This quiz works best with JavaScript enabled. Home > Biochemistry > General > Biochemistry – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 28 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Find the correct law related to "Energy can neither be created nor destroyed, but it can be changed from one form to another" A) Zeroth law. B) First law. C) Second law. D) Third law. Show Answer Correct Answer: B) First law. 2. In a covalent bond, atoms A) Share electrons. B) Transfer electrons. C) Attract water molecules to each other. D) Do not bond. Show Answer Correct Answer: A) Share electrons. 3. A monosaccharide is a: A) Nucleic acid. B) Lipid. C) Carbohydrate. D) Protein. Show Answer Correct Answer: C) Carbohydrate. 4. What are the repeating units that form a DNA molecule? A) Fatty acids. B) Nucleotides. C) Amino Acids. D) Chromosomes. Show Answer Correct Answer: B) Nucleotides. 5. DNA and RNA are examples of ..... A) Proteins. B) Nucleic acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: B) Nucleic acids. 6. Why is the "lock and key" analogy often used to describe enzymefunction? A) Each enzyme is the same as its substrate. B) Each enzyme will fit with only one specific kind of substrate. C) Each enzyme can only be used once in a reaction and cannot be usedagain. D) Each enzyme has its own active site that will not fit with other activesites. Show Answer Correct Answer: B) Each enzyme will fit with only one specific kind of substrate. 7. Glucose enters cells and is committed to glycolysis with the addition of: A) PFK Enzymes. B) -PO4 from ADP. C) -PO4 from ATP. D) Electrons from ATP. Show Answer Correct Answer: C) -PO4 from ATP. 8. You are analyzing a compound in the lab and you find it's made up of carbon, hydrogen and oxygen in a ratio of C6H12O6. How would you classify the compound? A) Carbohydrate. B) Lipid. C) Protein. D) Nucleic acid. Show Answer Correct Answer: A) Carbohydrate. 9. Which biomolecule is the main source of short term energy? A) Carbohydrate. B) Lipid. C) Nucleic acid. D) Protein. Show Answer Correct Answer: A) Carbohydrate. 10. Which of the following is the process used to bond the monomers together? A) Hydrolysis. B) Water Removal. C) Dehydration Synthesis. D) Water Synthesis. Show Answer Correct Answer: C) Dehydration Synthesis. 11. Carbohydrates are more easily metabolized than lipids. However, on a gram-for-gram basis lipids provide cells with more- A) Nitrogen. B) Proteins. C) Structure. D) Energy. Show Answer Correct Answer: D) Energy. 12. What color changes the biuret reacton in the presence of NaOH and sodium-potassium tetrate? A) From blue to brown. B) From blue to green. C) From blue to red. D) From blue to purple. Show Answer Correct Answer: D) From blue to purple. 13. Guanine bonds with ..... A) Adenine. B) Guanine. C) Cytosine. D) Thymine. Show Answer Correct Answer: C) Cytosine. 14. Which is not a use or function of protein? A) Forms enzymes and hormones. B) Forms transport channel in cell membrane. C) Forms structural proteins in the body. D) Quick energy. Show Answer Correct Answer: D) Quick energy. 15. This polysaccharide is referred to as dietary fiber; helps aid in the digestive process in animals and humans. A) Cellulose. B) Starch. C) Triglyceride. D) Glycogen. Show Answer Correct Answer: A) Cellulose. 16. ..... are the main source of energy for cells. A) Proteins. B) Lipids. C) Nucleic acids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 17. Which of the following properties of water enables it to move from the roots to the leaves of plants? A) Water expands as it freezes. B) Water is an excellent solvent. C) Water exhibits cohesive and adhesive behavior. D) Water moderates temperature. Show Answer Correct Answer: C) Water exhibits cohesive and adhesive behavior. 18. Amino acids are joined together by chemical bonds. When these bonds are broken, the process is called A) Coagulation. B) Gelatinisation. C) Denaturation. D) Shortening. Show Answer Correct Answer: C) Denaturation. 19. A bond that is formed when a electron is transferred to form ions A) Ionic Bond. B) Covalent Bond. C) Metallic Bond. D) Barry Bonds. Show Answer Correct Answer: A) Ionic Bond. 20. Where do substrates bind on an enzyme? A) Voltage-gated channels. B) Surface receptor. C) Calcium channels. D) Active site. Show Answer Correct Answer: D) Active site. ← PreviousNext →Related QuizzesBiochemistry QuizzesBiochemistry Quiz 1Biochemistry Quiz 2Biochemistry Quiz 3Biochemistry Quiz 4Biochemistry Quiz 5Biochemistry Quiz 6Biochemistry Quiz 7Biochemistry Quiz 8Biochemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books