This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 21 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the monomer units of a nucleic acid? A) Amino Acid. B) Fatty Acid. C) Nucleotide. D) Sugar. Show Answer Correct Answer: C) Nucleotide. 2. The human body stores sugar (in muscles & liver) in the form of - A) Cellulose. B) Starch. C) Glycogen. D) Glucose. Show Answer Correct Answer: C) Glycogen. 3. In a closed thermodynamic system, ..... A) The transfer of energy take place but the transfer of temperature or mass does not take place. B) The transfer of both energy and temperature or mass take. C) Cannot exchange both energy and mass with its surroundings. D) None of above. Show Answer Correct Answer: A) The transfer of energy take place but the transfer of temperature or mass does not take place. 4. Which is an example of a carbohyrdate? A) Wax. B) DNA. C) Red meat. D) Bread. Show Answer Correct Answer: D) Bread. 5. Enzymes are composed of what organic molecule? A) Sugars. B) Fatty Acids. C) DNA. D) Proteins. Show Answer Correct Answer: D) Proteins. 6. DNA and RNA are made up of nucleotides. Each nucleotide is composed of ..... A) Sugar, nitrogenous base and an acid. B) Sugar, nitrogenous base and a phosphate group. C) Sugar, ATP, and a phosphate group. D) Amino acids. Show Answer Correct Answer: B) Sugar, nitrogenous base and a phosphate group. 7. Vitamin C is present in: A) Tomatoes. B) Papaya. C) Guava. D) All of the above. Show Answer Correct Answer: D) All of the above. 8. Which organic molecule is paired with its function? A) Proteins:to provide insulation. B) Lipids:to regulate metabolic processes. C) Nucleic acid:to store energy. D) Carbohydrate:to provide quick-release energy. Show Answer Correct Answer: D) Carbohydrate:to provide quick-release energy. 9. Which of the following is NOT a B Vitamin? A) Folid Acid. B) B 1. C) B 36. D) B 12. Show Answer Correct Answer: C) B 36. 10. Starch and glycogen are important polysaccharides. In what way are they different? A) Starch is soluble in water while glucose is not. B) Starch is composed of cellulose while glycogen is composed of glucose. C) Glycogen is found in animals while starch is found in plants. D) They both function as a source of energy. Show Answer Correct Answer: C) Glycogen is found in animals while starch is found in plants. 11. Symbiotic Nitrogen Fixers create an anaerobic environment with the help of ..... A) Dinitrogenase. B) Leghemoglobin. C) Hemoglobin. D) Nodulin. Show Answer Correct Answer: B) Leghemoglobin. 12. Which of the following sugars will not test positive in Molisch's test? A) Triose. B) Aldohexose. C) Ketohexose. D) Pentose. Show Answer Correct Answer: A) Triose. 13. Which of these amino acids contains sulphur? A) Lysine. B) Alanine. C) Proline. D) Cysteine. Show Answer Correct Answer: D) Cysteine. 14. The maintenance of constant internal body conditions is referred to as which of the following terms? A) Neturalizing. B) Osmoregultion. C) Homeostasis. D) Buffering. Show Answer Correct Answer: C) Homeostasis. 15. Which of the following molecule can be used as a substrate for gluconeogenesis? A) Lipoproteins. B) DNA. C) Maltose. D) Glycerol. Show Answer Correct Answer: D) Glycerol. 16. The basic building blocks (monomers) of proteins are: A) Triglycerides. B) Amino acids. C) Monosaccharides. D) Nucleotides. Show Answer Correct Answer: B) Amino acids. 17. Capillary Action A) The property of water that allows ice to float on the surface of liquid water. B) The property of water that allows it to dissolve polar substances. C) When water molecules stick to other surfaces. D) The property of water that allows water to move up a thin tube (or the stem of a plant) by itself. Show Answer Correct Answer: D) The property of water that allows water to move up a thin tube (or the stem of a plant) by itself. 18. Glucose stored in plants is commonly called ..... A) Starch. B) Glycogen. C) Yeast. D) None of above. Show Answer Correct Answer: A) Starch. 19. The type of polysaccharide which serves as a strengthening tissue in the cell wall of plants is A) Fructose. B) Lactose. C) Glucose. D) Cellulose. Show Answer Correct Answer: D) Cellulose. 20. Fluoride inhibits which enzyme? A) Cytochrome oxidase. B) Cysteic acid. C) Enolase. D) Transolase. Show Answer Correct Answer: C) Enolase. 21. Who helps clot the bleeds? A) Vitamin E. B) Vitamin A. C) Vitamin K. D) Vitamin C. Show Answer Correct Answer: C) Vitamin K. 22. Charged particles are called ..... A) Ions. B) Elements. C) Atoms. D) Compounds. Show Answer Correct Answer: A) Ions. 23. It is needed for cellular and macrocellular syntheses? A) Vit. K. B) Vit. B12. C) Vit. E. D) Biotin. Show Answer Correct Answer: C) Vit. E. 24. What type of reaction is shown below?glucose + fructose < ..... sucrose + water A) Dehydrolysis. B) Dehydration. C) Hydrolysis. D) Covalent. Show Answer Correct Answer: C) Hydrolysis. 25. The shape of the peptide is A) Maintained by bonding between parts of the polypeptide. B) Ultimately dependent on the primary structure. C) Necessary to function. D) All of the above. Show Answer Correct Answer: D) All of the above. 26. Steroids are an example of which biomolecule? A) Carbohydrates. B) Nucleic acids. C) Lipids. D) Proteins. Show Answer Correct Answer: C) Lipids. 27. What are the monomer units of a lipid? A) Nucleotide. B) Fatty acid. C) Sugar. D) Amino Acid. Show Answer Correct Answer: B) Fatty acid. 28. What are the monomer units of a carbohydrate? A) Amino Acid. B) Sugar. C) Starch. D) Nucleotide. Show Answer Correct Answer: B) Sugar. 29. It is an enzyme that catalyzes the removal of water from a compound. A) Anhydrase. B) Carbonic anhydrase. C) Catalyst enzyme. D) Carbonic enzyme. Show Answer Correct Answer: A) Anhydrase. 30. Particles in an atom that are neutral and have no charge are ..... A) Protons. B) Negatrons. C) Electrons. D) Neutrons. Show Answer Correct Answer: D) Neutrons. ← 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