Competitive Exams: Zoology MCQs (Practice_Test 16 of 112)

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  1. Pantothenic acid is a constituent of the coenzyme involved in
    1. acetylation
    2. decarboxylation
    3. oxidation
    4. reduction
  2. Compared to resting stage, vigorously contracting muscle shows
    1. increased conversion of pyruvate to lactate
    2. decreased NADH/NAD + ratio
    3. decreased AMP concentration
    4. decreased Level of fructose 2,6-biphosphate
  3. Consider the following enzymes of glycolytic pathway:
    1. Glyceraldehyde-3-phosphate dehydrogenase
    2. Enolase
    3. Pyruvate kinase
    4. Phosphoglycerate kinase

    The correct order in which they appear in the pathway is

    1. 2,1, 4,3
    2. 3,2, 1,4
    3. 4,3, 2,1
    4. 1,4, 2,3
  4. Out of the following, which is the rate limiting enzyme in glycolysis?
    1. Pyruvate kinase
    2. Phosphofructo kinase
    3. Phosphogluco isomerase
    4. Gluco kinase
  5. The postovulatory regression of the corpus luteum is caused by
    1. a decrease in LH secretion
    2. a decrease in FSH secretion
    3. reduction in the steroidogenic capacity of the corpus
    4. luteum
    5. an increase in HCG secretion
  6. When parathyroid gland is surgically removed from a mammal, the blood level of
    1. calcium and phosphorus increase
    2. calcium and phosphorus decrease
    3. calcium increases while that of phosphorus decreases
    4. calcium decreases while that of phosphorus increases.
  7. Which one o. The following is NOT a neuropeptide hormone?
    1. ADH
    2. Oxytocin
    3. Somatomedin
    4. TRH
  8. Which one of the following statements is correct?
    1. Simple lipids are esters of fatty acids with various alcohols
    2. Complex lipids are esters of fatty acids with various alcohols
    3. Phospholipids contain only fatty acids and an alcohol
    4. Neutral Lipids. Are cholesterols and waxes
  9. Which one of the following pairs is NOT correctly matched?
      • Bioluminescent polychaete
      • Chaetopterus
      • Protrusible pharynx with strong teeth
      • Nereis
      • Trochophore larva
      • Megascolex
      • Metameric segmentation
      • Hirudinaria
  10. Which one of the following establishes a commensal association with Eupagurus living in a gastropod shell?
    1. Adamsia
    2. Zoochlorella
    3. Aurelia
    4. Ctenoplana
  11. Which one of the following is a siphonophore and exhibits polymorphism?
    1. Plumularia
    2. Gorgonia
    3. Alcyonium
    4. Parpita
  12. Pedicellariae in echinoderms serve as
    1. defence and cleansing organs
    2. filtering and gustatory organs
    3. Gustatory and locomotory organs
    4. organs of locomotion and food capture
  13. Ammocoetes larva is characteristic of
    1. eel
    2. lampreys
    3. Hagfishes
    4. Coelacanth
  14. Wheel organ and Hatschek՚s pit are present in
    1. Myxine
    2. Petromyzon
    3. Herdmania
    4. Branchiostoma
  15. Which one of the following is neither a fish nor a snake but an amphibian?
    1. Anguilla
    2. Typhlops
    3. Ophiosaurus
    4. Ichthyaphis