This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 18 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which statement about enzymes in NOT true? A) Enzymes are composed of polypeptide chains. B) Enzymes form a temporary bond with a reactant. C) Enzymes are destroyed when they are used and must be made each time a reaction takes place. D) Each enzyme is specific because of its shape and catalyzes only certain reactions. Show Answer Correct Answer: C) Enzymes are destroyed when they are used and must be made each time a reaction takes place. 2. Which pair is incorrect? A) Nucleic acids - store hereditary information. B) Carbohydrates - provide energy. C) Proteins - provide energy. D) Lipids - provide insulation. Show Answer Correct Answer: C) Proteins - provide energy. 3. A(n) ..... is the part of the enzyme the substrate fits into. A) Active site. B) Substrate. C) Enzyme. D) Product. Show Answer Correct Answer: A) Active site. 4. Which of the following is not a disachcharide? A) Maltose. B) Lactose. C) Sucrose. D) Fructose. Show Answer Correct Answer: D) Fructose. 5. Which of the following macromolecules are responsible for speeding up chemical reactions? A) Proteins. B) Nucleic acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: A) Proteins. 6. An atom with atomic number 6 would have how many protons? A) Cannot be determined. B) 6. C) 12. D) 3. Show Answer Correct Answer: B) 6. 7. WHO made a model of the DNA molecule with two strands wound around each other called a double helix? A) Chargaff. B) Hershey and Chase. C) Avery. D) Watson & Crick. Show Answer Correct Answer: D) Watson & Crick. 8. What is a substance in which the atoms of two are more elements are combined in a fixed proportion? A) Elements. B) Quarks. C) Compounds. D) Atoms. Show Answer Correct Answer: C) Compounds. 9. Enzymes and hormones are both examples of: A) Nucleic acids. B) Lipids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: C) Proteins. 10. When Tyrosine is found in a protien A) The protien gives blue color withlead acetate. B) The protien gives red color with Hopkins Cole. C) The protien gives red color with Millon's. D) The protien gives blue color with Millon's. Show Answer Correct Answer: C) The protien gives red color with Millon's. 11. ..... are the building blocks of life. A) Atoms. B) Nutrients. C) Solids. D) Gases. Show Answer Correct Answer: A) Atoms. 12. Where in our cells does translation occur? A) Nucleus. B) Chloroplast. C) Mitochondria. D) Ribosome. Show Answer Correct Answer: D) Ribosome. 13. Proteins are compose of the elements ..... A) C, H, O. B) C, H, O, P. C) C, H, O, N. D) C H, O P, N. Show Answer Correct Answer: C) C, H, O, N. 14. Covalent compounds A) Contain a sea of electrons. B) Conduct electricity. C) Share electrons. D) Transfer electrons. Show Answer Correct Answer: C) Share electrons. 15. Movement:Makes up muscle tissue (Actin and Myosin)Transport:Carries oxygen in organisms (Hemoglobin) Immunity:Helps fight off foreign invaders (Antibodies) Enzymes:Speed up chemical reactionsSmall source of energy A) Functions of proteins. B) Functions of lipids. C) Functions of carbohydrates. D) Functions of nucleic acids. Show Answer Correct Answer: A) Functions of proteins. 16. How many atoms/elements are in H3? A) 0. B) 3. C) 1. D) 2. Show Answer Correct Answer: B) 3. 17. Glycolysis results in the net gain of: A) 2 Acetyl CoA. B) 4 NADH. C) 2 ATP. D) 4 ATP. Show Answer Correct Answer: C) 2 ATP. 18. The energy needed to start a reaction A) Adhesion energy. B) Activation energy. C) Chemical energy. D) Cohesion energy. Show Answer Correct Answer: B) Activation energy. 19. . What is it called when one strain of bacteria is CHANGED by a gene Translation Mutation Transformation Hox Gene A) Transformation. B) Mutation. C) Translation. D) Hox Gene. Show Answer Correct Answer: A) Transformation. 20. How many atoms/elements in K? A) 1. B) 3. C) 0. D) 2. Show Answer Correct Answer: A) 1. 21. In ....., either amino acid or carbohydrate monomers bond together. A) Hydrogen bonding. B) Hydrolysis. C) Dehydration synthesis. D) Phosphodiester bonding. Show Answer Correct Answer: C) Dehydration synthesis. 22. 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. 23. In a covalent bond, atoms A) Transfer electrons. B) Attract water molecules to each other. C) Do not bond. D) Share electrons. Show Answer Correct Answer: D) Share electrons. 24. A monosaccharide is a: A) Lipid. B) Protein. C) Nucleic acid. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. 25. What are the repeating units that form a DNA molecule? A) Chromosomes. B) Nucleotides. C) Fatty acids. D) Amino Acids. Show Answer Correct Answer: B) Nucleotides. 26. DNA and RNA are examples of ..... A) Lipids. B) Proteins. C) Nucleic acids. D) Carbohydrates. Show Answer Correct Answer: C) Nucleic acids. 27. 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. 28. Glucose enters cells and is committed to glycolysis with the addition of: A) PFK Enzymes. B) Electrons from ATP. C) -PO4 from ADP. D) -PO4 from ATP. Show Answer Correct Answer: D) -PO4 from ATP. 29. 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) Protein. C) Nucleic acid. D) Lipid. Show Answer Correct Answer: A) Carbohydrate. 30. Which biomolecule is the main source of short term energy? A) Nucleic acid. B) Protein. C) Lipid. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. ← 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