This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 31 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The ..... is the positively charged particle in an atom. A) Proton. B) Neutron. C) Electron. D) None of above. Show Answer Correct Answer: A) Proton. 2. The first step of glycolysis results in the formation of: A) Fructose-6-Phosphate. B) Glucose-6-Phosphate. C) 1, 6 Bis-PhosphoGlycerate. D) ATP. Show Answer Correct Answer: B) Glucose-6-Phosphate. 3. NADH is produced by the oxidation of: A) PEP. B) G3P. C) 1, 3 BPG. D) DHAP. Show Answer Correct Answer: B) G3P. 4. This macro-molecule has a glycerol back-bone attached to hydrocarbon chains. A) Nucleic Acid. B) Lipid. C) Protein. D) Carbohydrate. Show Answer Correct Answer: B) Lipid. 5. A carbohydrate that contain two monosaccharide units bound together by a covalent bond. A) Polysaccharides. B) Disaccharides. C) Saccharides. D) Monosaccharide. Show Answer Correct Answer: B) Disaccharides. 6. Which macro-molecules store and communicates genetic information? A) Lipids. B) Nucleic Acids. C) Proteins. D) Carbohydrates. Show Answer Correct Answer: B) Nucleic Acids. 7. Which are the two building blocks of lipids. A) Polysaccharides and amino acids. B) Glycerol and fatty acids. C) Glucose and fructose. D) Peptide chains. Show Answer Correct Answer: B) Glycerol and fatty acids. 8. Salts are an ..... compound. They have a positive and negative atom that make them up. A) Ionic. B) Covalent. C) Hydrogen. D) Basic. Show Answer Correct Answer: A) Ionic. 9. Which of these statements describes how monomers combine and create macromolecules? A) Amino acids combine to make proteins. B) Glucose molecules combine to make nucleic acids. C) Proteins combine to make glucose. D) Nucleic acids combine to make starch. Show Answer Correct Answer: A) Amino acids combine to make proteins. 10. Dehydration synthesis removes water to join two simple sugars into a disaccharide. This reaction is considered to be ..... A) Inefficient. B) Anabolic. C) Catabolic. D) Entropic. Show Answer Correct Answer: B) Anabolic. 11. How does this relate to evolution. A) It does not. B) The more or less Cytochrome C the more or less the organism has evolved. C) The animal will die. D) None of above. Show Answer Correct Answer: B) The more or less Cytochrome C the more or less the organism has evolved. 12. What happens when enzymes are heated to a high temperature? A) The enzymes die. B) The enzymes remain the same. C) The shapes of the enzyme are altered denature. D) The enzymes' amino acid sequence changes. Show Answer Correct Answer: C) The shapes of the enzyme are altered denature. 13. What is a substrate? A) The molecules that binds to the enzyme at the active site, and causes the enzyme to carry out a task. B) The molecule that does not fit into an enzyme, and has no effect on the enzyme. C) The molecule that binds to a place other than the active site, and caused the enzyme to carry out a task. D) A water molecule that breaks down monomers. Show Answer Correct Answer: A) The molecules that binds to the enzyme at the active site, and causes the enzyme to carry out a task. 14. Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate. What is this called? A) Catalyst. B) Specific. C) Fragile. D) Reusable. Show Answer Correct Answer: D) Reusable. 15. How are the subunits of proteins linked together? A) Peptide bonds. B) Amino acids. C) Ionic bonds. D) Monomers. Show Answer Correct Answer: A) Peptide bonds. 16. What is a substance called if it speeds up a chemical reaction? A) Fragile. B) Specific. C) Catalyst. D) Reusable. Show Answer Correct Answer: C) Catalyst. 17. Sugars (glucose) and starch are examples of this organic molecule: A) Nucleic Acids. B) Proteins. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 18. All organisms contain four organic molecules. Which group of molecules contains fatty acids and glycerol, is insoluble in water, and functions in long term energy storage? A) Proteins. B) Carbohydrates. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: C) Lipids. 19. An unknown molecule contains a sugar and a phosphate group. It is likely what? A) Protein. B) Carbohydrate. C) Nucleic acid. D) Lipid. Show Answer Correct Answer: C) Nucleic acid. 20. What type of reaction is shown below?monomer + monomer $\rightarrow$ polymer + water A) Dehyrolysis. B) Hydrolysis. C) Covalent. D) Dehydration. Show Answer Correct Answer: D) Dehydration. 21. First law of thermodynamics, also known as A) Law of conservation of energy. B) Law of conservation of entropy. C) Law of conservation of studies. D) All of the above. Show Answer Correct Answer: A) Law of conservation of energy. 22. The bond between amino acids within a protein chain is called a ..... ..... A) Peptide bond. B) Sulfur bridge. C) Hydrogen bond. D) Ionic bond. Show Answer Correct Answer: A) Peptide bond. 23. Which of the following foods are a good source of Vitamin B? A) Whole grains, such as wheat and oats. B) Fish and seafood. C) Eggs, dairy products, like milk and yogurt. D) All the above. Show Answer Correct Answer: D) All the above. 24. Carbohydrates are made of ..... A) C H O. B) C H O N P. C) C H O N S. D) C H O N. Show Answer Correct Answer: A) C H O. 25. A researcher wants to determine the effectiveness of an enzyme at various temperatures. Which of the following would best help the researcher determine how well the enzyme is working? A) The researcher should measure the rate of the reaction. B) The researcher should measure the amount of product at the beginning of the reaction. C) The researcher should measure the amount of enzyme remaining after the reaction. D) The researcher should measure the temperature during the reaction. Show Answer Correct Answer: A) The researcher should measure the rate of the reaction. 26. All the 20 amino acids answer the Ninhydrin Test except A) Glycin. B) Valine. C) Proline. D) Tryptophan. Show Answer Correct Answer: C) Proline. 27. Which molecule is an isomer of Glyceraldehyde-3-Phosphate (G3P)? A) 1, 3 BPG. B) DHAP. C) PEP. D) Pyruvic Acid. Show Answer Correct Answer: B) DHAP. 28. Carbohydrates are mostly soluble in ..... A) Protein. B) Water. C) Oil. D) Small quantities only. Show Answer Correct Answer: B) Water. 29. Which of these is NOT true? A) Enzymes speed up chemical reactions. B) Enzymes can only be used once in a chemical reaction. C) Enzymes can denature (change shape) when the temperature gets too high. D) Extreme pH can denature enzymes. Show Answer Correct Answer: B) Enzymes can only be used once in a chemical reaction. 30. What is a polypeptide with more than 100 amino acids? A) Protein. B) Polypeptide. C) Oligopeptide. D) Amino acid. Show Answer Correct Answer: A) Protein. ← 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