Question # 1

Catabolism constitutes ................. processes.

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Constructive

Destructive

Both a & b

None

When we add more substrate to an already occuring enzymatic reaction and there is no increase in the rate of reaction, what would you predict?

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All actives sites have been occupied by substrate molecules

The enzyme molecule have denatured

More substrate acted as inhibitor

More substrate has disturbed has disturbed the pH of the medium

Lock and key model was proposed by ................. .

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Emil Fisher

Koshland

Freitz London

None

Prosthetic by all enzymes :

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Required by all enzymes

Loosely attached with enzymes

Proteins In nature

Tightly bound to enzyme

Enzymes accelerate reactions by_______the activation energy needed for the reaction.

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Stopping

Raising

Lowering

Binding

When an enzyme is no longer able to work, it is said to be:

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Catalyzed

Dead

Cofactored

Denatured

Coenzymes are small ................. molecules.

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Organic

Inorganic

Both

None

Pepsin works at the PH of ............... .

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1

2

3

4

Non-protein part of enzymes are:

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Inhibitors

Substrate

Cofactors

Coenzymes

Prosthetic groups are:

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Required by all enzymes

Loosely attached with enzymes

Proteins in nature

Tightly bound to enzyme

Activation energy is required to:

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Activation enzyme

Start a reaction

Speed up a reaction

None

Enzymes are ............. catalysts.

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Inorganic

Organic

Both a & b

None

The that is needed to initiate chemical reaction that energy is called ................... . energy.

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Kinetic

Potential

Activation

None

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