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Advanced Nutritional Biochemistry

Nutrition & Food Science

A rigorous examination of physiological responses to nutrients and metabolic pathways.

biochemistry metabolism physiology nutrition

8 Questions Hard Ages 18+ Oct 24, 2026

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About this Study Set

This study set covers Nutrition & Food Science through 8 practice questions. A rigorous examination of physiological responses to nutrients and metabolic pathways. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 Which specific transport protein is responsible for the facilitative diffusion of fructose into enterocytes, independent of sodium-glucose cotransporter 1 (SGLT1)?

A GLUT1
B GLUT2
C GLUT5
D GLUT4

2 What is the primary metabolic role of the enzyme alpha-ketoglutarate dehydrogenase in the citric acid cycle?

A Substrate-level phosphorylation of GTP
B Decarboxylation of alpha-ketoglutarate to succinyl-CoA
C Oxidation of succinate to fumarate
D Reduction of NAD+ to NADH during glycolysis

3 In human lipid metabolism, what is the rate-limiting enzyme in the synthesis of cholesterol?

A HMG-CoA reductase
B Acetyl-CoA carboxylase
C Acyl-CoA cholesterol acyltransferase
D Squalene monooxygenase

4 Vitamin B12 (cobalamin) requires the presence of which specific glycoprotein, secreted by parietal cells, to facilitate its absorption in the terminal ileum?

A Haptocorrin
B Transcobalamin II
C Intrinsic factor
D Gastric lipase

5 Which mineral acts as an essential cofactor for the enzyme glutathione peroxidase, which protects cells from oxidative damage?

A Copper
B Selenium
C Zinc
D Molybdenum

6 During the post-absorptive state, which organ is responsible for the majority of gluconeogenesis to maintain blood glucose homeostasis?

A Skeletal muscle
B Pancreas
C Liver
D Adipose tissue

7 What is the chemical identity of the primary physiological form of Vitamin D synthesized in the skin upon exposure to ultraviolet B radiation?

A Cholecalciferol
B Ergocalciferol
C Calcitriol
D 25-hydroxyvitamin D

8 Which essential amino acid is the primary precursor for the synthesis of the neurotransmitter serotonin within the central nervous system?

A Tyrosine
B Phenylalanine
C Tryptophan
D Methionine

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