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 molecule is regenerated at the end of the citric acid cycle to restart the cycle?What is the complementary base pair for adenine (A) in DNA?Which enzyme is responsible for the interconversion of ribulose-5-phosphate and ribose-5-phosphate in the non-oxidative phase?The lock-and-key model of enzyme-substrate interaction suggests that:Which enzyme catalyzes the conversion of HMG-CoA to acetoacetate during ketogenesis?Histones are rich in which amino acids?In eukaryotic cells, which organelle is primarily responsible for the synthesis of phospholipids?Which of the following metabolic states is characterized by the uptake and utilization of nutrients from recent meals?The primary structure of a protein refers to:Which of the following is NOT a major component of the DNA replication fork?Which of the following is NOT a function of bile salts in lipid digestion and absorption?Which of the following molecules is produced as a byproduct during the conversion of pyruvate to acetyl-CoA?Which of the following statements accurately describes the process of cyclization in monosaccharides?In a cell undergoing osmotic stress, which membrane component plays a crucial role in maintaining cell volume and osmotic balance?Which tissue is responsible for the storage and mobilization of triglycerides?Which of the following enzymes is NOT involved in the conversion of acetoacetate to succinyl-CoA?Which storage form of lipids is predominant in adipose tissue?Which of the following compounds inhibits the activity of pyruvate dehydrogenase kinase, thereby promoting the conversion of pyruvate to acetyl-CoA?Which enzyme is responsible for the hydrolysis of triglycerides into fatty acids and glycerol in adipose tissue?Which of the following statements about non-polar amino acids is FALSE?The trp operon in E. coli is a classic example of:Which lipoprotein is responsible for transporting endogenous triglycerides from the liver to peripheral tissues?In eukaryotic cells, which of the following post-transcriptional modifications is essential for mRNA stability and nuclear export?Which of the following is the main enzyme involved in glycogenolysis in muscle tissue?Which signaling lipid is involved in regulating inflammation and pain?In an aqueous solution at physiological pH, which of the following amino acids is most likely to be predominantly protonated?A novel enzyme X is discovered, and its mechanism of action is found to involve the transfer of a phosphate…Which molecule is generated from the cleavage of fructose-1,6-bisphosphate during glycolysis?How does pH affect enzyme activity?Which hormone promotes the breakdown of triglycerides into fatty acids and glycerol for energy production?Which of the following organelles is responsible for the synthesis of proteins?What is the primary transporter of fatty acids in the bloodstream?Which enzyme is responsible for the conversion of acetyl-CoA to malonyl-CoA, a precursor in fatty acid synthesis?In a β-sheet structure, adjacent β-strands can be connected by which of the following interactions?Which of the following enzymes is responsible for the rate-limiting step in cholesterol biosynthesis?Which of the following is a component of phospholipids?Which complex of the electron transport chain directly receives electrons from NADH?Which of the following DNA repair mechanisms is responsible for repairing thymine dimers caused by UV radiation?The main function of enzymes is to:Which of the following molecules is commonly referred to as the "universal energy currency" of the cell?Which of the following tissues can utilize ketone bodies for energy?During gluconeogenesis, glucose is synthesized from:Which of the following is not a component of the transcription process?Which enzyme catalyzes the hydrolysis of ATP?Which step of the citric acid cycle involves a substrate-level phosphorylation?A researcher wants to analyze the disulfide bonds present in a protein. Which of the following methods would be best…Which molecule is the major storage form of fatty acids in adipose tissue?In a reaction catalyzed by an enzyme, the substrate concentration is increased significantly. As a result, the initial velocity of…In the context of tissue-specific metabolism, which of the following is a characteristic feature of brown adipose tissue (BAT)?Which of the following techniques would be most appropriate to determine the tertiary structure of a protein?