This quiz works best with JavaScript enabled. Home > Biochemistry > General > Biochemistry – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 4 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is the "good" cholesterol? A) Starches. B) HDL. C) LDL. D) Amino acids. Show Answer Correct Answer: B) HDL. 2. The building blocks of nucleic acids are called ..... A) Amino acids. B) Nucleotides. C) Carbohydrates. D) Proteins. Show Answer Correct Answer: B) Nucleotides. 3. Which of the following properties explains why water is such an important part of life? (more than one possible answer) A) The fact that water is non polar makes it unable to interact with other molecules causing water to be very stable. B) The ability of water to be attracted to substances other than itself allows for transport of water in plants. C) Water contracts when it freezes, allowing a level of protection to life in a frozen lake or pond. D) Water absorbs a large quantity of heat and changes temperature rapidly. Show Answer Correct Answer: B) The ability of water to be attracted to substances other than itself allows for transport of water in plants. 4. What is an example of a nucleic acid? A) A strand of RNA. B) Vegetable oil. C) Collagen found in human skin. D) A sweet potato. Show Answer Correct Answer: A) A strand of RNA. 5. A compound consists of ..... A) One type of atom bonded to itself. B) Two or more different types of atom bonded to each other. C) Two or more different types of atom mixed with each other. D) All of these. Show Answer Correct Answer: B) Two or more different types of atom bonded to each other. 6. Monomer that forms DNA and has a phosphate group, a sugar, and a nitrogen-containing base A) Amino Acid. B) Nucleotide. C) Fatty Acid. D) Monosaccharide. Show Answer Correct Answer: B) Nucleotide. 7. Molisch reagent may contain which of the following reagents? A) Alpha napthol. B) Thymol. C) Resorcinol. D) All of these. Show Answer Correct Answer: D) All of these. 8. Waxes, oils and fats are examples of A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic Acids. Show Answer Correct Answer: B) Lipids. 9. Cardinals are birds that spend the winter in Maryland. Many people feed them sunflower seeds during the winter months. What are the monomer units of a carbohydrate? A) Amino acid. B) Sugar. C) Fatty acid. D) Nucleotide. Show Answer Correct Answer: B) Sugar. 10. It is considered as the acidity or basicity of a substance A) PH. B) Buffer. C) Electrode. D) Meter. Show Answer Correct Answer: A) PH. 11. Chemical formula for Caffeine is C8H10N4O2, which element in the formula has the most atoms? A) Carbon. B) Hydrogen. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: B) Hydrogen. 12. Which of the following is not one of the main classes of macromolecules within cells? A) Carbohydrates. B) Proteins. C) Nucleic acids. D) Water. Show Answer Correct Answer: D) Water. 13. This type of atomic bonding happens when two or more atoms share electrons. It is the strongest of all the bonding types. A) Covalent Bonds. B) Ionic Bonds. C) Hydrogen Bonds. D) Metallic Bonds. Show Answer Correct Answer: A) Covalent Bonds. 14. The main difference among amino acids is the ..... A) Kind of atom in the center of the molecule. B) Type of bonding involved. C) Number of bonds involved. D) R groups. Show Answer Correct Answer: D) R groups. 15. Which best explains the purpose of the active site of an enzyme? A) The active site is for the attachment of the substrate. B) The active site changes to fit any available substrate. C) The active site determines how many reactions will be catalyzed. D) The active site determines how fast the reaction is allowed to occur. Show Answer Correct Answer: A) The active site is for the attachment of the substrate. 16. A monosaccharide is a subunit of a: A) Nucleic acid. B) Lipid. C) Carbohydrate. D) Protein. Show Answer Correct Answer: C) Carbohydrate. 17. Name the bond that links amino acids together. A) Phosphodiester bond. B) O-Glycosidic bond. C) Peptide bond. D) N-glycosidic bond. Show Answer Correct Answer: C) Peptide bond. 18. What is the negative subatomic particle that orbits the nucleus A) Proton. B) Neutron. C) Electron. D) Voltron. Show Answer Correct Answer: C) Electron. 19. The following are cations, except: A) Bicarbonate. B) Potassium. C) Iron. D) Magnesium,. Show Answer Correct Answer: A) Bicarbonate. 20. Isotopes of the same element differ in which of the following? A) Their number of neutrons. B) Their number of protons. C) Their number of electrons. D) None of above. Show Answer Correct Answer: A) Their number of neutrons. ← PreviousNext →Related QuizzesBiochemistry QuizzesBiochemistry Quiz 1Biochemistry Quiz 2Biochemistry Quiz 3Biochemistry Quiz 5Biochemistry Quiz 6Biochemistry Quiz 7Biochemistry Quiz 8Biochemistry Quiz 9Biochemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books