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Which of the following derivative of pyridine is mostly found in mammals?

Which of the following derivative of pyridine is mostly found in mammals? Correct Answer Nicotinic acid

Mammals synthesize nicotinic acid through oxidation. The coenzyme forms of nicotinic acid are nicotinamide adenine dinucleotide (NAD). These compounds assist dehydrogenase enzymes in the catabolism of fat, carbohydrates, and amino acids, and in the enzymes involved in synthesis of fats and steroids and other vital metabolites.

Related Questions

Given below are two premises (a and b). From those two premises four conclusions (i), (ii), (iii) and (iv) are drawn. Select the code that states the conclusion/conclusions drawn validly (taking the premises singularly or jointly). Premises : (a) All bats are mammals. (b) No birds are bats. Conclusions : (i) No birds are mammals. (ii) Some birds are not mammals. (iii) No bats are birds. (iv) All mammals are bats.
Given below are two premises (a and b). Four conclusions are drawn from them. Select the code that states validly drawn conclusion(s) [ taking the premises individually or jointly].  Premises : (a) All mammals are warn-blooded animals. (b) No lizards are warm-blooded animals. Conclusions : (i) No lizards are mammals. (ii) Some lizards are mammals. (iii) No warm-blooded animals are lizards. (iv) All warm-blooded animals are mammals.
Statements : All men are vertebrates. Some mammals are vertebrates.

Conclusions :
I. All men are mammals.
II. All mammals are men.
III. Some vertebrates are mammals.
IV. All vertebrates are men.
Which of the following derivative of pyridine is mostly found in mycobacterium tuberculosis?
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