LHMC Practice Quiz

Question 1

Which level of protein structure is primarily stabilized by hydrogen bonds between the carbonyl oxygen and amide hydrogen of the peptide backbone?

Accepted Answer

Secondary structure

Question 2

Which biomolecule serves as the immediate source of energy for most cellular processes?

Accepted Answer

ATP

Question 3

For an enzyme-catalyzed reaction following Michaelis-Menten kinetics, if substrate concentration is much greater than Km, the reaction velocity will:

Accepted Answer

Become directly proportional to enzyme concentration and approach Vmax

Question 4

An enzyme has a Vmax of 120 µmol/min and a Km of 3 mM. What is the reaction velocity when substrate concentration is 3 mM?

Accepted Answer

60 µmol/min

Question 5

A competitive inhibitor of an enzyme typically causes which change in kinetic parameters?

Accepted Answer

Increased Km and unchanged Vmax

LHMC Mock Test