Question # 1

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

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

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Vitamin A

Vitamin B

Vitamin BI

Vitamin C

The first step in the cycle of an enzyme is;

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Substrate binds to enzyme

Substrate converted

Products released

Enzyme become free

To waht category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

Which one of the following convert lipids to fatty acids?

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Protease

Lipase

Both

None

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

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Constructive

Destructive

Both a & b

None

Which one of the following is specific in action ?

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Catalyst

Enzyme

Both

None

Minimum energy required to start a chemical reaction is called:

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Potential energy

Chemical energy

Activation energy

All are same

The molecule that fits the active sites that is called:

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Substrate

Enzyme

Catalyst

All

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

Which of the following characters is not true about enzymes?

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Globular in shape

Non-specific

Protein in nature

Highly reactive

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9th Class Biology Chapter 6 Enzymes English Medium KPK Boards Online Mcqs MCQs With Answers

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