Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online

Question 1 of 6

Biology

1. 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?

All active site have been occupied by substrate molecules

More substrate has disturbed the pH of the medium

The enzyme molecules have denatured

More substrate acted as inhibitor

Question 1 of 6

Question 2 of 6

2. Prosthetic groups are;

Required by all enzymes

Proteins in nature

Loosely attached with enzymes

Tightly bound to enzyme

Question 2 of 6

Question 3 of 6

3. To what category of molecules do enzymes belong?

Proteins

Nucleic acids

Carbohydrates

Lipids

Question 3 of 6

Question 4 of 6

4. What is TRUE about enzymes?

They are needed in large quantities

They are not very specific in their choice of substrates

They make biochemical reactions to proceed spontaneously

They lower the activation energy of a reaction

Question 4 of 6

Question 5 of 6

5. What is TRUE about cofactors?

Increase activation energy

Break hydrogen bonds in proteins

Are composed of proteins

Help facilitate enzyme activity

Question 5 of 6

Question 6 of 6

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

A

B

C

D

Question 6 of 6

Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online

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

Biology

More Related Resources

One Comment

Leave a Reply Cancel reply

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

Biology

More Related Resources

More Online Tests

One Comment

Leave a Reply Cancel reply