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 of the following is a condition characterized by the accumulation of excess ammonia in the blood?Which hormone is released during times of stress or low blood glucose levels and mobilizes energy reserves?Which of the following is a metabolic condition characterized by elevated levels of ketone bodies in the blood?In gluconeogenesis, pyruvate is converted to phosphoenolpyruvate (PEP) by the enzyme:Which signaling lipid is involved in promoting fever and inflammation?Which of the following membrane structures is responsible for cell-cell recognition and adhesion?What is the primary purpose of dialysis in protein analysis?Which of the following is a form of reversible enzyme inhibition?Which of the following statements accurately describes the role of microRNAs (miRNAs) in gene expression regulation?What is the function of the cell membrane?Which complex of the electron transport chain receives electrons directly from NADH?According to the Fluid Mosaic Model, how do phospholipids arrange themselves in the lipid bilayer?Which enzyme is responsible for the conversion of cholesterol to bile acids in the liver?Which of the following is a monosaccharide?Which technique is commonly used to detect and quantify proteins in a sample?Which DNA repair mechanism is specifically involved in repairing thymine dimers caused by UV radiation?During aerobic respiration, acetyl-CoA is formed in the mitochondrial matrix. Which of the following transporters is responsible for the transport…The pH at which an amino acid has a net charge of zero is known as its:Which enzyme is responsible for the final step in fatty acid synthesis, attaching the newly synthesized fatty acid to a…Which of the following statements accurately describes the role of ATP in biosynthetic reactions?Which of the following best describes the ring structure of a cyclic sugar molecule?During prolonged fasting, what is the primary organ responsible for the synthesis of ketone bodies?What is the purpose of using a vector in recombinant DNA technology?Which of the following techniques would be most appropriate to determine the tertiary structure of a protein?Inhibition of which of the following enzymes would result in an accumulation of citrate in the mitochondrial matrix, ultimately leading…In a reaction catalyzed by an enzyme, the substrate concentration is increased significantly. As a result, the initial velocity of…Which of the following membranes is responsible for the production of steroid hormones?Which molecule is the major storage form of fatty acids in adipose tissue?During an experiment, it is observed that a membrane-bound enzyme is more active when the membrane is enriched with unsaturated…Which lipoprotein is considered the "bad cholesterol" due to its association with cardiovascular disease?The pKa values of the ionizable groups of cysteine are approximately 1.9 and 10.8. At what pH would the concentration…Which of the following best describes the role of histones in eukaryotic cells?How are eukaryotic chromosomes organized within the nucleus?The tertiary structure of a protein refers to:Which of the following is NOT a type of secondary structure found in proteins?During glycogen synthesis, glucose is added to the growing glycogen chain in the form of:Which tissue is responsible for the synthesis and storage of glycogen?A competitive inhibitor:During the fasted state, which hormone promotes glycogenolysis and gluconeogenesis to increase blood glucose levels?The primary structure of a protein is determined by:Which of the following membranes contains enzymes involved in oxidative phosphorylation?Which of the following statements accurately describes the first law of thermodynamics?A peptide bond is formed between:Which molecule serves as the final electron acceptor in the reduction of NAD+ to NADH during glycolysis?Which of the following best defines a monosaccharide?In the biosynthesis of glycosaminoglycans (GAGs), which of the following molecules serves as a common precursor for the synthesis of…Which lipoprotein carries endogenous cholesterol from the liver to peripheral tissues?Which amino acid is specified by the start codon AUG?In a eukaryotic cell, which of the following accurately describes the process of mRNA splicing?Which of the following enzymes is responsible for the initial step in protein catabolism within the human digestive system?