Competitive Exams: Zoology MCQs (Practice-Test 62 of 112)

  1. With reference to pheromone, consider the following statements:

    1. In honey bees, a pheromone is produced by mandibular gland.

    2. The pheromone producing Dufour's gland in ants is located at the posterior end of the abdomen.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  2. Which of the following kinds of substances are preset in the cell wall of correct?

    1. N-acety1glucosamine and Nacetylmuramic acid

    2. Amylopectin and Cellulase

    3. Chitin and Pectin

    4. β-glucoronic acid and N-acetylgala ctosamine

  3. Which one of the following is a steroid hormone?

    1. Calcitonin

    2. Cortisol

    3. Glucagon

    4. Somatostatin

  4. Consider the following statements:

    1. In carbohydrate metabolism, Fructose 1, 6-biphosphate is converted to fatty acids via acetyl CoA.

    2. The liver converts fatty acids to cholesterol.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  5. Consider the following statements:

    1. The oxidative decarboxylation of pyruvate catalyzed by pyruvate dehydrogenase complex is a reversible oxidation process.

    2. Four different vitamins required in human nutrition are components of pyruvate dehydrogenase complex.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  6. Which one of the following causes tetany in young individuals?

    1. Hypoparathyroidism

    2. Hyperparathyroidism

    3. Hypothyroidism

    4. Hyperthyroidism

  7. For each acetyl-CoA oxidized by the citric acid cycle, what is the energy gain?

    1. Two molecules of NADH, one FADH2 and one nucleoside triphosphate

    2. Three molecules of NADH, one FADH2 and one nucleoside triphosphate

    3. Two molecules of NADH, one FADH2 and two nucleoside triphosphate

    4. Three molecules of NADH, one

    FADH2 and two nucleoside triphosphate

  8. Among the following conversions in glycolysis, where is NADH + H + produced?

    1. Fructose 6-phosphate to Fructose 1 − 6, biphosphate

    2. Fructose 1 − 6, biphosphate to glyceraldehyde 3-phosphate

    3. Glyceraldehyde 3-phosphate to 1, 3-biphosphoglycerate

    4. 1, 3-biphosphoglycerate to 3-phosphoglycerate

  9. Consider the following Vitamins:

    1. Vitamin A

    2. Vitamin D

    3. Vitamin E

    Which of the above is/are made up of isoprene units?

    1. 1 and 2 only

    2. 2 only

    3. 1 and 3 only

    4. 1, 2 and 3

  10. Which one of the following vitamins has a role in the formation of collagen?

    1. Vitamin A

    2. Vitamin B2

    3. Vitamin C

    4. Vitamin E

  11. The hormones secreted by the hypothalamus in the region of median eminence are carried to adenohypophysis by which one of the following?

    1. Hypophyseal stalk

    2. Hypophyseal portal system

    3. Pituitary stalk

    4. Neurohypophysis

  12. Consider the following:

    1. Glycine

    2. Histamine

    3. Nitric oxide

    Which of the above is/are neurotransmitters?

    1. 1 and 2 only

    2. 2 only

    3. 1 and 3 only

    4. 1, 2 and 3

  13. Which one of the following is not a characteristic of Agnatha?

    1. Presence of single median nasal opening

    2. Presence of fairly well developed pineal apparatus

    3. Presence of genital duct

    4. Presence of membranous roof of skull

  14. With reference to Pisces, consider the following pairs

      • Scoliodon
      • Presence of anal fin
      • Sting ray
      • Presence of electric fins organs between head and pectoral
      • Torpedo
      • Greatly enlarged pre-orbital cartilages

    Which of the pairs given above is/are correctly matched?

    1. 1 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  15. Consider the following statements:

    1. The nictitating membrane in frog is an outgrowth of the upper lid of the eye.

    2. In frog, the shedding of stratum corneum is due to the secretions of thyroid and pituitary glands.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2