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Question

Respiratory enzymes occur in bacteria in

A
Plasma membrane
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B
Mitochondria
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C
Golgi apparatus
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D
E.R.
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Solution

The correct option is A Plasma membrane
In many bacteria especially gram-positive bacteria, the plasma membrane becomes invaginated and folded to form structures called mesosomes. The mesosomes were formerly thought to be equivalent to mitochondria of eukaryotic cells. They were believed to be the centres of respiratory activity but it also occurs in the plasma membrane.

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