Tri 1 Biochem Past Exams Questions and Answers Already Passed
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Tri 1 Biochem
Institution
Tri 1 Biochem
Tri 1 Biochem Past Exams Questions
and Answers Already Passed
What is the role of zinc in enzyme function?
Zinc acts as a cofactor, stabilizing the structure of enzymes and aiding in catalysis.
Which type of bond forms between the amino group of one amino acid and the carboxyl group of
an...
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Tri 1 Biochem Past Exams Questions
and Answers Already Passed
What is the role of zinc in enzyme function?
✔✔ Zinc acts as a cofactor, stabilizing the structure of enzymes and aiding in catalysis.
Which type of bond forms between the amino group of one amino acid and the carboxyl group of
another?
✔✔ A peptide bond forms between the amino and carboxyl groups, linking amino acids together.
How do enzymes use the lock-and-key model to explain substrate binding?
✔✔ The lock-and-key model suggests that enzymes have specific active sites (locks) that fit only
certain substrates (keys).
What distinguishes a purine from a pyrimidine in nucleic acids?
✔✔ Purines have a two-ring structure (adenine and guanine), while pyrimidines have a single-
ring structure (cytosine, thymine, and uracil).
What is the function of chaperone proteins in the cell?
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,✔✔ Chaperone proteins assist in the proper folding of other proteins, preventing aggregation and
misfolding.
How do lipids contribute to membrane structure?
✔✔ Lipids form a bilayer that acts as a barrier, allowing selective permeability and maintaining
cellular integrity.
What type of reaction converts a disaccharide into two monosaccharides?
✔✔ Hydrolysis is the reaction that splits a disaccharide into two monosaccharides by adding
water.
What is the primary purpose of the Krebs cycle in cellular respiration?
✔✔ The Krebs cycle generates electron carriers (NADH and FADH2) and ATP through the
oxidation of acetyl-CoA.
How do post-translational modifications affect proteins?
✔✔ Post-translational modifications can alter protein function, localization, and activity by
adding or removing chemical groups.
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, What is the significance of the Michaelis-Menten equation in enzyme kinetics?
✔✔ The Michaelis-Menten equation describes the relationship between substrate concentration
and reaction velocity, helping to understand enzyme efficiency.
Which amino acid is known for introducing kinks in protein structure?
✔✔ Proline introduces kinks in protein structure due to its unique cyclic structure.
What is the function of glycoproteins in cell recognition?
✔✔ Glycoproteins serve as recognition signals on cell surfaces, playing a crucial role in cell-cell
interactions.
How does the structure of fatty acids influence their function in the body?
✔✔ The saturation level and length of fatty acids affect their fluidity, energy storage, and roles
in signaling pathways.
What role do lipoproteins play in lipid transport?
✔✔ Lipoproteins transport lipids through the bloodstream, aiding in the distribution of fats and
cholesterol.
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