NUTR 313 Exam 3 Questions and Answers (Top Grade Assured) 2026 Update

NUTR 313 Exam 3 Questions and
Answers (Top Grade Assured) 2026
Update
Main forms of Niacin - Correct Answers ✅Nicotinic Acid and
Nicotinamide


Main form of Niacin found in plants - Correct Answers
✅Nicotinic Acid


Main form of Niacin found in supplements - Correct Answers
✅Nicotinamide


Sources of Niacin - Correct Answers ✅Dairy, poultry, fish,
lean meats, nuts, and eggs
Supplemented in cereals and breads


Is Niacin very bioavailable in corn? - Correct Answers ✅No,
only 10% is absorbed


What is one of the main electron carriers in ETC? - Correct
Answers ✅NADH


Niacin synthesis in liver requires what? - Correct Answers
✅Riboflavin, Vitamin B6, and iron

, NUTR 313 Exam 3 Questions and
Answers (Top Grade Assured) 2026
Update
Primary precursor of NAD - Correct Answers
✅Nicontinamide; nicotinic acid is a precursor as well, but
mainly in the liver


What is a hydride ion? - Correct Answers ✅1 proton + 2
electrons


NAD in the cell - Correct Answers ✅NAD > NADP
Found as NAD+ (oxidized)
NADP is found as NADPH (reduced)


High reduction potential = - Correct Answers ✅=higher
affinity (stronger oxidizing agent)


Dehydrogenases - Correct Answers ✅Enzymes that
typically use NAD+ and NADP+ as coenzymes


Deficiency of Niacin results in ___ - Correct Answers
✅Pellegra


NAD+ - Correct Answers ✅Niacin coenzyme primarily used
in energy production