Competitive Exams: Zoology MCQs (Practice-Test 71 of 112)

  1. Neopallium appeared for the first time in one group of vertebrates and reached a high level of development in another group of vertebrates. The two groups of vertebrates in question are respectively

    1. reptiles and birds

    2. amphibians and mammals

    3. birds and mammals

    4. reptiles and mammals

  2. Match List I with List II and select the correct answer

    List-I List-II
    1. Plantigrade

    2. Digitigrade

    3. Unguligrade

    1. Man

    2. Cow

    3. Bear

    4. Cat

    5. Dog

    6. Horse

    • A
    • B
    • C
    • D
    • E
    • F
      • 1
      • 2
      • 4
      • 5
      • 1
      • 6
      • 1
      • 3
      • 4
      • 5
      • 2
      • 6
      • 1
      • 3
      • 4
      • 2
      • 5
      • 6
      • 3
      • 4
      • 5
      • 1
      • 6
      • 2
  3. As compared to the pelvic limb, the pectoral limb is better suited to accommodate suspended weight because

    1. the pectoral limb bears body weight by a solid vertebral connection with the backbone

    2. the pectoral girdle and limb have no skeletal connection with the adult skeleton in all the vertebrates

    3. a group of muscles attach the shoulder blade to the trunk in a fanned manner radiating in all directions

    4. the ligaments of the shoulder joint are very highly developed and are good weight-bearing elements

  4. The immunological function of the body is controlled by

    1. albumins

    2. alpha globulins

    3. beta globulins

    4. gamma blobulins

  5. Succinate dehydrogenase is inhibited by malonate, oxalate and oxaloacelate. This is because they

    1. contain two anionic groups and bind to a site other than the active site of the enzyme

    2. are competitive inhibitors and bind to a site other than the active site of the enzyme

    3. are non-competitive inhibitors an. Bind to the active site of the enzyme

    4. contain two anionic groups and bind to the active sire of the enzyme

  6. Which of the following pairs is/are correctly matched? Enzyme: Action of the enzyme

      • Pepsin
      • Converts proteins into proteoses and peptones
      • Trypsin
      • Converts proteins into proteoses, peptones and polypeptides
      • Dipeptidases
      • Convert polypeptides into dipeptides

    Select the correct answer using the codes given below

    Codes:

    1. 1, 2 and 3

    2. 1 and 2

    3. 1 and 3

    4. 2 alone

  7. Molecules of ATP

    1. have identical chemical structures in all organisms

    2. are found in cells of primitive organisms only

    3. are responsible for passing genetic information to all the subsequent generations

    4. are very stable and thus are easily separated from the cells

  8. The correct sequence of the last four stages in Kreb's cycle is

    1. malic acid, succinic acid, fumaric acid, oxalo-acetic acid

    2. succinic acid. Fumaric acid, malic acid, oxalo-acetic acid

    3. malic acid, fumaric acid succinic acid, oxalo-acetic acid

    4. succinic acid, malic acid, fumaric acid, oxalo-acetic acid

  9. The correct sequence of the order in which the cell utilises the constituents of the proptoplasm as a source of energy, is

    1. lipids, proteins, carbohydrates

    2. carbohydrates, proteins, lipids

    3. carbohydrates, proteins, lipids

    4. proteins, carbohydrates, lipids

  10. In normal respiration in man, expiration is a passive process caused by

    1. a negative pressure principle

    2. the relaxation of inspiratory muscles

    3. the increase in the volume of thoracic cavity

    4. the Contraction of inspiratory muscles

  11. The correct sequence of events in the coagulation of blood is

  12. The oral contraceptive pill used by women

    1. permits ovulation, but prevents fertilization

    2. permits ovulation, but block luteinization

    3. permits fertilization but interferes with implantation

    4. inhibits ovulation by suppressing pituitary LH secretion

  13. The fertilized egg in human female gets implanted in the uterus after

    1. two month of fertilization.

    2. about 7 days of fertilization

    3. one month of fertilization

    4. three weeks of fertilization

  14. Which one of the following chemical substances is released at the synapse?

    1. Cholesterol

    2. Acetyicholine

    3. Insulin

    4. Bilirubin

  15. Consider the following statements: A simple muscle twitch consists of

    1. contraction phase

    2. relaxation phase

    3. refractory period

    4. latent period

    Of these statements

    1. l, 2 and 4 are correct

    2. 2 and 3 arc correct

    3. 1, 2 and 3 are correct

    4. 3 and 4 are correct