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Q.

Read the following statements.

Statement A: Repeated activation of the muscles can lead to accumulation of lactic acid due to aerobic respiration.

Statement B: Myoglobin is completely absent in white muscle fibres.

In the light of given statements, choose the correct answer from the options given below.

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a

Both Statement A and Statement B are false.

b

Only A is true but B is false.

c

Only B is true but A is false.

d

Both Statement A and Statement B are true.

answer is A.

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Detailed Solution

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Muscle contains a red coloured oxygen storing pigment called myoglobin. It is low in white muscle fibre (but not completely absent).

Repeated activation of the muscles can lead to the accumulation of lactic acid due to anaerobic breakdown of glycogen in them, causing fatigue. 

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