What is the role of NAD+ in cellular respiration ?
It is a nucleotide source for ATP synthesis.
It functions as an electron carrier.
It functions as an enzyme.
It is the final electron acceptor for anaerobic respiration.
As we learnt in
Cellular respiration -
Oxidation breakdown of food materials within the cell which releases energy and biochemical intermediates.
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At various chemical reactions, the NAD+ picks up an electron from glucose, at which point it becomes NADH. Then NADH, along with another molecule flavin adenine dinucleotide (FADH2) will ultimately transport the electrons to the mitochondria, where the cell can harvest energy stored in the electrons.
Hence It functions as an electron carrier.
Option 1)
It is a nucleotide source for ATP synthesis.
This is incorrect.
Option 2)
It functions as an electron carrier.
This is correct.
Option 3)
It functions as an enzyme.
This is incorrect.
Option 4)
It is the final electron acceptor for anaerobic respiration.
This is incorrect.