Enzymes Chapter 6 Biology 9th Class MCQ Test Preparation Punjab

Total Questions: 23

Total Marks: 23

Time: 25 Mins

Question # 1

To remove resistant starch residues in dish washing used

Protease enzyme
Amylase enzyme
Susbtrats
None

Question # 2

Regulators of enzymatic reactions are classified as:

Question # 3

Trypsin with high pH in alkaline medium works in

Small intestine
Large intestine
Rectum
Denum

Question # 4

Thiamine is a viteman which act as

Cofactor
Coenzyme
Inhibitor
Activator

Question # 5

The optimum temperature for maximum working speed of human enzyme is

Question # 6

Enzyme present in leaf, latex and roots of papaya and mountain papaya is:

Papanelin
Papus
All of these
Papain

Question # 7

Vitamins are essential to the survival of organisms, because vitamins usually function as:

None of these
Coenzyme
Prosthetic group
Cofactors

Question # 8

Enzyme activity can be regulated by

Inhibitors and activators
Inhibitors and cofactors
Cofactors and coenzymes
Inhibitors and coenzymes

Question # 9

Amylase is an enzyme involved in the digestion of:

Potato
Almonds
Snack foods
All of these

Question # 10

Coenzymes are small molecules. The nature of coenzyme is:

Complex molecule
None of these
Inorganic ion
Organic molecule

Question # 11

Lock and key model explains

Enzyme substrate
Enzyme specificity
Formation of enzyme
None of these

Question # 12

Catalytic region in which small portion of molecules are involved in catalysis of a biochemical reaction is called

active site
absorption site
duplication site
All of these

Question # 13

If the concentration of enzyme is kept constant and amount of substrate is increased, a point is reached where increase in substrates concentration does not affect the reaction rate because of:

Enzymes get denatured at higher substrate concentration
Rate of reaction is indirectly proportional to substrate concentration at this point
All the active sites on enzyme molecule are occupied
None of these

Question # 14

Flavin and heme is organic that lies under