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MCAT VIP Practice Exam
MCAT — The MCAT (Medical College Admission Test) is administered by the AAMC; it consists of 230 questions across 4 sections (Chemical and Physical Foundations, CARS, Biological and Biochemical Foundations, and Psychological/Social/Biological Foundations), lasts approximately 7.5 hours, and is scored 472–528 with no universal pass/fail threshold — medical schools set their own competitive cutoffs, typically 508–515+.
30
Questions
95m
Time Limit
60.00%
To Pass
Question 1 of 30👑 VIP
A researcher is studying an enzyme that catalyzes the hydrolysis of a peptide bond between a lysine residue and the adjacent alanine in a polypeptide chain. The enzyme exhibits Michaelis-Menten kinetics. When the substrate concentration is exactly equal to the Km, what fraction of the enzyme's active sites are occupied by substrate?
Questions 2–30 and full explanations are VIP-exclusive.