This quiz works best with JavaScript enabled. Home > Agriculture > Biochemistry > General > Biochemistry – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biochemistry Quiz 25 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which biomolecule contains the most energy per gram? A) Proteins. B) Carbohydrates. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: C) Lipids. 2. Amylase is a biocatalyst that hydrolyzes starch into simple sugarmolecules in the pancreas. Which best describes amylase? A) Fatty acid. B) Lipid. C) Protein. D) Carbohydrate. Show Answer Correct Answer: C) Protein. 3. Which statement applies to hydrolysis A) Produces water. B) Creates proteins from amino acids. C) Breaks down polymers. D) Creates glycogen from glucose. Show Answer Correct Answer: C) Breaks down polymers. 4. Creating a chain of sugar monomers would result in a ..... molecule. A) Starch. B) Lipid. C) Nucleic Acid. D) Protein. Show Answer Correct Answer: A) Starch. 5. Which of these solutions is an acid? A) Drain Cleaner:pH of 14. B) Baking Soda:pH of 9. C) Dish Soap:pH of 12. D) Tomato Soup:pH of 4. Show Answer Correct Answer: D) Tomato Soup:pH of 4. 6. Which best describes how an enzyme affects the rate of a chemicalreaction? A) It causes the reaction to proceed in an unfavorable direction. B) It lowers the activation energy of the reaction. C) It increases the temperature of the reaction. D) It changes the products created in the reaction. Show Answer Correct Answer: B) It lowers the activation energy of the reaction. 7. Involves in Lipid Synthesis and detoxification of drugs and pesticides A) Smooth endoplasmic Reticulum. B) Golgi Appartus. C) Rough endoplasmic Reticulum. D) Ribosomes. Show Answer Correct Answer: A) Smooth endoplasmic Reticulum. 8. The 2nd law of thermodynamics stated that the A) If two thermodynamic systems are in thermal equilibrium with a third system separately are in thermal equilibrium with each other. B) Energy can neither be created nor be destroyed, it can only be transferred from one form to another. C) The measurement of energy in a thermodynamic system. D) The entropy of any isolated system always increases. Show Answer Correct Answer: D) The entropy of any isolated system always increases. 9. When an enzymes active site loses it shape it stops working or stops breaking down other molecules. What is this called? A) Diluted. B) Disinfected. C) Denatured. D) Dinosaur. Show Answer Correct Answer: C) Denatured. 10. What kind of bond is formed when a hydrogen and a hydrogen shares a electron.. A) Covalent Bond. B) Ionic Bond. C) Metallic Bond. D) Treasury Bond. Show Answer Correct Answer: A) Covalent Bond. 11. What element must be present for a molecule to be considered organic? A) Carbon. B) Nitrogen. C) Hydrogen. D) Water. Show Answer Correct Answer: A) Carbon. 12. The building block of a Lipid is a ..... A) Saccharide. B) Amino acid. C) Sugar. D) Fatty acid. Show Answer Correct Answer: D) Fatty acid. 13. Which level of protein structure detremines the function of a protein? A) Secondary. B) Primary. C) Tertiary. D) Quarternary. Show Answer Correct Answer: C) Tertiary. 14. What makes up the disaccharide sucrose? A) Glucose + fructose. B) Glucose + galactose. C) Glucose + maltose. D) Glucose + glucose. Show Answer Correct Answer: A) Glucose + fructose. 15. The main function of proteins in the cell is ..... A) Providing the body with energy. B) Structural components of the cell membrane. C) Catalyzing chemical reactions in the cell. D) Providing the instruction for synthesizing proteins. Show Answer Correct Answer: C) Catalyzing chemical reactions in the cell. 16. What food provides carbohydrates? A) Natural fats. B) Eggs. C) Meat. D) Fruit. Show Answer Correct Answer: D) Fruit. 17. What type of bond shares electrons? A) Hydrogen. B) Ionic. C) Covalent. D) Van der waals. Show Answer Correct Answer: C) Covalent. 18. What elements make up carbohydrates? A) Carbon, hydrogen, nitrogen, oxygen. B) Sulfur, carbon, hydrogen. C) Glucose and fructose. D) Carbon, hydrogen, oxygen. Show Answer Correct Answer: D) Carbon, hydrogen, oxygen. 19. What elements are in a Lipid? A) CHP. B) CHN. C) CH. D) CHO. Show Answer Correct Answer: D) CHO. 20. What is the empirical formula of a polysaccharide that has 5 sugars?(C6H10O5)n A) C30H50O25. B) C6H12O6. C) C6H10O5. D) C12H22O11. Show Answer Correct Answer: A) C30H50O25. 21. The building blocks of proteins are ..... A) DNA. B) Nucleotides. C) Lipids. D) Amino acids. Show Answer Correct Answer: D) Amino acids. 22. Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? A) Hydrolysis only occurs in the urinary system, and dehydration reactionsonly occur in the digestive tract. B) Hydrolysis creates monomers, and dehydration reactions break downpolymers. C) Dehydration reactions can occur only after hydrolysis. D) Dehydration reactions assemble polymers, and hydrolysis breaks downpolymers. Show Answer Correct Answer: D) Dehydration reactions assemble polymers, and hydrolysis breaks downpolymers. 23. What is the purpose of the protein called an enzyme? A) Have no effect on the rate of the chemical reaction. B) Keep the rate of the chemical reaction the same. C) To speed up or catalyze a chemical reaction. D) Slow the rate of a chemical reaction. Show Answer Correct Answer: C) To speed up or catalyze a chemical reaction. 24. In DNA, T is referred to as thymine, however, in RNA, it is represented by what nitrogenous base? A) G (Guanine). B) U (Uracil). C) A (Adenine). D) C (Cytosine). Show Answer Correct Answer: B) U (Uracil). 25. Alpha helix and beta pleated sheets are part of what level of protein structure? A) Quaternary. B) Tertiary. C) Secondary. D) Primary. Show Answer Correct Answer: C) Secondary. 26. Which statement describes the major role of lipids within a cell? A) They cause DNA to replicate. B) They catalyze chemical reactions in the cell cytoplasm. C) They move RNA in the cytoplasm. D) They are the main structural components of membranes. Show Answer Correct Answer: D) They are the main structural components of membranes. 27. What type of substance has an equal concentration of H+ and OH- ions? A) Acid. B) Base. C) Neutral. D) None of above. Show Answer Correct Answer: C) Neutral. 28. Fructose, sucrose, and starch are all examples of ..... A) Lipids. B) Carbohydrates. C) Nucleic Acids. D) Proteins. Show Answer Correct Answer: B) Carbohydrates. 29. The substances that enzymes react on are called A) Catalysts. B) Substrates. C) Reactants. D) Polar molecules. Show Answer Correct Answer: B) Substrates. 30. What happens at physiological pH (7, 4)? A) Most of the carboxyl groups are dissociated and most of the amino groups bind O2. B) Most of the carboxyl groups are dissociated. C) Most of the carboxyl groups are dissociated create anion NH3-. D) Most of the carboxyl groups are dissociated, create anion COO- and most of the amino groups bind H+ creating cation -NH3+. Show Answer Correct Answer: D) Most of the carboxyl groups are dissociated, create anion COO- and most of the amino groups bind H+ creating cation -NH3+. ← 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