This quiz works best with JavaScript enabled. Home > Biochemistry > Biochemistry – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 21 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Lactose is composed of A) Glucose + fructose. B) Glucose + glucose. C) Glucose + sucrose. D) Glucose + galactose. Show Answer Correct Answer: D) Glucose + galactose. 2. Fatty acids such as butter and oils and phospholipids are examples of this organic molecule: A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic Acids. Show Answer Correct Answer: B) Lipids. 3. When these bond together, they form a protein A) Amino Acids. B) Peptide Bonds. C) Ribose. D) Nucleotides. Show Answer Correct Answer: A) Amino Acids. 4. What makes up a protein? A) Monosaccharide. B) Amino Acid. C) Disaccharide. D) Fatty Acid. Show Answer Correct Answer: B) Amino Acid. 5. Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why? A) The insects are light enough so they do not break the hydrogen bonds holding the water molecules together (cohesion). B) The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet. C) The insect's feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface. D) The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next. Show Answer Correct Answer: A) The insects are light enough so they do not break the hydrogen bonds holding the water molecules together (cohesion). 6. ATP is called a cell's "energy currency" because A) ATP catalyzes all metabolic reactions. B) Most of the energy that drives metabolism is supplied by ATP. C) Glucose is made of ATP. D) ATP allows one organelle to be exchanged for another between cells. Show Answer Correct Answer: B) Most of the energy that drives metabolism is supplied by ATP. 7. What type of substance is made up of atoms held together by covalent bonds? A) Ion. B) Molecule. C) Isotope. D) Element. Show Answer Correct Answer: B) Molecule. 8. Proteins have many different functions in a cell. Which of the following are possible functions of a protein? A) Catalysts and building blocks of DNA. B) Enzymes and actively transports molecules across the cell membrane. C) Building blocks of DNA and structural components of cell membrane. D) Components of the cell membrane and main source of energy in cellular respiration. Show Answer Correct Answer: B) Enzymes and actively transports molecules across the cell membrane. 9. Monosaccharides are the monomers for which major macromolecules? A) Photosythesis. B) Monosaccharides. C) Carbohydrates. D) None of above. Show Answer Correct Answer: C) Carbohydrates. 10. Proteins are compounds formed in the cells of plants and animals. Which element is included in every protein molecule? A) Calcium. B) Carbon. C) Fluorine. D) Sodium. Show Answer Correct Answer: B) Carbon. 11. Dopamine and Epinephrine are derived from: A) Tryptophan. B) Glutamic acid. C) Valine. D) Tyrosine. Show Answer Correct Answer: D) Tyrosine. 12. What is the ratio carbon:hydrogen:oxygen in carbohydrates? A) 1:1:1. B) 1:2:1. C) 2:1:1. D) 2:1:2. Show Answer Correct Answer: B) 1:2:1. 13. What determines the code, or information, of a DNA molecule? A) The shape (structure) of the nitrogen bases. B) The order (sequence) of the nitrogen bases. C) The color of the nitrogen bases. D) The frequency (number) of nitrogen bases. Show Answer Correct Answer: B) The order (sequence) of the nitrogen bases. 14. Disaccharides - A) Glucose. B) Sucrose. C) Glycogen. D) Fructose. Show Answer Correct Answer: B) Sucrose. 15. ..... = energy storage for animals in liver & muscles A) Starch. B) Glycogen. C) Cellulose. D) Chitin. Show Answer Correct Answer: B) Glycogen. 16. Why do lipids provide longer lasting energy than Carbohydrates? A) They have many more C-H bonds. B) They have fewer C-H bonds. C) They have more Oxygen. D) They have less Oxygen. Show Answer Correct Answer: A) They have many more C-H bonds. 17. Which of the following processes generates the most ATP? A) Citric acid cycle. B) Fatty acid oxidation. C) Glycogenolysis. D) Glycolysis. Show Answer Correct Answer: B) Fatty acid oxidation. 18. It serve as a minicirculatory system for the cell because it provides a network of channels for carrying substances from one part of the cell to another A) Ribosomes. B) Endoplasmic reticulum. C) Nucleus. D) Golgi Apparatus. Show Answer Correct Answer: B) Endoplasmic reticulum. 19. The three elements that make up most of all 4 types of macromolecules A) Water, Oxygen, & Hydrogen. B) Carbon, Hydrogen, & Oxygen. C) Nitrogen, Hydrogen, & Oxygen. D) Nitrogen, Phosphorus, & Sulfur. Show Answer Correct Answer: B) Carbon, Hydrogen, & Oxygen. 20. An anthocyanin found in cabbage is used as a indicator in pH papers is called ..... A) Flavone. B) Flavin. C) Flavine. D) Flaveine. Show Answer Correct Answer: B) Flavin. ← 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