This quiz works best with JavaScript enabled. Home > Biochemistry > Biochemistry – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 42 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a biuret reaction? A) A colour reaction. B) A denaturation reaction. C) An oxydation reaction. D) A reduction reaction. Show Answer Correct Answer: A) A colour reaction. 2. If Carbon's atomic number is 6, how many protons Carbon have? A) 4. B) 2. C) 6. D) 7. Show Answer Correct Answer: C) 6. 3. You should eat grains ..... a day A) 4 or more a day. B) 5 or more a day. C) 6 or more a day. D) 7 or more a day. Show Answer Correct Answer: C) 6 or more a day. 4. Which one of the following will test negative for Iodine test? A) Glycogen. B) Starch. C) Cellulose. D) Amylose. Show Answer Correct Answer: C) Cellulose. 5. Which of the following does water NOT do? A) Lubricant. B) Dissociates substances. C) Energy molecule. D) Essential component of metabolism. Show Answer Correct Answer: C) Energy molecule. 6. Alli is having a problem with her hair and nails becoming fragile and breaking easily. She went to the store to buy vitamins to help her, but is unsure of what type of supplement she needs. Which macromolecule should Alli look for on the vitamin labels? A) Carbohydrate. B) Nucleic acid. C) Lipid. D) Protein. Show Answer Correct Answer: D) Protein. 7. Which chemical is classified as an enzyme? A) Galactose. B) Lipid. C) Protease. D) Manganese dioxide. Show Answer Correct Answer: C) Protease. 8. All carbohydrates are: A) Made of amino acids. B) Composed of carbon, hydrogen and oxygen atoms. C) Made of fatty acids. D) Composed of carbon, hydrogen, oxygen and nitrogen atoms. Show Answer Correct Answer: B) Composed of carbon, hydrogen and oxygen atoms. 9. You suspect that a chemical that you are testing in the lab is strongly acidic. What might be its pH? A) 14. B) 11. C) 7. D) 2. Show Answer Correct Answer: D) 2. 10. All of the following are examples of lipids except: A) Oil. B) Wax. C) Fatty acid. D) Cellulose. Show Answer Correct Answer: D) Cellulose. 11. What do carbohydrates provide for the body? A) Helps build and repair body tissue. B) Helps hydrate your body. C) Provides your body's main source of energy. D) Helps vital processes. Show Answer Correct Answer: C) Provides your body's main source of energy. 12. Even though human proteins are synthesized from only 20 different amino acids, there are thousands of different proteins found in human cells. This great variety of proteins is possible because the A) Size of a specific amino acid can vary within a protein. B) Chemical composition of a specific amino acid can vary. C) Sequence and number of amino acids can be different in each protein. D) Same amino acid can have many different properties. Show Answer Correct Answer: C) Sequence and number of amino acids can be different in each protein. 13. What does hydrolysis mean? A) Breaking of water molecules. B) Formation by water. C) Splitting by water. D) Getting rid of water molecules. Show Answer Correct Answer: C) Splitting by water. 14. What is the function of an enzyme? A) Enzymes break themselves into small pieces. B) Enzymes slow down chemical reactions. C) Enzymes speed up chemical reactions. D) Enzymes combine products to form reactants. Show Answer Correct Answer: C) Enzymes speed up chemical reactions. 15. An example of a carbohydrate is ..... A) Butter. B) Cheese. C) Steak. D) Bread. Show Answer Correct Answer: D) Bread. 16. Examples of lipids are ..... A) Hair, Skin, Fingernails. B) Fats, Waxes, Oils. C) DNA, RNA. D) Sugars, Cell Wall. Show Answer Correct Answer: B) Fats, Waxes, Oils. 17. A scientist analyzing an unknown substance has determined that it consists only of carbon, hydrogen and oxygen. During experimentation, she determines that the substance is soluble, or dissolves, in OIL but not in water. Which of the following macromolecules is the unknown substance most likely to be? A) Carbohydrate. B) Lipid. C) Nucleic acid. D) Protein. Show Answer Correct Answer: B) Lipid. 18. Which of the following is not a mineral? A) Iron. B) Zinc. C) Starch. D) Flouride. Show Answer Correct Answer: C) Starch. 19. What is the monomer of proteins? A) Amino acids. B) Polypeptides. C) Nucleotides. D) Monosaccharides. Show Answer Correct Answer: A) Amino acids. 20. These are converted to glucose for use by body cells A) Fructose. B) Ribose. C) Galactose. D) Deoxyribose. Show Answer Correct Answer: C) Galactose. ← PreviousNext →Related QuizzesBiochemistry Quiz 1Biochemistry Quiz 2Biochemistry Quiz 3Biochemistry Quiz 4Biochemistry Quiz 5Biochemistry Quiz 6Biochemistry Quiz 7Biochemistry Quiz 8Biochemistry Quiz 9Biochemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books