Competitive Exams: Zoology MCQs (Practice-Test 94 of 112)

  1. Dogfish maintains high osmotic equilibrium with the surrounding medium by the secretion of

    1. sodium chloride

    2. urea

    3. uric acid

    4. urea and trimethy lamine oxide

  2. What is the correct sequence of the following factors?

    1. Proaccelerin

    2. Fibrinogen

    3. Prothrombin

    4. Proconvertion

    Select the correct answer using the codes given below:

    1. 2, 3, 4, 1

    2. 2, 3, 1, 4

    3. 3, 2, 4, 1

    4. 3, 2, 1, 4

  3. Consider the following reaction: This reaction occurs in the course of

    1. deamination

    2. oxidative deamination

    3. Krebs cycle

    4. oxidation of fatty acids

  4. The colloidal particles within a cell are in a state of constant, motion which can be seen under the microscope. This motion is called

    1. Cyclosis

    2. Tyndall effect

    3. Brownian movement

    4. Contractile movement

  5. What is the correct sequence of the following events?

    1. Release of beta endorphin.

    2. No ovulation

    3. Suppression of Gonadotropin releasing hormone.

    4. Breast feeding

    Select the correct answer using the codes given below:

    1. 1, 4, 3, 2

    2. 1, 4, 2, 3

    3. 4, 1, 2, 3

    4. 4, 1, 3, 2

  6. What is the correct sequence in Ornithine Cycle of urea formation?

    1. Ornithine

    2. Arginine

    3. Arginosuccinic acid

    4. Urea

    5. Citrulline

    Select the correct answer using the codes given below:

    1. 1, 2, 3, 5, 4

    2. 1, 5, 3, 2, 4

    3. 1, 5, 2, 3, 4

    4. 1, 3, 5, 2, 4

  7. At the end of simple muscle twitch, the muscle normally shows reduction in the level of

    1. ATP

    2. CP

    3. ADP

    4. ATP and CP

  8. When the oxygen equilibrium curve of haemoglobin moves to the right, it is an indication of

    1. negative Bohr effect

    2. Normal Bohr effect

    3. root effect

    4. Haldane effect

  9. Bile juice aids in the digestion and absorption of fat because it contains

    1. lipase

    2. bile salts

    3. bile pigments

    4. cholesterol

  10. Which one of the following cells secretes testosterone?

    1. Spermatogonium

    2. Leyding cell

    3. Sertoli cell

    4. Spermatocyte