Competitive Exams: Zoology MCQs (Practice-Test 8 of 112)

  1. India is the lone producer of

    1. tussar silk

    2. muga silk

    3. eri silk

    4. mulberry silk

  2. The sting of honey bee is considered to be of therapeutic value in

    1. goitre and dermatitis

    2. bradycardiac encephalitis

    3. some forms of arthritis

    4. spondylitis deformans

  3. Which one of the following statements is correct? In pigeons

    1. both inspiration and expiration are caused by the movement of pectoral muscles during flight

    2. both inspiration and expiration are caused by the movement of pectoral muscles at the time of rest

    3. inspiration is caused by the movement of abdominal

    4. muscles and expiration by intercostal muscles at the time of rest inspiration is caused by the movement of intercostal muscles arid expiration by abdominal muscles during flight

    • Assertion (A): Mitosis increases the cell population and thus helps in the process of growth.
    • Reason (R): In certain organisms mitosis helps in reproduction.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): In Echinodermata, the coelom is a multipurpose organ system.
    • Reason (R): The hydrocoel is capable of meeting the needs of respiration, nutrition, locomotion, sensory perception or a combination of these.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Sponges have an isolated phylogenetic position and are placed separately as parazoa.
    • Reason (R): Origin of sponges is uncertain and they differ from both protozoa and metazoa.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Sycon is capable of considerable regeneration, even from a single cell.
    • Reason (R): There is totipotency of cellular units in this animal.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Some of the sperms produced by the testes of Pila are incapable of fertilizing ova and are nonmotile.
    • Reason (R): Eupyrene types of sperms are non-energetic.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): The Kolliker's put in adult Amphioxus is a pocket of ciliated ectogerm cells and marks the position of neuropore.
    • Reason (R): The Kolliker's pit has no specialized sensory cells nor does it have any connection with brain.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Scoliodon is capable of maintaining orientation and equlibration with regard to gravity while swimming.
    • Reason (R): The neuromast organs of Scoliodon consist of lateral line receptors and pit organs.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Out of the two types of glucose phosphorylating enzymes, hexokinase is physiologically more important in controlling blood glucose level.
    • Reason (R): Glucokinase, the other phosphorylating enzyme, phosphorylates only D-glucose and has a much higher Km for D-glucose.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): The synthesis (anabolism) and degradation (catabolism) of protoplasm deals largely with protein metabolism.
    • Reason (R): Proteins generally form the major constituent of living matter.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): In starvation and diabetes, the concentration of free fatty acids (FFA) in the blood increases.
    • Reason (R): The fatty acids circulate in blood in combination with plasma albumin.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): In spite of sufficient insulin being secreted by the islets of Langerhans, diabetes mellitus may strike an individual.
    • Reason (R): The number of insulin receptors on the target cells decreases due to a negative feedback mechanism.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): In metamorphosing tadpole of frog, the tail material is gradually accumulated in the body region and thus kelps in disappearance of the tail.
    • Reason (R): Lysosomes become highly active in the tail region of tadpole.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true