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Question

Consider the following statements and select the correct option.
(i) GERL includes Golgi body and lysosomes only.
(ii) Peroxisomes help to metabolise xenobiotics.
(iii) Polysomes are aggregates of ribosomes.
(iv) Mitochondria help in oxidative phosphorylation and generation of ATP.

A
(ii), (iii) and (iv) are correct.
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B
(i) alone is correct.
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C
(ii) alone is correct.
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D
(iii) alone is correct.
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Solution

The correct option is A (ii), (iii) and (iv) are correct.
Peroxisomes contains some enzymes that oxidize certain molecules normally found in cell and most importantly it metabolises xenobionts which are generally chemical substances that are foreign to animal life and may cause toxicity. When several ribosomes are held together on a single mRNA chain and can translate the same simultaneously, they are known as polysomes. Mitochondria plays a major role in ATP generation in aerobic animals and also helps in oxidative phosphorylation. On the other hand Golgi complex,Endoplasmic Reticulum and lysosomes comprises together the GERL.
So, option (A) is correct.

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