Answered

22. Nicotinamide adenine dinucleotide (NAD) is:

(i) Formed from Vitamin B12
(ii) Attached to the enzyme ligase
(iii) Loosely attached to dehydrogenase enzyme
(iv) Formed from Vitamin B

(Note: The original text contained "Vitamin By," which appears to be a typo. The corrected version lists it as "Vitamin B.")



Answer :

GinnyAnswer

Final answer:

NAD+ is a critical coenzyme in cellular reactions, composed of two linked nucleotides, and exists in oxidized and reduced forms.


Explanation:

Nicotinamide adenine dinucleotide (NAD+) is a vital coenzyme found in all living cells that functions in biological oxidation and reduction reactions. It consists of two nucleotides, linked through a phosphate group, with one nucleotide containing an adenine base and the other containing nicotinamide provided by vitamin niacin. NAD+ is the oxidized form, while NADH is the reduced form after accepting electrons.


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