This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 15 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. All but one are the physicochemical nature of enzymes: A) They are water soluble. B) Work best at temperatures between 35-40*C. C) Have unique characteristics such as shape, specificity, and function. D) Are used up or permanently changed by the reaction. Show Answer Correct Answer: D) Are used up or permanently changed by the reaction. 2. Which lipid polymer is primary responsible for storing long-term energy in plants and animals? A) Triglycerides. B) Steroids. C) Phospholipids. D) Meat. Show Answer Correct Answer: A) Triglycerides. 3. A general definition of cohesion is the attraction of: A) Particles of the same substance. B) Particles of a different substance. C) Particles of both the same and different substances. D) Particles of neither the same or different substances. Show Answer Correct Answer: A) Particles of the same substance. 4. The metabolic machinery of the cell A) Inclusions. B) Organelles. C) Mitochondria. D) Lysosomes. Show Answer Correct Answer: B) Organelles. 5. Which of the following statements is true? RNA contains deoxyribose A) DNA is single-stranded. B) RNA is single-stranded. C) DNA contains uracil. D) RNA contains deoxyribose. Show Answer Correct Answer: B) RNA is single-stranded. 6. The polymer of monosaccharides are called ..... A) Glycerol and fatty acids. B) Nucleotides. C) Amino Acids. D) Polysaccharides. Show Answer Correct Answer: D) Polysaccharides. 7. Which type of food gives you the most proteins? A) Salad and spaghetti. B) Steak and shrimp. C) Cheese and avocados. D) Peanut butter. Show Answer Correct Answer: B) Steak and shrimp. 8. The structure of biomolecules is closely related to the functions they perform in living cells. Which statement below best illustrates this concept? A) The active site of a protein enzyme precisely fits the shape of its substrate molecules. B) Lipids may be saturated or unsaturated. C) Proteins may be made up of chains that are folded or coiled. D) Carbohydrates such as starch are long chains of sugar monomers. Show Answer Correct Answer: A) The active site of a protein enzyme precisely fits the shape of its substrate molecules. 9. Gibbes free energy? A) G=H+TS. B) G=H/TS. C) G=H-TS. D) G=H-T/S. Show Answer Correct Answer: C) G=H-TS. 10. When water freezes the molecules form a matrix by forming hydrogen bonds and A) Becomes less dense than water. B) Becomes more dense than water. C) Sinking in water. D) Becoming more tightly packed. Show Answer Correct Answer: A) Becomes less dense than water. 11. Which of the following is not a requirement for glycolysis? A) ATP. B) Oxygen. C) NAD+. D) Glucose. Show Answer Correct Answer: B) Oxygen. 12. ..... are some functions of lipids. A) Storing energy and cell membrane structure. B) Providing actin & providing myosin. C) Cellulose structure and digestive assistance. D) Storing & transferring genetic info. Show Answer Correct Answer: A) Storing energy and cell membrane structure. 13. The basic unit of any molecule; The six common ones necessary for life are CHONPS A) Compound. B) Polymer. C) Element. D) Monomer. Show Answer Correct Answer: C) Element. 14. What is the ratio of hydrogen to oxygen in carbohydrates? A) 1:1. B) 4:1. C) 2:1. D) 3:1. Show Answer Correct Answer: C) 2:1. 15. Substances that have a pH of 7 are considered: A) Acidic. B) Basic. C) Neutral. D) None of above. Show Answer Correct Answer: C) Neutral. 16. What is the pOH of a solution that has a pH of 2? A) 12. B) 1. C) 14. D) 10. Show Answer Correct Answer: A) 12. 17. All but one are examples of Proteases? A) Pepsin. B) Rennin. C) Trypsin. D) Tyrosinase. Show Answer Correct Answer: D) Tyrosinase. 18. Which of the following subatomic particles are used between atoms to create molecules? A) Protons. B) Electrons. C) Neutrons. D) None of above. Show Answer Correct Answer: B) Electrons. 19. Nutrients that build and repair tissues and cells e.g. meat, milk, eggs. A) Protein. B) Fat. C) Minerals. D) Vitamins. Show Answer Correct Answer: A) Protein. 20. How many molecules are required to hydrolyze a polymer that is 10 monomers long? A) 9. B) 1. C) 10. D) 5. Show Answer Correct Answer: A) 9. 21. In the process of ..... polymers can be broken down into monomer pieces by the addition of water. A) Condensation Cutting. B) Hydrolysis. C) Dehydration Synthesis. D) Pyrolysis. Show Answer Correct Answer: B) Hydrolysis. 22. What is the function of carbohydrates in your body? A) Speed up chemical reactions. B) Give immediate energy. C) Help to store energy. D) Build cell walls in plants. Show Answer Correct Answer: B) Give immediate energy. 23. To which class of organic compounds do enzymes belong? A) Nucleic acids. B) Proteins. C) Monosaccharides. D) Fatty acids. Show Answer Correct Answer: B) Proteins. 24. The pH of most of your body fluids would be - A) 6.5-7.5. B) 3-4. C) 9-11. D) 12-14. Show Answer Correct Answer: A) 6.5-7.5. 25. Enzyme that catalyses the transfer of functional group of atoms from one molecule to another. This enzyme is A) Isomerases. B) Transferases. C) Lyases. D) Oxidoreductase. Show Answer Correct Answer: B) Transferases. 26. Each enzyme only has 1 substrate that will fit its active site. What is this called? A) Fragile. B) Reusable. C) Catalyst. D) Specific. Show Answer Correct Answer: D) Specific. 27. All polymers are made up of ..... A) Monosaccharides. B) Monomers. C) Proteins. D) None of these. Show Answer Correct Answer: B) Monomers. 28. It is responsible for the production of energy in the form of ATP. A) Peroxisomes. B) Nucleus. C) Mitchondria. D) Lysosomes. Show Answer Correct Answer: C) Mitchondria. 29. What is an example of a carbohydrate? A) Steak. B) Pasta. C) Chicken. D) Fish. Show Answer Correct Answer: B) Pasta. 30. Which of the following options is NOT true of the enzyme lactase? A) Lactase breaks down lactose into galactose and glucose. B) Lactase speeds up the breaking down of lactose. C) Lactase has a specific substrate called lactose. D) Lactase is an enzyme that can break down multiple sugars. Show Answer Correct Answer: D) Lactase is an enzyme that can break down multiple sugars. ← PreviousNext →Related QuizzesBiochemistry QuizzesAgriculture QuizzesBiochemistry Quiz 1Biochemistry Quiz 2Biochemistry Quiz 3Biochemistry Quiz 4Biochemistry Quiz 5Biochemistry Quiz 6Biochemistry Quiz 7Biochemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books