Solved MCQs of Biology Class 9
Activation energy is required to:
Activation enzyme
Start a reaction
Speed up a reaction
None
Beriberi can be produced by the lack of ……… .
Vitamin A
Vitamin B
Vitamin BI
Vitamin C
Enzymatic reactions are _______ of times faster than uncatalyzed reactions:
Millions
Hundreds
Thousands
Billion
To what category of molecules do enzymes belong?
Carbohydrates
Lipids
Nucleic acids
Proteins
An enzyme, which breaks down starch is:
Protease
Amylase
Tripsn
Lipase
Prosthetic by all enzymes :
Required by all enzymes
Loosely attached with enzymes
Proteins In nature
Tightly bound to enzyme
The enzyme function between a PH of ………………… .
2 to 4
6 to 8
8 to 10
1 to 2
Trypsin works at the PH of:
2
4
8
6
which enzyme converts lipids into fatty acid and glycerol?
Lipase
Amylase
Pepsin
Trypsin
Prosthetic groups are:
Required by all enzymes
Loosely attached with enzymes
Proteins in nature
Tightly bound to enzyme
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