Biology- 11 Chapter 3
Enzymes - 9
1.
Enzymes needed for the synthesis of dna and rna are located in the?
a) Chloroplast
b) Mitochondria
c) Cytoplasm
d) Nucleus
2.
Enzymes needed for mitosis are located in the?
a) Cytoplasm
b) Mitochondria
c) Nucleus
d) Chloroplast
3.
Energy that is required by the molecules to react with one another is known as?
a) Heat energy
b) Chemical energy
c) Kinetic energy
d) Activation energy
4.
The addition of enzymes to a chemical reaction?
a) Increases activation energy
b) Reduces activation energy
c) Does not affect activation energy
d) Both b and c
5.
Which one of the following affects the rate of enzymatic reaction?
a) All of these
b) Ph
c) Enzyme concentration
d) Temperature
6.
The temperature that promotes maximum activity of an enzyme is known as?
a) Minimum temperature
b) Maximum temperature
c) Total temperature
d) Optimum temperature
7.
With an increase in temperature, the enzymatic reaction?
a) Decreases
b) Stops
c) Increases
d) Does not affected
8.
With increase beyond the optimum temperature, the enzymatic reaction?
a) Stops
b) Increases
c) Does not affected
d) Decreases
9.
Most human enzymes work fastest at___degree centigrade?
a) 10 to 20
b) 37 to 40
c) 30 to 35
d) 50 to 70
10.
The bacteria living in hot springs have an optimum enzymatic temperature of ___ degree centigrade?
a) 50
b) 37
c) 40
d) 70
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