Question # 1

Which enzyme breaks the peptide bods:

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Amylase

Protease

Lipase

None

What is true about cofactors?

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Break hydrogen bonds in proteins

Help facilitate enzyme activity

Increase activation energy

Are composed of proteins

Enzymatic reactions are _______ of times faster than uncatalyzed reactions:

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Millions

Hundreds

Thousands

Billion

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

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Inorganic

Organic

Both a & b

None

Prosthetic by all enzymes :

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Required by all enzymes

Loosely attached with enzymes

Proteins In nature

Tightly bound to enzyme

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

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Emil Fisher

Koshland

Freitz London

None

There are about ............. to ........ enzymes in cell.

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1000-2000

1000-2050

2000-6000

2000-3000

The substance on which an enzyme act is called:

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Cofactor

Inhabitor

Coenzyme

Substrate

Activation energy is required to:

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Activation enzyme

Start a reaction

Speed up a reaction

None

To what category of molecules do enzymes belong?

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Carbohydrates

Lipids

Nucleic acids

Proteins

Vitamin which acts as co-enzyme is:

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Vitamin A

Vitamin K

Riboflavin

All of these

Which one of the following is specific in action ?

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Catalyst

Enzyme

Both

None

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