This quiz works best with JavaScript enabled. Home > Biochemistry > Biochemistry – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 31 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Phospholipid tails face ....., while the heads face ..... A) The water, the center. B) Left, right. C) The center, the water. D) Up, down. Show Answer Correct Answer: C) The center, the water. 2. What are the main atoms of a protein molecule? A) Carbon, hydrogen, nitrogen, and oxygen. B) Nitrogen, oxygen, and phosphorous. C) Oxygen, sulfur, and nitrogen. D) Carbon, phosphorous, and hydrogen. Show Answer Correct Answer: A) Carbon, hydrogen, nitrogen, and oxygen. 3. Water is polar because ..... A) The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. B) The molecule has two poles, at which the it is colder than other regions of the molecule. C) The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom. D) The water molecule is neutral. Show Answer Correct Answer: A) The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. 4. Lactose is made up of D-galactose and one unit of D-glucose joined by a ..... glycosidic bond. A) A-1, 4. B) B-1, 4. C) A-1, 2. D) B-1, 2. Show Answer Correct Answer: B) B-1, 4. 5. It is the inactive portion of an enzymes? A) Holoenzymes. B) Apoenzymes. C) Co-Enzymes. D) Metal Ions. Show Answer Correct Answer: B) Apoenzymes. 6. Where does glycolysis take place in cells? A) Cytoplasm. B) Mitochondrion. C) Endoplasmic Reticulum. D) Ribosomes. Show Answer Correct Answer: A) Cytoplasm. 7. Which statement is true about carbohydrates? A) Carbohydrates are a major component of the cell membrane. B) Carbohydrates form enzymes - biological catalysts. C) Carbohydrates are a source of energy. D) Carbohydrates carry the genetic information in plants. Show Answer Correct Answer: C) Carbohydrates are a source of energy. 8. What are the monomers of carbohydrates? A) Monosaccahrides. B) Triglycerides. C) Amino acids. D) Nucleotides. Show Answer Correct Answer: A) Monosaccahrides. 9. Water is attracted to the sides of a glass tube due to which of its properties? A) Cohesion. B) Adhesion. C) Heat Capacity. D) Universal Solvency. Show Answer Correct Answer: B) Adhesion. 10. Which sugars are best providing consistent energy over time? A) Monosaccharides. B) Disaccharides. C) Polysaccharides. D) None of above. Show Answer Correct Answer: C) Polysaccharides. 11. What are the monomer units of a nucleic acid? A) Sugar. B) Fatty Acid. C) Nucleotide. D) Amino Acid. Show Answer Correct Answer: C) Nucleotide. 12. The human body stores sugar (in muscles & liver) in the form of - A) Cellulose. B) Glucose. C) Starch. D) Glycogen. Show Answer Correct Answer: D) Glycogen. 13. 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. 14. Which is an example of a carbohyrdate? A) Wax. B) Bread. C) DNA. D) Red meat. Show Answer Correct Answer: B) Bread. 15. Enzymes are composed of what organic molecule? A) Sugars. B) DNA. C) Proteins. D) Fatty Acids. Show Answer Correct Answer: C) Proteins. 16. 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. 17. 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. 18. Which organic molecule is paired with its function? A) Nucleic acid:to store energy. B) Proteins:to provide insulation. C) Lipids:to regulate metabolic processes. D) Carbohydrate:to provide quick-release energy. Show Answer Correct Answer: D) Carbohydrate:to provide quick-release energy. 19. Which of the following is NOT a B Vitamin? A) B 1. B) B 12. C) B 36. D) Folid Acid. Show Answer Correct Answer: C) B 36. 20. 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. ← 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