Cardiac

    (d) Involuntary

    ► (a) Striated

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    • 112
  13. Asked: February 27, 2023In: Biology

    Class 11 Biology MCQ Questions of Biomolecules with Answers

    Best Answer
    Examgyani Team Gandalf

    1. Which biomolecule is distributed more widely in a cell? Chloroplast RNA DNA Spaherosomes 2. Which is a reducing sugar? Galactose Gluconic acid Sucrose β-methyl galactosidase 3. Most abundant RNA in the cell rRNA mRNA tRNA tRNA threonine 4. Name the simplest amino acid Alanine Tyrosine AsparagineRead more

    1. Which biomolecule is distributed more widely in a cell?

    1. Chloroplast
    2. RNA
    3. DNA
    4. Spaherosomes

    2. Which is a reducing sugar?

    1. Galactose
    2. Gluconic acid
    3. Sucrose
    4. β-methyl galactosidase

    3. Most abundant RNA in the cell

    1. rRNA
    2. mRNA
    3. tRNA
    4. tRNA threonine

    4. Name the simplest amino acid

    1. Alanine
    2. Tyrosine
    3. Asparagine
    4. Glycine

    5. Mineral associated with cytochrome is

    1. Mg
    2. Cu and Ag
    3. Fe
    4. Cu

    6. The most common secondary structure of proteins is

    1. β-pleated sheet
    2. β-pleated sheet parallel
    3. β-pleated sheet non-parallel
    4. α-helix

    7. The term enzyme was coined by

    1. Urey Miller
    2. Pasteur
    3. Kuhne
    4. Buchner

    8. β-oxidation occurs in

    1. Nucleus
    2. Cytoplasm
    3. Mitochondria
    4. Chloroplast

    9. Koshland’s theory of enzyme action is known as

    1. Lock and key theory
    2. Reduced fit theory
    3. Induced fit theory
    4. Enzyme coenzyme theory

    10. A high content of triglycerides are found in

    1. VLDL
    2. LDL
    3. HDL
    4. Chylomicrons

    11. Haemoglobin has

    1. Primary structure
    2. Secondary structure
    3. Tertiary structure
    4. Quaternary structure

    12. Which is the most abundant biomolecule on earth?

    1. Mineral salts
    2. Proteins
    3. Lipids
    4. Carbohydrates

    13. In which of the following an anticodon occurs

    1. tRNA
    2. mRNA
    3. rRNA
    4. DNA

    14. The fastest enzyme is

    1. DNA gyrase
    2. Pepsin
    3. DNA polymerase
    4. Carbonic anhydrase

    15. Which of the following is a phospholipid?

    1. Sterol
    2. Cholesterol
    3. Lecithin
    4. Steroid

    Answer Key

    1- b 2- a 3- a 4- d 5- c 6- d 7- c 8- c
    9- c 10- d 11- d 12- d 13- a 14- d 15- c
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    • 112
  14. Asked: February 27, 2023In: Biology

    Class 11 Biology MCQ Questions of Anatomy of Flowering Plants

    Best Answer
    Examgyani Team Gandalf

    Explore some important questions on this topic below. 1. Root hair develop from the region of a) Maturation b) Meristematic activity c) Root cap d) Elongation 2. Phloem in gymnosperms lacks a) Sieve tubes only b) Companion cells only c) Albuminous cells and sieve cells d) Both sieve tubes and companRead more

    Explore some important questions on this topic below.

    1. Root hair develop from the region of

    a) Maturation

    b) Meristematic activity

    c) Root cap

    d) Elongation

    2. Phloem in gymnosperms lacks

    a) Sieve tubes only

    b) Companion cells only

    c) Albuminous cells and sieve cells

    d) Both sieve tubes and companion cells

    3. The main water-conducting elements of xylem in gymnosperms are

    a) Tracheids

    b) Fibers

    c) Transfusion tissue

    d) Vessels

    4. Which of the following yields fibres?

    a) Sisso

    b) Teak

    c) Oak

    d) Coconut

    5. In a ring girdled plant

    a) The shoot dies first

    b) The root dies first

    c) Neither shoot nor root dies

    d) The root and shoot die together

    6. Casparian strips occur in

    a) Cortex

    b) Endodermis

    c) Epidermis

    d) Pericycle

    7. Gymnosperms are also called soft wood spermatophytes because they lack

    a) Xylem vessels

    b) Phloem fibres

    c) Cambium

    d) Thick-walled tracheids

    8. Palisade parenchyma is absent in leaves of

    a) Sorghum

    b) Soybean

    c) Gram

    d) Mustard

    9. Xylem translocates

    a) Water, mineral salts, some organic nitrogen and hormones

    b) Water, mineral salts and some organic nitrogen only

    c) Water and mineral salts only

    d) Water only

    10. The common bottle cork is a product of

    a) Xylem

    b) Phellogen

    c) Dermatogen

    d) Vascular cambium

    11. Which of these is composed of dead cells?

    a) Xylem parenchyma

    b) Phellem

    c) Phloem

    d) Collenchyma

    12. Tracheids differ from other tracheary elements in

    a) Being lignified

    b) Lacking nucleus

    c) Being imperforate

    d) Having Casparian strips

    13. Organization of stem apex into corpus and tunica is determined mainly by

    a) Rate of shoot tip-growth

    b) Rate of cell growth

    c) Regions of meristematic activity

    d) Planes of cell division

    14. Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of

    a) Xerophytes

    b) Epiphytes

    c) Mesophytes

    d) Hydrophytes

    15. At maturity, which of the following is enucleate?

    a) Cortical cell

    b) Companion cell

    c) Sieve cell

    d) Palisade cell

    16. Transmission tissue is a distinguishing feature of

    a) Hollow style

    b) Solid style

    c) Dry stigma

    d) Wet stigma

    17. Chlorenchyma is known to develop in the

    a) Spore capsule of a moss

    b) Mycelium of a green mould such as Aspergillus

    c) Cytoplasm of Chlorella

    d) Pollen tube of Pinus

    18. Regeneration of damaged growing grass following grazing is largely due to

    a) Intercalary meristem

    b) Lateral meristem

    c) Secondary meristem

    d) Apical meristem

    19. In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?

    a) Shoot tips and root tips

    b) Flowers, fruits and leaves

    c) Root and stem

    d) All parts

    20. Companion cells are closely related to

    a) Guard cells

    b) Trichomes

    c) Vessel elements

    d) Sieve elements

    Anatomy of Flowering Plants Answer Keys

    1(a)

    2(d)

    3(a)

    4(d)

    5(b)

    6(b)

    7(a)

    8(a)

    9(a)

    10(b)

    11(b)

    12(c)

    13(d)

    14(d)

    15(c)

    16(b)

    17(a)

    18(a)

    19(a)

    20(d)
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    • 112