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Question

In ETS, which acts as final hydrogen acceptor?

A
Oxygen
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B
Nitrogen
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C
CO2
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D
H2O
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Solution

The correct option is A Oxygen
Electron Transport chain (ETC)

ETC is the final common pathways in aerobic cells by which electrons derived from various substrates are transferred to oxygen.

It is a series of an oxidation-reduction reaction.

Refer image
The enzyme complexes 1-IV are carriers of electron while V is responsible for ATP synthesis.

NADH, Coenzyme Q, Cytochrome C and Oxygen are mobile e carriers.

These are collectively involved in the transport of e which ultimately combines with O2, to produce water.

1462574_1486947_ans_5a200a6852094e92b7e7abf13a7fac3b.png

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