This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 9 Biomolecules – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 9 Biomolecules Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Bread, Pasta, Fruit, and Vegetables A) Lipids. B) Nucleic Acids. C) Carbohydrates. D) Proteins. Show Answer Correct Answer: C) Carbohydrates. 2. The loss of a protein's structure is called ..... A) Inactivation. B) Coiling. C) Unfolding. D) Denaturation. Show Answer Correct Answer: D) Denaturation. 3. In a saturated fat, you would expect to find all of the following except- A) Single-bonded carbon atoms. B) CH$_{3}$ at one end. C) Fatty acid(s) attached with glycerol. D) Double bonded carbon atoms fatty acids. Show Answer Correct Answer: D) Double bonded carbon atoms fatty acids. 4. The basic building block of nucleic acids is: A) Amino acid. B) Fatty acid. C) Monosaccharide. D) Nucleotide. Show Answer Correct Answer: D) Nucleotide. 5. Which of the following biomolecules can act as hormones? A) Proteins. B) Carbohydrates. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: A) Proteins. 6. Which biomolecule is in pastas and breads? A) Nucleic Acid. B) Carbohydrate. C) Lipid. D) Protein. Show Answer Correct Answer: B) Carbohydrate. 7. What is the name of protein polymers? A) Polysaccharides. B) Triglycerides. C) Polypeptides. D) DNA and RNA. Show Answer Correct Answer: C) Polypeptides. 8. Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following? A) Monosaccharides. B) RNA chains. C) Lipids. D) Amino acids. Show Answer Correct Answer: A) Monosaccharides. 9. Lipids are insoluble in water because their molecules are ..... ? A) Neutral. B) Zwitter ions. C) Hydrophobic. D) Hydrophilic. Show Answer Correct Answer: C) Hydrophobic. 10. What are polymers made of? A) Lipids. B) Enzymes. C) Macromolecules. D) Monomers. Show Answer Correct Answer: D) Monomers. 11. Which biomolecule is in charge of storing and expressing genetic information? A) Nucleic Acids. B) Carbohydrates. C) Lipids. D) Proteins. Show Answer Correct Answer: A) Nucleic Acids. 12. What is the polymer of a lipid A) Phospholipid. B) Lipids do not have a polymer. C) Fatty Acids. D) Triglyceride. Show Answer Correct Answer: B) Lipids do not have a polymer. 13. A positive Biuret's Test will turn which color? A) Blue. B) Yellow. C) Red. D) Purple. Show Answer Correct Answer: D) Purple. 14. Which biomolecule includes sugars, cellulose and starch? A) Lipids. B) Carbohydrates. C) Proteins. D) Nucleic Acid. Show Answer Correct Answer: B) Carbohydrates. 15. Which of the following is not a carbon compound? A) Nucleic Acids. B) Vitamins. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: B) Vitamins. 16. Eliminating waste is the primary function of the A) Excretory System. B) Respiratory System. C) Digestive System. D) Integumentary system. Show Answer Correct Answer: A) Excretory System. 17. What is the function of carbohydrates? A) Store information for cells. B) Perform cell's functions/tasks. C) Alter other biomolecules. D) Energy storage. E) Fast energy. Show Answer Correct Answer: E) Fast energy. 18. (question 10) What is the monomer for a protein? A) Monosaccharide. B) Nucleotide. C) Amino Acid. D) Triglyceride. Show Answer Correct Answer: C) Amino Acid. 19. Carbon, Hydrogen, Oxygen and Nitrogen are the elements that make up ..... ? A) Nucleic acid. B) Protein. C) Lipid. D) Carbohydrate. Show Answer Correct Answer: B) Protein. 20. Dystrophin is a molecule that holds muscle fibers together. In people with muscular dystrophy, a genetic disease that causes people to lose the ability to walk at a young age, dystrophin molecules never develop.What biomolecule is this person missing? A) Proteins. B) Nucleic Acids. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: A) Proteins. 21. Denaturation of proteins involves: A) Breaking of peptide bonds. B) Loss of secondary and tertiary structure. C) Conversion of $\alpha$-helix to $\beta$-pleated sheet. D) Both (a) and (c). Show Answer Correct Answer: D) Both (a) and (c). 22. What is a fat molecule that stores energy? A) Lipid. B) Protein. C) Carbohydrate. D) None of the above. Show Answer Correct Answer: A) Lipid. 23. Which foods are high in protein? A) Meats, cheeses, milk, eggs. B) Apples, Bananas, Grapes. C) Butter, oil, lard. D) Breads, pasta, grains. Show Answer Correct Answer: A) Meats, cheeses, milk, eggs. 24. What is the name of a carbohydrate polymers? A) Polysaccharides. B) Triglycerides. C) Polypeptides. D) DNA and RNA. Show Answer Correct Answer: A) Polysaccharides. 25. Which of the following determines an enzyme's effectiveness? A) Heat. B) PH (acidic or basic). C) Not enough enzymes; too many substrates. D) All are correct. Show Answer Correct Answer: D) All are correct. 26. Which biomolecule is a key part of the cell membrane and is needed in the formation of hormones? A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: B) Lipids. 27. What type of biomolecule is cholesterol? A) Lipid. B) Carbohydrate. C) Protein. D) Nucleic acid. Show Answer Correct Answer: A) Lipid. 28. If a compound contains 2 monosaccharide units, then it is described as ..... A) Polysaccharide. B) Pentose sugar. C) Derived monosaccharide. D) Disaccharide. Show Answer Correct Answer: D) Disaccharide. 29. CHON with a Variable R group A) Carbohydrate. B) Nucleic acid. C) Lipid. D) Protein. Show Answer Correct Answer: D) Protein. 30. Amino acids and sugars are both required by animals to maintain their health. Without a diet containing both of these, animals cannot survive. Amino acids are obtained by animals when they digest- A) Proteins. B) Carbohydrates. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: A) Proteins. 31. Which biomolecule makes up your genes? A) Carbohydrate. B) Protein. C) Lipid. D) Nucleic Acid. Show Answer Correct Answer: D) Nucleic Acid. 32. (question 9) Which biomolecule includes fats, such as triglycerides, oils, waxes, and steroids (cholesterol); insoluble in water; provides energy storage, insulation, part of cell membrane, and hormones A) Protein. B) Nucleic Acid. C) Carbohydrate. D) Lipids. Show Answer Correct Answer: D) Lipids. 33. (question 13) All polymers are made up of ..... A) Monosaccharides. B) Monomers. C) Proteins. D) None of these. Show Answer Correct Answer: B) Monomers. 34. A diabetic person carries a packet of glucose with him always, because A) Glucose increases the blood sugar level slowly. B) Glucose reduces the blood sugar level. C) Glucose increases the blood sugar level almost instantaneously. D) Glucose reduces the blood sugar level slowly. Show Answer Correct Answer: C) Glucose increases the blood sugar level almost instantaneously. 35. What is the monomer that makes up nucleic acids? A) Fatty acids. B) Monosaccharides. C) Amino acids. D) Nucleotides. Show Answer Correct Answer: D) Nucleotides. 36. What is the primary energy source for most cells A) Sucrose. B) Fructose. C) Lactose. D) Glucose. Show Answer Correct Answer: D) Glucose. 37. Proteins are organic molecules. What atoms do proteins have? A) Carbon, Phosphorus, and Uranium. B) Only Carbon. C) Only Helium. D) Carbon, Hydrogen, Oxygen and Nitrogen. Show Answer Correct Answer: D) Carbon, Hydrogen, Oxygen and Nitrogen. 38. The monomer for a protein is: A) Fatty acid. B) Nucleotide. C) Monosaccharide. D) Amino acid. Show Answer Correct Answer: D) Amino acid. 39. ..... are small individual molecules that when linked together form a ..... A) Polymersmonomer. B) Monomerspolymer. C) Proteinsnucleic acid. D) Carbohydrateslipid. Show Answer Correct Answer: B) Monomerspolymer. 40. What is the primary function of carbohydrates in living organisms? A) Catalyzing reactions. B) Energy storage. C) Genetic information storage. D) Structural support. Show Answer Correct Answer: B) Energy storage. 41. What element needs to be present to consider a molecule organic? A) Oxygen. B) Carbon. C) Phosphorous. D) Nitrogen. Show Answer Correct Answer: B) Carbon. 42. Which macromolecule has the monomer amino acid? A) Protein. B) Carbohydrate. C) Lipid. D) Nucleic Acid. Show Answer Correct Answer: A) Protein. 43. On a nutrition label, which category is lipids? A) Protein. B) Dietary fiber. C) Total fats. D) Total sugars. Show Answer Correct Answer: C) Total fats. 44. Which macromolecule is responsible for Quick energy? A) Lipid. B) Nucleic acid. C) Protein. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. 45. Stores energy in plants as starch A) Nucleic acids. B) Carbohydrates. C) Lipids. D) Proteins. Show Answer Correct Answer: B) Carbohydrates. 46. Which best represents a long term energy storage molecule in animals? A) Cellulose. B) Cholesterol. C) Glycogen. D) None of the above. Show Answer Correct Answer: C) Glycogen. 47. What molecule is released during dehydration synthesis? A) CO2. B) C6H12O6. C) O2. D) H2O. Show Answer Correct Answer: D) H2O. 48. Which of the following biomolecules is primarily responsible for storing and transmitting genetic information? A) Nucleic acids. B) Lipids. C) Carbohydrates. D) Proteins. Show Answer Correct Answer: A) Nucleic acids. 49. Which of the following is a complex polysaccharide? A) Glycerol. B) Glucose. C) Starch. D) Phosphate. Show Answer Correct Answer: C) Starch. 50. Which of the following reactions of glucose can be explained only by its cyclicstructure? A) Pentaacetate of glucose does not react with hydroxylamine. B) Glucose forms gluconic acid. C) Glucose reacts with hydroxylamine. D) Glucose forms pentaacetate. Show Answer Correct Answer: A) Pentaacetate of glucose does not react with hydroxylamine. 51. What is a biomolecule? A) The dissolved particle in a solution. B) One of the by-products of respiration. C) Large organic molecules that are present in living organisms. D) None of the above. Show Answer Correct Answer: C) Large organic molecules that are present in living organisms. 52. A plant wilting is an example of- A) A response to maintain homeostasis. B) Plant death. C) An external stimulus. D) An internal stimulus. Show Answer Correct Answer: D) An internal stimulus. 53. Which of the following biomolecules is primarily responsible for catalyzing biochemical reactions in the body? A) Lipids. B) Nucleic Acids. C) Carbohydrates. D) Proteins. Show Answer Correct Answer: D) Proteins. 54. When looking at the cell membrane, where are the lipid tails located? A) Outer part of the bilayer. B) Goes through each end of the bilayer. C) At the end of the bilayer. D) Inner part of the bilayer. Show Answer Correct Answer: D) Inner part of the bilayer. 55. Many people are lactose intolerant and cannot digest dairy products. What enzyme are their bodies most likely lacking? A) Maltase. B) Lipase. C) Protease. D) Lactase. Show Answer Correct Answer: D) Lactase. 56. This biomolecule stores the genetic information of a living thing. A) Nucleic Acid. B) Carbohydrates. C) Lipids. D) Protein. Show Answer Correct Answer: A) Nucleic Acid. 57. What does organic mean (in science)? A) It costs more at the grocery store. B) It produces energy. C) It is made of many individual parts. D) It contains carbon. Show Answer Correct Answer: D) It contains carbon. 58. Which of the following proteins is fibrous in nature? A) Myoglobin. B) Keratin. C) Insulin. D) Hemoglobin. Show Answer Correct Answer: B) Keratin. 59. Monomer:nucleotide A) Protein. B) Nucleic Acid. C) Lipid. D) Carbohydrate. Show Answer Correct Answer: B) Nucleic Acid. 60. What is the function of an enzyme? A) Enzymes break themselves into small pieces. B) Enzymes slow down chemical reactions. C) Enzymes speed up chemical reactions. D) Enzymes combine products to form reactants. Show Answer Correct Answer: C) Enzymes speed up chemical reactions. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 9 Biomolecules Quiz 2Class 11 Biology Chapter 9 Biomolecules Quiz 3Class 11 Biology Chapter 9 Biomolecules Quiz 4Class 11 Biology Chapter 9 Biomolecules Quiz 5Class 11 Biology Chapter 9 Biomolecules Quiz 6Class 11 Biology Chapter 9 Biomolecules Quiz 7Class 11 Biology Chapter 9 Biomolecules Quiz 8Class 11 Biology Chapter 9 Biomolecules Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books