Solved MCQs of Biology Class 9 Chapter 6

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Solved MCQs of Biology Class 9


Coenzymes are small …………….. molecules.
Organic
Inorganic
Both
None

The building units of enzymes are:
Fatty acids
Glycerol
Nucleic acid
Amino acid

Anabolism constitute ……………. processes.
Construction
Destruction
Both a & b
None

There are about …………. to …….. enzymes in cell.
1000-2000
1000-2050
2000-6000
2000-3000

Minimum energy required to start a chemical reaction is called:
Potential energy
Chemical energy
Activation energy
All are same

The optimum temperature for human enzyme is between:
10-20°C
20-35°C
35-40°C
5-10°C

To waht category of molecules do enzymes belong?
Carbohydrates
Lipids
Nucleic acids
Proteins

Enzymes are …………. catalysts.
Inorganic
Organic
Both a & b
None

What is the effect of change in pH?
Digradation of amino acids at active sites
Ionization of amino acids at active sites
Formation of new amino acids at active sites
All of these

Almost all enzymes are:
Carbohydrates
Fatty acids
Proteins
Vitamins

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