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Assertion : Anaerobic respiration someti...

Assertion : Anaerobic respiration sometimes occurs in our skeletal muscles during strenous exercise.
Reason : Pyruvic acid is reduced to lactic acid by lactate dehydrogenase in the absence of oxygen.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question regarding anaerobic respiration in skeletal muscles during strenuous exercise, we will analyze both statements step by step. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Anaerobic respiration sometimes occurs in our skeletal muscles during strenuous exercise." - During strenuous exercise, the demand for oxygen by the muscles exceeds the supply. As a result, the muscles switch from aerobic respiration (which requires oxygen) to anaerobic respiration (which does not require oxygen). - Therefore, this assertion is **true**. 2. **Understanding the Reason**: - The reason given is "Pyruvic acid is reduced to lactic acid by lactate dehydrogenase in the absence of oxygen." - In anaerobic conditions, glycolysis occurs, producing pyruvic acid. When oxygen is scarce, pyruvic acid is converted into lactic acid through the action of the enzyme lactate dehydrogenase. - This process allows for the regeneration of NAD+, which is necessary for glycolysis to continue. Hence, this reason is also **true**. 3. **Linking Assertion and Reason**: - The reason provided explains how anaerobic respiration occurs in skeletal muscles during strenuous exercise. The conversion of pyruvic acid to lactic acid is a key step in anaerobic respiration, especially when oxygen levels are low. - Since the reason accurately explains the assertion, we conclude that both the assertion and reason are true, and the reason is the correct explanation of the assertion. 4. **Final Conclusion**: - Based on the analysis, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion. ### Final Answer: Both the assertion and reason are true, and the reason is the correct explanation of the assertion. ---
To solve the assertion and reason question regarding anaerobic respiration in skeletal muscles during strenuous exercise, we will analyze both statements step by step. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Anaerobic respiration sometimes occurs in our skeletal muscles during strenuous exercise." - During strenuous exercise, the demand for oxygen by the muscles exceeds the supply. As a result, the muscles switch from aerobic respiration (which requires oxygen) to anaerobic respiration (which does not require oxygen). - Therefore, this assertion is **true**. ...
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