MCQ
The enzymes act between the temperature range of:
- A35 - 40 degrees
- B30 - 35 degrees
- C40 - 45 degrees
- D50 degrees and above
Explanation:
Enzymes are biological catalysts which accelerate chemical reactions in organisms.
Optimum temperature is the temperature at which enzyme activity is maximum.
In humans, this temperature is 37.5°C that is same as the normal body temperature.
A rise in temperature above 40°C results in denaturation of the proteins of enzyme.

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(The freezing point depression constant for water $=2\; \mathrm{K}\; \mathrm{kg} \;\mathrm{mol}^{-1}$ )
| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{Cu}+$ dil $\mathrm{HNO}_3$ | $(p)$ NO |
| $(B)$ $\mathrm{Cu}+$ conc $\mathrm{HNO}_3$ | $(q)$ $\mathrm{NO}_2$ |
| $(C)$ $\mathrm{Zn}+$ dil $\mathrm{HNO}_3$ | $(r)$ $\mathrm{N}_2 \mathrm{O}$ |
| $(D)$ $\mathrm{Zn}+$ conc $\mathrm{HNO}_3$ | $(s)$ $\mathrm{Cu}\left(\mathrm{NO}_3\right)_2$ |
| $(t)$ $ \mathrm{Zn}\left(\mathrm{NO}_3\right)_2$ |


