Question # 1

Lock and key model was proposed by

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Koshland

Emil Fisher

Watson

Flemming

The optimum temperature of human body enzyme is.

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27 ^oC

37^oC

47^oC

57^oC

The rate of an enzyme catalyzed reaction

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Is constant under condition

Decreases as substrate concentration increases

Cannot be measured

Can be reduced by inhibitors

Optimum pH values for enzyme arginase is

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7.60

9.70

8.60

9.52

The optimum pH of pancreatic Lipase is

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7.00

9.00

6.40

5.20

Which one of the following statements about enzymes is not true

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They consist of proteins or without a non-proteins part

They change the rate of catalyzed reaction

They are sensitive to heat

They are non-specific in their action

If more substrate to an already occurring enzymatic reaction is added more enzyme activity is seen because

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There is probably more substrate present than there is enzyme

There is probably more enzyme available than there is substrate

There is probably more product present than either substrate or enzyme

The enzyme substrate complex is probably failing to from during the reaction

An activated enzyme made of polypeptide chain and a co-factor is

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Substrate

Co-enzyme

Apoenzyme

Holoenzyme

Metals is ions are related to.

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Co enzymes

Vitamins

Co factors

Substrate

The detachable co factor of an enzyme is known as

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Co enzyme

Ap enzyme

Activator

Prosthetic group

The inhibitor which may destroy the Globular structure of enzyme is.

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Competitive

Non competitive

Reversible

Irreversible

The raw material for co-enzymes are

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Lipids `

Proteins

Vitamins

None of these

The active site of an enzyme

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Never changes

Forms no chemical bond with substrate

Determines by its structure the specificity of an enzyme

Looks like a lump projection from the surface of an enzyme

An enzyme is said to be denatured when

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It has no co-factor

It is in a condition of low temperature

Its structure is destroyed

None of these

An activated enzyme consisting of a polypodies chain and a co factor is called.

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Apo enzyme

Co enzymes

Holo enzymes

Both a and b

the vitamins are essential raw material for the synthesis of.

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Activators

Co factors

Co enzymes

Prosthetic group

The rate of reaction of enzyme directly depends upon

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Amount of enzyme present at a specific time at unlimited substrate concentration

Nature of substrate

Maximum pH level

Low temperature

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