Competitive Exams: Zoology MCQs (Practice-Test 40 of 112)

  1. The enormous diversity of protein molecules is mainly due to

    1. Peptide bonds

    2. Amino groups in amino acids

    3. Carboxyl groups in amino acids

    4. Amino acid sequences

  2. Which wildlife reserve in India is popularly know as Floating National Park?

    1. Keibul Lamjo National Perk

    2. Keoladeo Ghana National Park

    3. Chilka Lake Sanctuary

    4. Nal Sarovar Sanctuary

  3. The termination of gastrula ion is indicated by

    1. Closure of neural tube

    2. Closure of blast pore

    3. Obliteration of archenteron

    4. Obliteration of blastocoels

  4. In honey-bees, the drones are produced from

    1. Fertilized eggs

    2. Unfertilizes eggs

    3. Larvae fed with royal jelly

    4. Larvae not fed properly

  5. The enzymes in the venom of snake exerting pharmacological effects are

    1. Alkaline and acid phosphatase

    2. Esterase and lipase

    3. Protease and phospholipase

    4. Carboxylase and oxidase

  6. If the head is covered with scales and not shields, then it is a

    1. Krait

    2. Viper

    3. Cobra

    4. Rat snake

  7. Genomic Library contains

    1. Cloned DNA stored in situ

    2. Cloned DNA stored ex situ

    3. Cloned DNA stored in prokaryotes

    4. Cloned DNA stored in eukaryotic cells

  8. The term ‘biotic potential’ as coined by Chapman means the

    1. Inherent property of an organism to reproduce to survive

    2. Capacity of an individual organism to tolerate the stress

    3. Adaptive potential of an individual organism in a changing climate

    4. Potentiality of an organism to increase its biomass when kept under the favorable conditions

    • Assertion (A): The crop milk is produced by both male and female Columba livi.
    • Reason (R): The males of this species have special milk producing glands
    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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

  9. Assertion (A) Adults are globular in Asteroidea and Echinoidea but cylindrical in Holothuroide. Reason (R): Relative development of ambs and interembs determines the shape of the adult body in echinocierms

    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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): Hydra Obelia, Aurelia and adamisa belong to ctenophor.
    • Reason (R): They exhibit radial symmetry, are diploblastic and have nematocyst
    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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): After the addition of the last amino acid to a growing polypeptide chain the protein synthesis stop.
    • Reason (R): The termination codon reacts with release factor (s) and the. Resultant

    RF-terminator codonribosome complex effectively blocks further chain elongation

    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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 respiratory acidosis there is an elevation of arterial CO2 and H.
    • Reason (R): In hypoventilation, CO2 is not eliminated as fast as it is produced
    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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 their role of constricting the arterioles the effect of vasopressin lasts much longer as compared to the effect of adrenali.
    • Reason (R): Vasopressin is an amine whereas adrenaline is a polypeptide
    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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): Approximately 90% of eukaryotic DNA is not transcribed and translated and translated, and lies apparently functionless and dorman.
    • Reason (R): Natural selection operated to weed out apparently unnecessary DNA
    1. Both A and R are individually true and R is the correct explanation of A

    2. Both A and R are individually 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