Question # 1

Lock and key model was proposed by

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Koshland

Emil Fisher

Watson

Flemming

If non protein part is loosely attached to proteins it is known as.

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Cofactor

Co enzyme

Active site

Holo ezyme

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

The competitive inhibitor of succinic acid is.

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Fumaric acid

Malonic acid

Acetic acid

Citric acid

Three dimensional globular protein is.

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Starch

Glucose

Enzyme

Antibiotic

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

The catalytic activity of an enzyme is restricted to its small protein called

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Active site

Passive site

Intermediate

Above all

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

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

Induced fit model was proposed by.

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Emil Fischer

Pasteur

Jenner

Koshland

If we add more substrate to already occurring enzymatic reaction and it has no effect on the rate of reaction, then what will be be the situation of the following

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Saturation

Denaturation

Composition

Inhibition

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

The enzyme with optimum pH 5.50 is

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Arginase

Sucrase

pepsin

Enter kinase

According to Lock and key model , the activate is.

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Soft structure

Flexible structure

Rigid structure

Attractive structure

Optimum pH value for enzyme pepsin is.

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4.50

9.00

2.00

5.50

The optimum pH of enzyme pepsin is

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2

6.8

7

9

Optimum pH values for enzyme arginase is

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7.60

9.70

8.60

9.52

Koshland in 1959 proposed the modified form of

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Fluid mosaic model

Induce fit model

Unit membrane model

Reflective index model

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