Question # 1

Number of discovered enzymes are:

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200

2000

3000

3500

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

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Vitamin A

Vitamin B

Vitamin BI

Vitamin C

To what category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

What is the effect of change in pH?

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Digradation of amino acids at active sites

Ionization of amino acids at active sites

Formation of new amino acids at active sites

All of these

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

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Kinetic

Potential

Activation

None

Prosthetic groups are:

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Required by all enzymes

Loosely attached with enzymes

Proteins in nature

Tightly bound to enzyme

Which one of the following convert protein to amino acids?

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Protease

Lipase

Both

None

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 site have been occupied by substrate molecules

The enzyme molecule have denatured

More substrate acted as inhibitor

More substrate has disturbed the pH of the medium

Which one of the following is specific in action ?

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Catalyst

Enzyme

Both

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

Which enzyme breaks the peptide bods:

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Amylase

Protease

Lipase

None

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

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protein

Carbohydrates

Lipids

Triglyceride

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

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1

2

3

4

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

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