Question # 1

Almost all enzymes are:

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Carbohydrates

Fatty acids

Proteins

Vitamins

The optimum temperature for human enzyme is between:

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10-20°C

20-35°C

35-40°C

5-10°C

To waht category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

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

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Emil Fisher

Koshland

Freitz London

None

Which enzyme breaks the peptide bods:

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Amylase

Protease

Lipase

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

The molecule that fits the active sites that is called:

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Substrate

Enzyme

Catalyst

All

Vitamin which acts as co-enzyme is:

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Vitamin A

Vitamin K

Riboflavin

All of these

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

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2 to 4

6 to 8

8 to 10

1 to 2

Lock and key model was proposed by:

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Emil Fischer

Melcher

Koshland

Saugeo

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

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Catalyzed

Dead

Cofactored

Denatured

Which one of the following convert lipids to fatty acids?

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Protease

Lipase

Both

None

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

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