Question # 1

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

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Catalyzed

Dead

Cofactored

Denatured

Enzymes accelerate reactions by_______the activation energy needed for the reaction.

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Stopping

Raising

Lowering

Binding

Vitamin which acts as co-enzyme is:

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Vitamin A

Vitamin K

Riboflavin

All of these

Non-protein part of enzymes are:

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Inhibitors

Substrate

Cofactors

Coenzymes

Anabolism constitute ................ processes.

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Construction

Destruction

Both a & b

None

Which of the following variable is least likely to affect an enzymes rate of reaction?

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Temperature

pH

Carbon dioxide concentration

Enzyme concentration

Minimum energy required to start a chemical reaction is called:

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Potential energy

Chemical energy

Activation energy

All are same

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

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1

2

3

4

which enzyme converts lipids into fatty acid and glycerol?

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Lipase

Amylase

Pepsin

Trypsin

The molecule that fits the active sites that is called:

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Substrate

Enzyme

Catalyst

All

The building units of enzymes are:

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Fatty acids

Glycerol

Nucleic acid

Amino acid

Induced Fit model was proposed by:

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Emil Fischer

Melcher

Koshland

Saugeo

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

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All active sites have been occupied by substrate molecules

The enzyme molecules have denatured

More substrate acted as inhibitor

More substrate has disturbed the pH of the medium

The enzyme function between a PH of ..................... .

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2 to 4

6 to 8

8 to 10

1 to 2

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

There are about ............. to ........ enzymes in cell.

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1000-2000

1000-2050

2000-6000

2000-3000

Enzymes are made up of ............. .

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protein

Carbohydrates

Lipids

Triglyceride

Trypsin works at the PH of:

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2

4

8

6

Lock and key model was proposed by:

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Emil Fischer

Melcher

Koshland

Saugeo

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

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Constructive

Destructive

Both a & b

None

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