Question # 1

All enzymes are composed of:

Choose an answer

Lipids

Carbohydrates

Proteins

Phosphates

Pepsin works at the PH of ............... .

Choose an answer

1

2

3

4

Enzymes accelerate reactions by_______the activation energy needed for the reaction.

Choose an answer

Stopping

Raising

Lowering

Binding

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

Choose an answer

protein

Carbohydrates

Lipids

Triglyceride

Which of the following characters is not true about enzymes?

Choose an answer

Globular in shape

Non-specific

Protein in nature

Highly reactive

An enzyme, which breaks down starch is:

Choose an answer

Protease

Amylase

Tripsn

Lipase

Which one of the following convert protein to amino acids?

Choose an answer

Protease

Lipase

Both

None

Minimum energy required to start a chemical reaction is called:

Choose an answer

Potential energy

Chemical energy

Activation energy

All are same

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

Choose an answer

Catalyzed

Dead

Cofactored

Denatured

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

Choose an answer

Emil Fisher

Koshland

Freitz London

None

Denaturation of enzyme is caused by:

Choose an answer

Increased pH

Decreased pH

Increases in temperature above optimum temperature

Decreases in temperature

Enzymatic reactions are _______ of times faster than uncatalyzed reactions:

Choose an answer

Millions

Hundreds

Thousands

Billion

Prosthetic groups are:

Choose an answer

Required by all enzymes

Loosely attached with enzymes

Proteins in nature

Tightly bound to enzyme

Who used the term enzyme first time?

Choose an answer

Oscar Hertwing

Winhelm kuhne

W-Flemming

T.H.Morgan

The bio-chemical reactions in which large molecules are synthesized is called:

Choose an answer

Anabolism

Catabolism

Metabolism

Enzymatic reaction

Number of discovered enzymes are:

Choose an answer

200

2000

3000

3500

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?

Choose an answer

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

Lock and key model was proposed by:

Choose an answer

Emil Fischer

Melcher

Koshland

Saugeo

Which one of the following is specific in action ?

Choose an answer

Catalyst

Enzyme

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?

Choose an answer

All active sites have been occupied by substrate molecules

The enzyme molecules have denatured

More substrate acted as inhibitor

More substrate has disturbed the pH of the medium

More Classes

Other Links

Biology 9th Class English Medium Chapter 6 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer