FSHN 360 Exam 3 questions with
100% correct answers graded A+
2025/2026
Riboflavin - correct answer ✔✔Electron donor & acceptor
Oxidative-reduction reactions
Niacin - correct answer ✔✔One active form contains a phosphate group one does not
Phosphorylated form involved in fatty acid synthesis
Thiamin - correct answer ✔✔Requires 2 phosphate groups
Oxidative decarboxylation
Biotin - correct answer ✔✔Protein (enzyme)-bound
Carboxylation
B12 - correct answer ✔✔Contains cobalt (Co) to be active
Two known rxns: methylation and isomerization
Pantothenic Acid - correct answer ✔✔Coenzyme A form
Can acetylate proteins
Folate - correct answer ✔✔Reduced and polyglutamated
1-carbon transfer reactions
, Vitamin C - correct answer ✔✔Similar in structure to glucose
Hydroxylation
B6 - correct answer ✔✔Forms a Schiff-base
Transamination
T/F Pellagra symptoms may appear during B6 deficiency, because it is required in the process of
obtaining niacin from tryptophan. - correct answer ✔✔True
T/F B-carotene is a better source of Vitamin A because we get 2 molecules of retinol when it is
metabolized in the enterocyte (i.e. B-carotene is essentially 2 molecules of retinol linked
together) - correct answer ✔✔False, only 1/6 is absorbed and half of that is converted to retinol
T/F Water-soluble vitamins are not stored, but readily excreted-the one exception is that we can
store B12 in the liver. - correct answer ✔✔True
T/F Megaloblastic anemia and microcytic anemia are two different conditions, as they are the
result of folate deficiency and B12 deficiency, respectively. - correct answer ✔✔False, microcytic
anemia is a B6 deficiency
T/F Typically, water-soluble vitamins require a transport protein to cross plasma membranes and
enter cells - correct answer ✔✔True
T/F The primary role of vitamin C is as an oxidizing agent to restore the mineral component of
specific enzymes to their reduced state. - correct answer ✔✔False, vitamin C is a reducing agent
T/F High levels of homocysteine (hyperhomocysteinemia) in the circulation and urine have been
implicated in a number of pathologies including cardiovascular disease. - correct answer
✔✔True
100% correct answers graded A+
2025/2026
Riboflavin - correct answer ✔✔Electron donor & acceptor
Oxidative-reduction reactions
Niacin - correct answer ✔✔One active form contains a phosphate group one does not
Phosphorylated form involved in fatty acid synthesis
Thiamin - correct answer ✔✔Requires 2 phosphate groups
Oxidative decarboxylation
Biotin - correct answer ✔✔Protein (enzyme)-bound
Carboxylation
B12 - correct answer ✔✔Contains cobalt (Co) to be active
Two known rxns: methylation and isomerization
Pantothenic Acid - correct answer ✔✔Coenzyme A form
Can acetylate proteins
Folate - correct answer ✔✔Reduced and polyglutamated
1-carbon transfer reactions
, Vitamin C - correct answer ✔✔Similar in structure to glucose
Hydroxylation
B6 - correct answer ✔✔Forms a Schiff-base
Transamination
T/F Pellagra symptoms may appear during B6 deficiency, because it is required in the process of
obtaining niacin from tryptophan. - correct answer ✔✔True
T/F B-carotene is a better source of Vitamin A because we get 2 molecules of retinol when it is
metabolized in the enterocyte (i.e. B-carotene is essentially 2 molecules of retinol linked
together) - correct answer ✔✔False, only 1/6 is absorbed and half of that is converted to retinol
T/F Water-soluble vitamins are not stored, but readily excreted-the one exception is that we can
store B12 in the liver. - correct answer ✔✔True
T/F Megaloblastic anemia and microcytic anemia are two different conditions, as they are the
result of folate deficiency and B12 deficiency, respectively. - correct answer ✔✔False, microcytic
anemia is a B6 deficiency
T/F Typically, water-soluble vitamins require a transport protein to cross plasma membranes and
enter cells - correct answer ✔✔True
T/F The primary role of vitamin C is as an oxidizing agent to restore the mineral component of
specific enzymes to their reduced state. - correct answer ✔✔False, vitamin C is a reducing agent
T/F High levels of homocysteine (hyperhomocysteinemia) in the circulation and urine have been
implicated in a number of pathologies including cardiovascular disease. - correct answer
✔✔True
