MHT CET 202624 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 24 April
- Shift
- Morning Shift
- Subject
- Biology
- Chapter
- Respiration in Plants
MHT CET 2026 · 24 April · Morning Shift · Biology · Respiration in Plants
Given below are two statements: Statement (I): There is...
Given below are two statements:
Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise.
Statement (II): Lactic acid is reconverted into pyruvic acid during resting stage of skeletal muscles.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise.
Statement (II): Lactic acid is reconverted into pyruvic acid during resting stage of skeletal muscles.
In light of the above statements, choose the most appropriate answer from the options given below.
Options
- ABoth Statement (I) and Statement (II) are correct.
- BBoth Statement (I) and Statement (II) are incorrect.
- CStatement (I) is correct but Statement (II) is incorrect.
- DStatement (I) is incorrect but Statement (II) is correct.
Correct answer
A. Both Statement (I) and Statement (II) are correct.
Step-by-step solution
During vigorous exercise, the oxygen demand of skeletal muscles exceeds the oxygen supply. To meet the energy requirements, skeletal muscles undergo anaerobic respiration, where pyruvic acid is reduced to lactic acid by the enzyme lactate dehydrogenase. This leads to the accumulation of lactic acid, causing muscle fatigue. Thus, Statement (I) is correct.
During the resting stage, when adequate oxygen becomes available, the accumulated lactic acid is oxidized back into pyruvic acid. A portion of this pyruvic acid is oxidized in the muscles to generate ATP, while the rest is transported to the liver to be converted into glucose (Cori cycle). Thus, Statement (II) is also correct.
Both Statement (I) and Statement (II) are correct.
Answer: Both Statement (I) and Statement (II) are correct.
During the resting stage, when adequate oxygen becomes available, the accumulated lactic acid is oxidized back into pyruvic acid. A portion of this pyruvic acid is oxidized in the muscles to generate ATP, while the rest is transported to the liver to be converted into glucose (Cori cycle). Thus, Statement (II) is also correct.
Both Statement (I) and Statement (II) are correct.
Answer: Both Statement (I) and Statement (II) are correct.