Question

B
Directions (Q. No. 17-20): Each que
four sub-parts in each question
22.17 Naren was participating in a marathon. He was running at position two, right from the beginning,
Just when he was nearing the finishing line, he started running
even faster so as to stand first. And
when he was about to win the marathon, he got a severe muscle cramp in his leg. This cramp
prevented Naren from running any further and shattered his dream
of winning the marathon.
(1) The process which provides most of the energy to Naren for running the marathon is:
(a) Anaerobic Respiration
(b) Aerobic Respiration
(c) Breathing
(d) Fermentation
(1) The process which provides a little extra energy to Naren for running very fast towards the end of race is:
(a) Anaerobic Respiration
(b) Aerobic Respiration
(c) Breathing
(d) Fermentation
(iii) The substance which gets accumulated in the leg muscles of Naren that causes muscle cramp is:
(a) Pyruvate
(b) Ethanol
(c) Carbon dioxide (d) Lactic acid
(iv) Which of the following is correct for the process of anaerobic respiration?
(a)
(b)
(0)
(d)
Carbon dioxide
always produced
Yes
No
No
A lot of energy is
released
No
Yes
No
Yes
Yes

Answer 1

Answer:

Explanation:

During the time of sternous activities like fast running and exercises, the immediate need of body for energy is carried out by anaerobic respiration of glucose, as the amount of oxygen reaching at the tissue level might be limited in such situations .

(b) Due to anaerobic mechanism of respiration during heavy exercise , the incomplete oxidation of glucose results in formation of lactic acid inside the muscle, which often causes muscle cramps in such situations.

Answer 2

Answer:

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Explanation:

(i) Aerobic Respiration [b]

(ii) Anaerobic  Respiration [a]

(iii) Lactic Acid [d]

(iv) No, No [c]