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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