This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 23 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the characteristic of a pancreatic juice as it contains a rich supply of bicarbonate? A) Basic. B) Very acidic. C) Acidic. D) Very basic. Show Answer Correct Answer: D) Very basic. 2. Amino acids with basic side chains. A) Lysine. B) Arginine. C) Histidine. D) All the anteriors. Show Answer Correct Answer: D) All the anteriors. 3. Pyruvate carboxylase is located predominantly in A) Extracellular. B) Cytosol. C) Peroxisomes. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 4. This vitamin is important for keeping body tissues, such as gums and muscles in good shape. It is also a key if you get a cut because it helps you heal. This vitamin also helps your body resists infections like cold. A) Vitamin D. B) Vitamin K. C) Vitamin A. D) Vitamin C. Show Answer Correct Answer: D) Vitamin C. 5. Water heating up slowly on the stove is an example of A) Adhesion. B) Surface tension. C) Cohesion. D) High heat capacity. Show Answer Correct Answer: D) High heat capacity. 6. Fructose and sucrose should give positive results for A) Fehling's test. B) Seliwanoff's test. C) Molisch's Test. D) All of these. Show Answer Correct Answer: D) All of these. 7. Water attracts molecules and forms hydration layers. It is also the best solvent in our body. This is because of water's ..... A) High Heat Capacity. B) Reactivity. C) Cushioning. D) Polarity. Show Answer Correct Answer: D) Polarity. 8. Which is not a class of macromolecule? A) Lipid. B) Amino Acid. C) Protein. D) Nucleic Acid. Show Answer Correct Answer: B) Amino Acid. 9. Most carbohydrates in the human body are ..... A) Used as building blocks for proteins. B) Used as a catalysts for reactions in cells. C) Not easily absorbed into the bloodstream. D) Consumed as a source of energy. Show Answer Correct Answer: D) Consumed as a source of energy. 10. Type of matter made of two or more elements ..... A) Element. B) Mixture. C) Compound. D) None of above. Show Answer Correct Answer: C) Compound. 11. Two examples of carbohydrates are A) Fatty acids and glycerol. B) Fats and waxes. C) Sugars and starches. D) Amino acids and alcohol. Show Answer Correct Answer: C) Sugars and starches. 12. When a protein is ..... it can no longer function due to destruction of its secondary, tertiary, and quartenary structure A) Inhibited. B) Denatured. C) Bonded. D) Dead. Show Answer Correct Answer: B) Denatured. 13. Which part of an amino acid determines what type it is (makes it unique)? A) Carboxyl group. B) Amine group. C) R group. D) H group. Show Answer Correct Answer: C) R group. 14. Which end of the water molecule has a slightly positive charge? A) The oxygen end. B) The hydrogen end. C) Both ends are slightly positive. D) Neither end is positive. Show Answer Correct Answer: B) The hydrogen end. 15. What is the difference between DNA and RNA in terms of bases? A) RNA contains uracil in place of thymine. B) RNA contains uracil in place of adenine. C) RNA contains uracil in place of guanine. D) None of above. Show Answer Correct Answer: A) RNA contains uracil in place of thymine. 16. What is the isoelectric point? A) The pH in which the amino acid is a zwitterion ion a. B) The resultant electrostatic charge is equal to 0. C) The pH in which the amino acid is a zwitterion ion and the resultant electrostatic charge is equal to 0. D) The pH in which the amino acid is a zwitterion ion and the resultant electrostatic charge is equal to 5. Show Answer Correct Answer: C) The pH in which the amino acid is a zwitterion ion and the resultant electrostatic charge is equal to 0. 17. Which organelle is responsible for energy production in eukaryotic cells? A) Cytoskeleton. B) Nucleus. C) Golgi apparatus. D) Mitochondrion. Show Answer Correct Answer: D) Mitochondrion. 18. What is the correct order to make a protein? A) Protein, DNA, RNA. B) DNA, RNA, Protein. C) Protein, RNA, DNA. D) None of above. Show Answer Correct Answer: B) DNA, RNA, Protein. 19. What happens when the sodium atom loses an electron? A) It become negatively charged. B) It become positively charged. C) None. D) None of above. Show Answer Correct Answer: B) It become positively charged. 20. Which of the following is not a unique property of water? A) Water molecules stick together by cohesion. B) Frozen water is less dense than liquid water. C) Water molecules stick to other polar substances. D) Hydrogen bonds allow water to heat and cool very quickly. Show Answer Correct Answer: D) Hydrogen bonds allow water to heat and cool very quickly. 21. Which of the following is NOT TRUE about enzymes? A) They speed up the rate of chemical reactions. B) They are used up in chemical reactions. C) They can change shape when temperature or pH changes. D) They are proteins. Show Answer Correct Answer: B) They are used up in chemical reactions. 22. Phospholipids are used in the construction of the ..... A) Cell Membrane. B) Nucleus. C) Ribosomes. D) Proteins. Show Answer Correct Answer: A) Cell Membrane. 23. What is the monomer of nucleic acids? A) Nucleotides. B) Monosaccharides. C) Amino Acids. D) Glycerol. Show Answer Correct Answer: A) Nucleotides. 24. These are called the "quick energy" foods A) Protein. B) Fats/lipids. C) Nucleic acids. D) Carbohydrates/sugars. Show Answer Correct Answer: D) Carbohydrates/sugars. 25. What determines the side chain structure? A) The role of the amino acid in a protein. B) The role of the carboxyl group in a amino acid. C) The role of the amino group in a protein. D) The role of the protein in a amino acid. Show Answer Correct Answer: A) The role of the amino acid in a protein. 26. Made of monosaccharides A) Nucleic Acids. B) Proteins. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 27. The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different A) Asymmetric carbons. B) Side chains (R groups). C) Carboxyl groups attached to an alpha carbon. D) Amino groups attached to an alpha carbon. Show Answer Correct Answer: B) Side chains (R groups). 28. Which organelles that has a continuous membrane throughout the cell? The rough part studded with ribosomes. A) Endoplasmic reticulum. B) Peroxisomes. C) Mitochondria. D) Golgi apparatus. Show Answer Correct Answer: A) Endoplasmic reticulum. 29. Nitrogenous bases are joined by which type of bond? A) Covalent bond. B) Hydrogen bond. C) Polar bond. D) Non polar bond. Show Answer Correct Answer: B) Hydrogen bond. 30. Fructose tests positive in Fehling's test as it is a/an A) Pentose. B) Aldohexose. C) Alpha- hydroxy ketohexose. D) Ketohexose. Show Answer Correct Answer: C) Alpha- hydroxy ketohexose. ← 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