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Biology Class 9 Chapter 6 Enzymes-4
1.
The temperature at which the enzyme works fastest is known as?
a) Optimum temperature
b) Maximum temperature
c) Minimum temperature
d) None
2.
When substrate concentration increases, the rate of enzymatic reaction?
a) Increases
b) Decreases
c) Remains constant
d) None of these
3.
The pH at which the enzyme works fastest is called as?
a) Optimum pH
b) Maximum pH
c) Minimum pH
d) None of these
4.
The enzyme pepsin is present in?
a) Stomach
b) Liver
c) Brain
d) Heart
5.
The enzyme pepsin is active in ___ medium?
a) Acidic
b) Alkaline
c) Neutral
d) All of these
6.
The enzyme trypsin works in?
a) Small intestine
b) Brain
c) Kidney
d) Heart
7.
The enzyme trypsin is active at___medium?
a) Alkaline
b) Acidic
c) Neutral
d) None of these
8.
Emil Fischer was a ___ biologist?
a) German
b) Canadian
c) French
d) Greek
9.
Who proposed the lock and key model?
a) Emil fischer
b) Koshland
c) Mendel
d) Pastuer
10.
Induced fit model was proposed by?
a) Koshland
b) Mendel
c) Fischer
d) Pastuer
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