Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online Solved With Right Answers

Question 1 of 6

Biology

1. To what category of molecules do enzymes belong?

Lipids

Proteins

Carbohydrates

Nucleic acids

Question 1 of 6

Question 2 of 6

2. What is TRUE about enzymes?

They are needed in large quantities

They lower the activation energy of a reaction

They are not very specific in their choice of substrates

They make biochemical reactions to proceed spontaneously

Question 2 of 6

Question 3 of 6

3. Prosthetic groups are;

Proteins in nature

Tightly bound to enzyme

Required by all enzymes

Loosely attached with enzymes

Question 3 of 6

Question 4 of 6

4. Which of these graphs correctly shows the effect of temperature on the rate of an enzyme-controlled reaction?

B

C

D

A

Question 4 of 6

Question 5 of 6

5. 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?

The enzyme molecules have denatured

More substrate has disturbed the pH of the medium

More substrate acted as inhibitor

All active site have been occupied by substrate molecules

Question 5 of 6

Question 6 of 6

6. What is TRUE about cofactors?

Increase activation energy

Break hydrogen bonds in proteins

Help facilitate enzyme activity

Are composed of proteins

Question 6 of 6

Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online

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Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online

Punjab 9th Class Biology Chapter 6 Enzymes Punjab 9th Class

Biology

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Test By Subject	Punjab
Test By Topics	9th Class Biology