This quiz works best with JavaScript enabled. Home > Biochemistry > General > Biochemistry – Quiz 44 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 44 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The basic unit of matter is ..... A) Atom. B) Proton. C) Neutron. D) Electron. Show Answer Correct Answer: A) Atom. 2. Which carbohydrate provides the most bulk to the diet? A) Fructose. B) Lactose. C) Fiber. D) Sucrose. Show Answer Correct Answer: C) Fiber. 3. Water is ..... of your body. A) 60-80%. B) 50%. C) 25%. D) 90-95%. Show Answer Correct Answer: A) 60-80%. 4. These are composed of amino acids. A) Proteins. B) Lipids. C) Carbohydrates. D) Nucleic acids. Show Answer Correct Answer: A) Proteins. 5. How do lipids function for cells? A) Store information. B) Store energy. C) Breakdown wastes. D) Join with substrates. Show Answer Correct Answer: B) Store energy. 6. Which of the following is an organic compound? A) H2O. B) C6H12O6. C) NH2. D) OH. Show Answer Correct Answer: B) C6H12O6. 7. Why does ice float? A) As water freezes, it expands and its density decreases. B) As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy. C) As water freezes, air becomes trapped between the hydrogen bonds of water molecules. D) As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy. Show Answer Correct Answer: A) As water freezes, it expands and its density decreases. 8. When electrons are shared between two atoms, the bond formed is A) Ionic. B) Covalent. C) Hydrogen. D) Peptide. Show Answer Correct Answer: B) Covalent. 9. A large molecule made up of multiple monomers A) Polymer. B) Polysaccharide. C) Macromolecules. D) Protein. Show Answer Correct Answer: A) Polymer. 10. Large bodies of water do not quickly fluctuate in temperature. Why? A) Water is a solvent. B) Water has a high heat capacity. C) Water acts as a buffer. D) Water is non-polar. Show Answer Correct Answer: B) Water has a high heat capacity. 11. What property of water molecules causes surface tension and cohesion? A) Covalent bonds. B) Bent shape. C) All non-metal atoms. D) Polarity. Show Answer Correct Answer: D) Polarity. 12. What forms nitrophenols? A) Red-colored complexes with silver. B) Red-colored complexes with copper. C) Red-colored complexes with mercury. D) Yellow-colored complexes with copper. Show Answer Correct Answer: C) Red-colored complexes with mercury. 13. Molecule 'y' contains chains of amino acids. What is molecule 'y'? A) Nucleotide. B) Protein. C) Adenine. D) Nucleic acid. Show Answer Correct Answer: B) Protein. 14. Which of the following is organic? A) H2O (water). B) O2 (oxygen gas inhaled). C) C6H12O6 (glucose). D) CO2 (carbon dioxide). Show Answer Correct Answer: C) C6H12O6 (glucose). 15. Lactase is an enzyme that has a specific substrate it breaks down called lactose. When lactase breaks down lactose both galactose and ..... are formed as products. A) Fructose. B) Glucose. C) Sucrose. D) Cellulose. Show Answer Correct Answer: B) Glucose. 16. Lipids make up the main components of ..... A) Enzymes. B) Cell membranes. C) Genetic materials. D) Glucose. Show Answer Correct Answer: B) Cell membranes. 17. Which pair of answers correctly matches the monomer and the polymer? A) Glucose- Protein. B) Amino Acid- Nucleic Acid. C) Nucleotide - Nucleic Acid. D) Fatty Acid- DNA. Show Answer Correct Answer: C) Nucleotide - Nucleic Acid. 18. PH of NaOH is ..... A) 11. B) 13. C) 14. D) 4. Show Answer Correct Answer: C) 14. 19. What are the building blocks of carbohydrates called? A) Monosaccharides. B) Disaccharides. C) Polysaccharides. D) Amino Acids. Show Answer Correct Answer: A) Monosaccharides. 20. The central part of an atom that contains the protons and neutron is called? A) Cloud. B) Orbit. C) Nucleus. D) Valency. Show Answer Correct Answer: C) Nucleus. ← 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