Biomolecules (Zoology)

Biomolecules (Zoology)

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Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. In which one of the following enzymes, is copper necessarily associated as an activator?








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    Tyrosinase (polyphenol oxidase, catecholase) is a copper-containing oxidase which is widely distributed in plants, animals and man. It oxidizes tyrosine to the pigment melanin in mammals and causes the cut surfaces of many fruits and vegetables to darken (browning reactions).

    Correct Option: D

    Tyrosinase (polyphenol oxidase, catecholase) is a copper-containing oxidase which is widely distributed in plants, animals and man. It oxidizes tyrosine to the pigment melanin in mammals and causes the cut surfaces of many fruits and vegetables to darken (browning reactions).

  1. Feedback inhibition of an enzymatic reaction is caused by








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    Correct Option: A

  1. Enzymes enhance the rate of reaction by








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    Activation energy is the energy required to overcome energy barrier of the reactants and make them reactive to start a chemical reaction. Enzymes lower the requirement of activation energy.

    Correct Option: D

    Activation energy is the energy required to overcome energy barrier of the reactants and make them reactive to start a chemical reaction. Enzymes lower the requirement of activation energy.

  1. An enzyme brings about








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    Enzymes accelerate chemical reaction by lowering the activation energy.

    Correct Option: D

    Enzymes accelerate chemical reaction by lowering the activation energy.

  1. Enzymes having slightly different molecular structure but performing identical activity are








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    There are certain enzymes which have slightly different molecular structure but have similar catalytic function such enzymes are known as isoenzymes. Holoenzyme is the active compound formed by combination of a coenzyme and an apoenzyme. Apoenzyme is the protein component of an enzyme, to which the coenzyme attaches to form an active enzyme. Coenzymes are organic nonprotein molecules that bind with the protein molecule (apoenzyme) to form the active enzyme (holoenzyme).

    Correct Option: B

    There are certain enzymes which have slightly different molecular structure but have similar catalytic function such enzymes are known as isoenzymes. Holoenzyme is the active compound formed by combination of a coenzyme and an apoenzyme. Apoenzyme is the protein component of an enzyme, to which the coenzyme attaches to form an active enzyme. Coenzymes are organic nonprotein molecules that bind with the protein molecule (apoenzyme) to form the active enzyme (holoenzyme).