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 Multiple Choice QuestionsMultiple Choice Questions

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11.

The enzyme recombinase is required at which stage of meiosis

  • Pachytene

  • Zygotene

  • Diplotene

  • Diplotene

603 Views

12.

Which one is the most abundant protein in the animal world?

  • Trypsin

  • Haemoglobin

  • Collagen

  • Collagen

520 Views

13.

Which one out of A – D given below correctly represents the structural formula of the basic amino acid?

  • C

  • D

  • A

  • A

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14.

For its activity, carboxypeptidase requires

  • Zinc

  • Iron

  • Niacin

  • Niacin

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15.

Which one of the following biomolecules is correctly characterised?

  • Lecithin – A phosphorylated glyceride found in cell membrane

  • Palmitic acid – An unsaturated fatty acid with 18 carbon atoms

  • Adenylic acid – adenosine with a glucose phosphate molecule

  • Adenylic acid – adenosine with a glucose phosphate molecule

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16.

Which one of the following statements in incorrect?

  • A competitive inhibitor reacts reversibly with the enzyme to form an enzymeinhibitor complex

  • In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.

  • The competitive inhibitor does not affect the rate of breakdown of the enzymesubstrate complex.

  • The competitive inhibitor does not affect the rate of breakdown of the enzymesubstrate complex.

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17.

Which of the following enzymes carries out initial step in the digestion of milk in humans?

  • Rennin

  • Lipase

  • Trypsin

  • Trypsin

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18.

The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration)

What do the two axises (X and Y) represent?


  • X –axis

    Y-axis

    Temperature

    Enzyme activity

  • X –axis

    Y-axis

    Substrate concentration

    enzymatic activity

  • X –axis

    Y-axis

    enzymatic activity

    temperature
  • X –axis

    Y-axis

    enzymatic activity

    temperature
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19.

Three of the following statements about enzymes are correct and one is wrong. which one is wrong?

  • Enymes require optimum pH for maximal activity

  • Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80o-90o C

  • Enzymes are highly specific

  • Enzymes are highly specific

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20.

The 3' 5'  phosphodiester linkages inside a polynucleotide chain serve to join

  • one DNA strand with the other DNA strand

  • one nucleoside with another nucleoside

  • one nucleotide with another nucleotide

  • one nucleotide with another nucleotide

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