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Biochemistry — MCQs Biology

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1. The primary function of carbohydrates is to:





2. Proteins are composed of:





3. Lipids are primarily:





4. Enzymes function as:





5. The bond linking amino acids in a protein is called:





6. The basic building block of nucleic acids is:





7. The double helix structure of DNA was proposed by:





8. The main storage form of glucose in animals is:





9. The main storage form of glucose in plants is:





10. Saturated fatty acids:





11. Unsaturated fatty acids:





12. Cholesterol is a type of:





13. The primary structure of a protein is:





14. The secondary structure of a protein includes:





15. The tertiary structure of a protein refers to:





16. The quaternary structure of a protein refers to:





17. Glycolysis occurs in:





18. The end product of glycolysis is:





19. Citric acid cycle occurs in:





20. The final electron acceptor in the electron transport chain is:





21. ATP is produced primarily by:





22. NAD+ and FAD function as:





23. Essential amino acids:





24. Non-essential amino acids:





25. Lipoproteins transport:





26. The major energy currency of the cell is:





27. Enzyme activity can be affected by:





28. Competitive inhibitors:





29. Non-competitive inhibitors:





30. Vitamins often act as:





31. Minerals act as:





32. DNA is composed of:





33. RNA differs from DNA because it:





34. The peptide bond is formed between:





35. Enzyme-substrate complex is formed:





36. The Michaelis constant (Km) represents:





37. Glycogen phosphorylase catalyzes:





38. Lipase catalyzes:





39. Transamination reactions are important for:





40. The main product of beta-oxidation is:





41. Ketone bodies are synthesized in:





42. Lipids include:





43. The enzyme amylase hydrolyzes:





44. The major site of protein digestion in humans is:





45. The major site of lipid digestion is:





46. Hormones like insulin regulate:





47. ATP consists of:





48. Oxidation of glucose to CO₂ and H₂O produces approximately:





49. Coenzyme A is derived from:





50. Glycoproteins are:





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