Question # 1

Activation energy is required to:

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Activation enzyme

Start a reaction

Speed up a reaction

None

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

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Construction

Destruction

Both a & b

None

Denaturation of enzyme is caused by:

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Increased pH

Decreased pH

Increases in temperature above optimum temperature

Decreases in temperature

Vitamin which acts as co-enzyme is:

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Vitamin A

Vitamin K

Riboflavin

All of these

To what category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

To waht category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

Almost all enzymes are:

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Carbohydrates

Fatty acids

Proteins

Vitamins

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

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

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protein

Carbohydrates

Lipids

Triglyceride

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

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Catalyzed

Dead

Cofactored

Denatured

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

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

Which one of the following convert lipids to fatty acids?

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Protease

Lipase

Both

None

which enzyme converts lipids into fatty acid and glycerol?

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Lipase

Amylase

Pepsin

Trypsin

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

Number of discovered enzymes are:

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200

2000

3000

3500

Which of the following characters is not true about enzymes?

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Globular in shape

Non-specific

Protein in nature

Highly reactive

Coenzymes are small ................. molecules.

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Organic

Inorganic

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

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