Solved MCQs of Biology Class 9 Chapter 6

Which of the following variable is least likely to affect an enzymes rate of reaction?

Temperature

pH

Carbon dioxide concentration

Enzyme concentration

Induced Fit model was proposed by:

Emil Fischer

Melcher

Koshland

Saugeo

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?

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

Vitamin which acts as co-enzyme is:

Vitamin A

Vitamin K

Riboflavin

All of these

Optimum temperature for enzymes of human body is:

86°C

37°C

38°C

39°C