Question # 1

Minimum energy required to start a chemical reaction is called:

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Potential energy

Chemical energy

Activation energy

All are same

The substance on which an enzyme act is called:

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Cofactor

Inhabitor

Coenzyme

Substrate

Vitamin which acts as co-enzyme is:

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Vitamin A

Vitamin K

Riboflavin

All of these

Number of discovered enzymes are:

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200

2000

3000

3500

Which one of the following is specific in action ?

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Catalyst

Enzyme

Both

None

Almost all enzymes are:

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Carbohydrates

Fatty acids

Proteins

Vitamins

Enzymes accelerate reactions by_______the activation energy needed for the reaction.

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Stopping

Raising

Lowering

Binding

Beriberi can be produced by the lack of ......... .

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Vitamin A

Vitamin B

Vitamin BI

Vitamin C

Metabolism is of ............... types.

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1

2

3

4

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

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1000-2000

1000-2050

2000-6000

2000-3000

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

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Inorganic

Organic

Both a & b

None

The average temperature for human is ...............°C.

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35°C

36°C

37°C

38°C

Which one of the following convert lipids to fatty acids?

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Protease

Lipase

Both

None

To what category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

An enzyme, which breaks down starch is:

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Protease

Amylase

Tripsn

Lipase

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

Activation energy is required to:

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Activation enzyme

Start a reaction

Speed up a reaction

None

The optimum temperature for human enzyme is between:

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10-20°C

20-35°C

35-40°C

5-10°C

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

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Construction

Destruction

Both a & b

None

which enzyme converts lipids into fatty acid and glycerol?

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Lipase

Amylase

Pepsin

Trypsin

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