Competitive Exams: Zoology MCQs (Practice-Test 11 of 112)

  1. Angiotension II that can raise blood pressure and is found in blood stream is produced under the influence of which one of the following enzymes?

    1. Ptyalin

    2. Kinin

    3. Renin

    4. Lysozyme

  2. Consider the following effects in the events of stress due to high altitude:

    1. Sodium retention

    2. Disturbed equilibrium of ADH and adrenal steroids

    3. Hypothalamic response

    4. Oligouria.

    The correct sequence of these is:

    1. 2, 3, 4, 1

    2. 3, 2, 1, 4

    3. 2, 3, 1, 4

    4. 3, 2, 4, 1

  3. Consider the following statements: A marathon runner is likely to show

    1. reduced heart rate

    2. enlarged heart

    3. larger stroke volume

    4. decreased arterial blood pressure

    Which of the above statements is/are correct?

    1. all

    2. 1, 2 and 3

    3. 1 and 2

    4. 1 alone

  4. Which one of the following hormones regulates Na + concentration in extracellular fluid?

    1. Epinephrine

    2. Norepinephrine

    3. Aldosterone

    4. Cortisol

  5. Which one of the following occurs in the shuttle mechanism of mitochondria?

    1. Ascorbic acid is oxidised

    2. Ferrous ion is oxidised

    3. NADH is oxidised

    4. Glucose is phosphorylated

  6. Action potential in a neuron is attained due to

    1. faster influx of sodium ions than the rate of outflow of potassium ions

    2. slower influx of sodium ions than the rate of outflow of potassium ions

    3. constant influx and outflow of potassium ions and sodium ions

    4. faster influx of potassium ions than sodium ions

  7. Consider the following statements: Sympathetic nervous system is characterised by:

    1. acetylcholine as neuro secretion.

    2. fight of flight activities.

    3. longer preganlionic fibres.

    4. non-medullated postganglionic fibres.

    5. arising from thoraco-lumbar portion.

    Which of the above statements are correct?

    1. 1, 2 and 3

    2. 2, 4 and 5

    3. 2 and 4

    4. 1, 3 and 5

  8. Cerebrospinal fluid is produced by

    1. neopallium

    2. cerebellum

    3. basal ganglia

    4. choroid plexus

  9. Raw egg white consumption is injurious to health, because it

    1. has high cholesterol

    2. has avidin which binds with biotin and prevents uptake of biotin

    3. inhibits pyridoxal dependent reaction

    4. induces diarrhoea and thereby reduces nutrient absorption

  10. Carbon monoxide inhibits mitochondrial electron transport by

    1. inhibiting the electron transfer of complex I

    2. blocking electron transport at the level of the cytochrome b-cytochrome c1 complex

    3. binding to the oxygen-binding site of cytochrome oxidase

    4. binding to haemoglobin in the erythrocytes and therefore blocking the transport of oxygen to tissues

  11. Glycolysis is regulated by all the enzymes except

    1. hexokinase

    2. phosphohexose isomerase

    3. phosphofructokinase

    4. pyruvate kinase

  12. Which one of the following is NOT the function of the citric acid cycle?

    1. Generation of guanosine triphosphate (GTP)

    2. Generation of reduced nicotinamideadenine dinucleotide (NADH) and reduced flavin-adenine dinucleotide (FADH2)

    3. Complete catalysis of oxidation of acetate to carbon dioxide and water

    4. Net synthesis of oxaloacetate from acetyl coenzyme A (acetyl CoA)

  13. Consider the following statements: Cholecystokinin, one of the hormones of digestive tract

    1. stimulates release of trypsin

    2. inhibits release of pepsin.

    3. stimulates release of lipase.

    Which of the above statements are correct?

    1. 1, 2 and 3

    2. 1 and 2

    3. 2 and 3

    4. 1 and 3

  14. Which of the following hormones can be administered orally to achieve desired result (s)?

    1. Estradiol

    2. Growth hormones.

    3. Cortisol

    4. Insulin.

    Select the correct answer using the codes given below:

    1. 1 and 2

    2. 2, 3 and 4

    3. 1 and 3

    4. 2 alone

  15. Match List I with List II and select the correct answer:

    List-I (Hormones) List-II (Effects)
    1. Melatonin

    2. Relaxin

    3. MSH

    4. STH

    1. Loosening of pelvic ligaments

    2. Influences the activity of ovary

    3. Pigment dispersal in melanophores

    4. Synthesis and release of glucocarticoids

    5. Metabolism of proteins and fat

    • A
    • B
    • C
    • D
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
      • 3
      • 5
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 3
      • 5