MCAT Biochemistry PYQ Pattern Practice

PYQ Pattern Practice Easy

PASSAGE 1 — ENZYME KINETICS Researchers study an enzyme that converts substrate S to product P. Without inhibitor, the enzyme has Vmax = 100 micromol…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 1 — ENZYME KINETICS Researchers study an enzyme that converts substrate S to product P. Without inhibitor, the enzyme has Vmax = 100 micromol…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 1 — ENZYME KINETICS Researchers study an enzyme that converts substrate S to product P. Without inhibitor, the enzyme has Vmax = 100 micromol…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

PASSAGE 2 — PROTEIN PURIFICATION A soluble cytosolic enzyme has an isoelectric point (pI) of 5.2 and forms a disulfide-linked dimer. Scientists purif…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Easy

PASSAGE 2 — PROTEIN PURIFICATION A soluble cytosolic enzyme has an isoelectric point (pI) of 5.2 and forms a disulfide-linked dimer. Scientists purif…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 2 — PROTEIN PURIFICATION A soluble cytosolic enzyme has an isoelectric point (pI) of 5.2 and forms a disulfide-linked dimer. Scientists purif…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 3 — MITOCHONDRIAL RESPIRATION Isolated mitochondria receive succinate as the only respiratory substrate. Oxygen consumption and ATP productio…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

PASSAGE 3 — MITOCHONDRIAL RESPIRATION Isolated mitochondria receive succinate as the only respiratory substrate. Oxygen consumption and ATP productio…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Easy

PASSAGE 3 — MITOCHONDRIAL RESPIRATION Isolated mitochondria receive succinate as the only respiratory substrate. Oxygen consumption and ATP productio…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 4 — FASTING METABOLISM After a healthy adult fasts overnight, insulin is low and glucagon is elevated. The liver first supports blood glucose…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 4 — FASTING METABOLISM After a healthy adult fasts overnight, insulin is low and glucagon is elevated. The liver first supports blood glucose…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

PASSAGE 4 — FASTING METABOLISM After a healthy adult fasts overnight, insulin is low and glucagon is elevated. The liver first supports blood glucose…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Easy

QUESTION 13: Which amino-acid side chain is most likely to carry a positive charge at physiological pH?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

QUESTION 14: An alpha helix is stabilized mainly by hydrogen bonds between which groups?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

QUESTION 15: A kinase most commonly transfers the terminal phosphate of ATP to which protein side-chain functional group?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

QUESTION 16: A tetrameric enzyme shows a sigmoidal velocity-versus-substrate curve. Which explanation is most consistent with this observation?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Easy

QUESTION 17: Which polysaccharide feature allows glycogen to release glucose residues rapidly from many sites?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

QUESTION 18: One turn of beta oxidation of a saturated even-chain fatty acyl-CoA directly produces which set of products?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

QUESTION 19: Which statement best distinguishes NADPH from NADH in human metabolism?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

QUESTION 20: A mutation replaces a buried leucine with aspartate in the hydrophobic core of a globular protein. What is the most likely direct effect?

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Easy

PASSAGE 1 — PROTEIN TARGETING AND SECRETION Researchers study a peptide hormone synthesized as a larger precursor. Translation begins on a free ribos…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 1 — PROTEIN TARGETING AND SECRETION Researchers study a peptide hormone synthesized as a larger precursor. Translation begins on a free ribos…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Hard

PASSAGE 1 — PROTEIN TARGETING AND SECRETION Researchers study a peptide hormone synthesized as a larger precursor. Translation begins on a free ribos…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question

PYQ Pattern Practice Medium

PASSAGE 2 — LACTATE METABOLISM During intense exercise, skeletal muscle converts pyruvate to lactate while oxidizing NADH to NAD+. Researchers isolat…

Biological and Biochemical Foundations / Biochemistry

N/A N/A

Open question