Question # 1

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

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Emil Fisher

Koshland

Freitz London

None

Which of the following characters is not true about enzymes?

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Globular in shape

Non-specific

Protein in nature

Highly reactive

Which enzyme works in stomach?

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Lipase

Trypsin

Pepsin

Amylase

Optimum temperature for enzymes of human body is:

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86°C

37°C

38°C

39°C

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 substance on which an enzyme act is called:

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Cofactor

Inhabitor

Coenzyme

Substrate

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

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Inorganic

Organic

Both a & b

None

metabolism is the some of the ................. proesses.

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Chemical

Physical

Both

None

The building units of enzymes are:

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Fatty acids

Glycerol

Nucleic acid

Amino acid

Which one of the following is specific in action ?

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Catalyst

Enzyme

Both

None

Denaturation of enzyme is caused by:

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Increased pH

Decreased pH

Increases in temperature above optimum temperature

Decreases in temperature

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

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

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