Biochemistry MCAT Practice Questions
832 free Biochemistry MCAT-style practice questions, covering topics like Amino Acids, Peptides and Proteins, Enzymes, Non-Enzymatic Protein Function and Protein Analysis, Carbohydrate Structure and Function, Lipid Structure and Function, DNA and Biotechnology, and more.
Which enzyme is responsible for the hydrolysis of peptide bonds in protein catabolism?Which of the following statements regarding the electron transport chain (ETC) in oxidative phosphorylation is FALSE?Which enzyme is responsible for the conversion of succinyl-CoA to succinate in the citric acid cycle?Which enzyme is responsible for the synthesis of fatty acids from acetyl-CoA and malonyl-CoA?Which of the following is an example of covalent modification of enzymes?Which lipoprotein carries cholesterol from the liver to peripheral tissues?Which of the following monosaccharides is NOT a reducing sugar?Which type of membrane transport requires the assistance of carrier proteins or channel proteins?Which of the following statements regarding the Henderson-Hasselbalch equation applied to amino acids is FALSE?Which of the following is NOT a common structural isomer of glucose?Which of the following monosaccharides is NOT classified as an aldose?An enzyme catalyzes the conversion of substrate A to product B. Under normal physiological conditions, the enzyme exhibits low activity.…Which molecule is the final electron acceptor in oxidative phosphorylation?Which of the following accurately describes the significance of the start codon AUG in protein synthesis?How many ATP molecules are consumed in the energy investment phase of glycolysis?Which hormone promotes glucose uptake by cells and stimulates glycogen synthesis?Which of the following is a product of the conversion of pyruvate to acetyl-CoA?In eukaryotic cells, where does translation primarily occur?The primary structure of a protein can be determined by:Which of the following modifications to histone tails is associated with transcriptional repression?Which of the following signaling lipids acts as a second messenger in response to G-protein coupled receptor activation, leading to…Which of the following is an allosteric activator of glycogen phosphorylase?Which of the following is NOT a characteristic of non-enzymatic protein function?How many stop codons are there in the genetic code?Which of the following is a primary signaling molecule used in cell-to-cell communication?Which histone protein is responsible for DNA packaging in nucleosomes?In an individual with a deficiency of glucose-6-phosphatase enzyme, which of the following pathways would be most directly affected?Which of the following is an example of a coenzyme required for enzyme activity?Which of the following amino acids possesses the highest isoelectric point (pI)?Which of the following best explains the significance of the major groove in DNA structure?Which lipoprotein is commonly referred to as "good cholesterol" due to its role in reverse cholesterol transport?In the context of cellular metabolism, which organelle is primarily responsible for the production of ATP through oxidative phosphorylation?How do peripheral membrane proteins associate with the plasma membrane?What is the primary fate of excess cholesterol in the body?Which of the following is an example of a non-reducing disaccharide? a. MaltoseWhich of the following statements about telomeres is true?Which of the following accurately describes the process of oxidation?Which of the following factors is NOT typically considered when studying enzyme kinetics?Which of the following membrane proteins is responsible for the maintenance of resting membrane potential in excitable cells?Which of the following is an example of an alpha-D-glucose molecule?Which organelle is responsible for packaging and exporting proteins in vesicles?In aqueous solution, which of the following monosaccharides is LEAST likely to form a cyclic hemiacetal or hemiketal?Which of the following metabolic adaptations is most likely to occur in skeletal muscle tissue during prolonged endurance exercise?How many carbon atoms are typically found in a cyclic sugar molecule?During periods of fasting, which hormone promotes the breakdown of triglycerides into fatty acids and glycerol for energy utilization?Which molecule is required for the transport of long-chain fatty acids into the mitochondria for beta-oxidation?When two cysteine residues form a disulfide bond within a protein, which level of protein structure is affected?Which pH value is typically optimal for most enzymes?Where does oxidative phosphorylation occur in eukaryotic cells?What is the primary structure of a phospholipid molecule?