Question

Rishaan experienced muscular cramps during the training session for his upcoming
football match. Mr. Sen, his coach advised him on a schedule of some aerobic exercises to
overcome his problem of muscular cramps. Rishaan followed his coach’s advice and did
not face the problem of muscular cramps again during his match.
Q 1. Which life process is depicted by the above passage?
a) Respiration
b) Digestion
c) Nutrition
d) Excretion
Q 2. Lack of oxygen in muscles often leads to cramps due to
a) Conversion of pyruvate to ethanol
b) Conversion of glucose to pyruvate
c) Conversion of pyruvate to glucose
d) Conversion of pyruvate to lactic acid
Q 3 Lactic acid produced by anaerobic respiration in yeast?
a) Yes b) No
Q 4. Is carbon dioxide produced by anaerobic respiration in yeast?
a)Yes b) No
Q 5. Why there is an increase in lactic acid concentration in the blood at the beginning of
the exercise?
a) Lack of oxygen
b) Excess of oxygen
c) Lack of carbon dioxide
d) Excess of carbon dioxide

Answer 1

Answer:

Q. 1. respiration

Q. 2. Conversion of pyruvate to lactic acid

Q. 3. Yes

Q. 4.  No

Q. 5. Lack of oxygen

Explanation:

hope it helped:)

Answer 2

Answers about exercise are as follows -

Q 1. Which life process is depicted by the above passage?

a) Respiration

Q 2. Lack of oxygen in muscles often leads to cramps due to

d) Conversion of pyruvate to lactic acid

Q 3 Lactic acid produced by anaerobic respiration in yeast?

b) No

Q 4. Is carbon dioxide produced by anaerobic respiration in yeast?

a)Yes

Q 5. Why there is an increase in lactic acid concentration in the blood at the beginning of

the exercise?

a) Lack of oxygen

• Cellular respiration breaks down glucose into pyruvate in absence of oxygen. Then in presence of oxygen pyruvate is utilised for releasing energy.
• In absence of oxygen, lactic acid is formed in muscle cells and ethanol in yeast.
• Exercise deprives muscle cells from oxygen, thus leading to formation of lactic acid, which in turn results in cramps.