This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 9 Biomolecules – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 9 Biomolecules Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The differences between two molecules include the type of sugar that forms a section of the molecules and the identify of one of the four nitrogenous bases that make up another section of the molecules. These two molecules are- A) Complex carbohydrates. B) Nucleic acids. C) Lipids. D) Proteins. Show Answer Correct Answer: B) Nucleic acids. 2. What is the primary role of nucleic acids in living organisms? A) Energy storage. B) Genetic information storage and transfer. C) Structural support. D) Insulation. Show Answer Correct Answer: B) Genetic information storage and transfer. 3. Which of the following is an example of ketohexose? A) Galactose. B) Maltose. C) Fructose. D) Mannose. Show Answer Correct Answer: C) Fructose. 4. Which biomolecule is used for short term energy storage? A) Carbohydrates. B) Nucleic acids. C) Proteins. D) Lipids. Show Answer Correct Answer: A) Carbohydrates. 5. In DNA, adenine pairs with: A) Thymine. B) Cytosine. C) Uracil. D) Guanine. Show Answer Correct Answer: A) Thymine. 6. ..... can contain long fatty acid chains. A) Carbohydrates. B) Lipids. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: B) Lipids. 7. In a sample of DNA, 20 percent is Adenine. What are the percentages of the other bases? A) Thymine-30 percent, Cytosine 30 percent, Guanine 20 percent. B) Cytosine-20 percent, Thymine-30 percent, Guanine 25 percent. C) Thymine-20 percent, Cytosine 30 percent, Guanine 30 percent. D) Thymine-30 percent, Cytosine 25 percent, Guanine 25 percent. Show Answer Correct Answer: C) Thymine-20 percent, Cytosine 30 percent, Guanine 30 percent. 8. How many C-atoms are there is a pyranose ring? A) 5. B) 3. C) 7. D) 6. Show Answer Correct Answer: D) 6. 9. ..... is a non reducing sugar A) Fructose. B) Lactose. C) Sucrose. D) Glucose. Show Answer Correct Answer: C) Sucrose. 10. The nitrogen bases in DNA are held together by ..... A) Codons. B) A triplet. C) Hydrogen bonds. D) Methylhydro bonds. Show Answer Correct Answer: C) Hydrogen bonds. 11. What is the function of a lipid? A) To make up our traits. B) To provide short-term energy. C) To provide long-term energy. D) To store genetic info. Show Answer Correct Answer: C) To provide long-term energy. 12. What is the name of the chemical reaction that links monomers to form a polymer? A) SN2. B) Hydrolysis. C) Peptide bond formation. D) Dehydration synthesis. Show Answer Correct Answer: D) Dehydration synthesis. 13. Which biomolecule is used for repair, reproduction and protein synthesis? A) Lipids. B) Carbohydrate. C) Proteins. D) Nucleic acids. Show Answer Correct Answer: D) Nucleic acids. 14. Carbohydrates have C, H, O. What is the ratio of elements? A) 3:1:3. B) 1:2:1. C) 1:3:1. D) 2:1:2. Show Answer Correct Answer: B) 1:2:1. 15. Deficiency of Vitamin B12 causes: A) Beri-beri. B) Pernicious anemia. C) Rickets. D) Scurvy. Show Answer Correct Answer: B) Pernicious anemia. 16. What is the body's second most preferred food source? A) Nucleic acid. B) Carbohydrate. C) Lipid. D) Protein. Show Answer Correct Answer: C) Lipid. 17. What is the job function of starchs A) To provide energy and regulate blood glucose. B) To build and repair tissues. C) To carry oxygen in the blood. D) To help in digestion. Show Answer Correct Answer: A) To provide energy and regulate blood glucose. 18. What does hydro-or hydra-mean? A) Fire. B) Water. C) Air. D) Rock. Show Answer Correct Answer: B) Water. 19. What are foods that are high in carbs? A) Eggs, fish, poultry. B) Cheese, meats, vegetables. C) Bread, potatoes, and pasta. D) Multitude of oils, butter and condiments. Show Answer Correct Answer: C) Bread, potatoes, and pasta. 20. Assertion:During denaturation of protein primary structure gets destroyed.Reason:Curdling of milk is an example of denaturation of protein. A) Both A & R are correct and R is the correct explanation. B) Both A & R are correct but R is not the correct explanation. C) A is the correct statement but R is wrong. D) Both A & R are wrong. OR A is wrong & R is correct. Show Answer Correct Answer: D) Both A & R are wrong. OR A is wrong & R is correct. 21. What is the monomer (building block) of a protein? A) Fatty acid. B) Amino acids. C) Nucleotide. D) Monosaccharide. Show Answer Correct Answer: B) Amino acids. 22. Do we eat nucleic acids? A) Yes. B) No. C) Only sometimes on accident. D) None of the above. Show Answer Correct Answer: A) Yes. 23. Which elements are commonly found in biomolecules? A) Aluminum, Silicon, Titanium, Nickel. B) Sodium, Potassium, Chlorine, Calcium. C) Iron, Copper, Zinc, Magnesium. D) Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous. Show Answer Correct Answer: D) Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous. 24. Nucleotide is obtained from nucleoside just by adding A) Salt. B) Sugar. C) Water. D) Phosphate group. Show Answer Correct Answer: D) Phosphate group. 25. Assertion:Amino acids are more soluble than corresponding haloacids.Reason:Amino acids exist as zwitter ion. A) Both A & R are correct and R is the correct explanation. B) Both A & R are correct but R is not the correct explanation. C) A is the correct statement but R is wrong. D) Both A & R are wrong. OR A is wrong & R is correct. Show Answer Correct Answer: A) Both A & R are correct and R is the correct explanation. 26. Which biomolecule is used to build and repair body structures and to regulate body processes? A) Lipid. B) Carbohydrate. C) Protein. D) None of the above. Show Answer Correct Answer: C) Protein. 27. What will most likely happen if an appropriate enzyme is added to a chemical reaction? A) The equilibrium of the reaction will be maintained. B) The reaction rate will decrease. C) The reaction will stop. D) The reaction rate will increase. Show Answer Correct Answer: D) The reaction rate will increase. 28. The monomer for ..... is monosaccharides. A) Carbohydrates. B) Proteins. C) Nucleic Acid. D) Lipids. Show Answer Correct Answer: A) Carbohydrates. 29. The process of active transport uses ATP and this biomolecule to move materials from low to high concentrations. A) Carbohydrates. B) Nucleic acids. C) Proteins. D) Lipids. Show Answer Correct Answer: C) Proteins. 30. What do we call the building blocks of biomolecules? A) Elements. B) Function. C) Crumbling. D) Monomer. Show Answer Correct Answer: D) Monomer. 31. "Ramachandran plot" is used to confirm the structure of A) DNA. B) RNA. C) Proteins. D) Triacylglycerides. Show Answer Correct Answer: C) Proteins. 32. Which Biomolecule can be water proofing? A) Proteins. B) Nucleic Acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: D) Lipids. 33. Meat and eggs are considered which biomolecules A) Protein. B) Nucleic acid. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: A) Protein. 34. Nucleic acids / Carbohydrates provide proteins with specific instructions for cell growth and repair. A) Nucleic acids. B) Carbohydrates. C) All the above. D) None of the above. Show Answer Correct Answer: A) Nucleic acids. 35. Which biomolecule is one of the main sources of energy in the human body? A) Nucleic acids. B) Proteins. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: C) Carbohydrates. 36. What two biomolecules make up the cell membrane? A) Glucose and Fructose. B) Carbs and Protein. C) Protein and Lipids. D) Nucleic Acids and Lipids. Show Answer Correct Answer: C) Protein and Lipids. 37. Which is used to make cell walls (cellulose)? A) Nucleic Acid. B) Lipid. C) Carbohydrate. D) Protein. Show Answer Correct Answer: C) Carbohydrate. 38. How do lipids contribute to energy storage in the body? A) Lipids are stored in the muscles for energy storage. B) Lipids are converted into and stored as adipose tissue, which can be broken down and converted back into energy when needed. C) Lipids are broken down into glucose for energy storage. D) Lipids are converted into proteins for energy storage. Show Answer Correct Answer: B) Lipids are converted into and stored as adipose tissue, which can be broken down and converted back into energy when needed. 39. In an experiment, a scientist wants to test the effect of temperature on enzyme activity. Which biomolecule is the scientist most likely studying? A) Nucleic Acids. B) Proteins. C) Lipids. D) Carbohydrates. Show Answer Correct Answer: B) Proteins. 40. People with albinism do not produce the melanin protein. Melanin allows for people to be protected from the sun and thus people with albinism are prone to severe sunburns. Which biomolecule would you infer is responsible for albinism? A) Protein. B) Lipid. C) Carbohydrate. D) Nucleic Acid. Show Answer Correct Answer: D) Nucleic Acid. 41. Lipids have which of the following monomer: A) Monosaccharide. B) Nucleotide. C) Amino acids. D) Glycerol & fatty acids. Show Answer Correct Answer: D) Glycerol & fatty acids. 42. If I wanted to see if my new Low Carb Bread had a lot of starch in it I would use which of the following test to decide? A) Iodine Test. B) Benedict's Test. C) Biuret Test. D) Sudan IV Test. Show Answer Correct Answer: A) Iodine Test. 43. Monomers combine to form ..... through the process of ..... A) Polymers; dehydration synthesis. B) Monomers; hydrolysis. C) Polymers; hydrolysis. D) Monomers; dehydration synthesis. Show Answer Correct Answer: A) Polymers; dehydration synthesis. 44. Which are examples of proteins? A) Fats, oils, waxes. B) Meats, enzyme, lactase, eggs. C) DNA, RNA. D) Glucose, pasta, bread. Show Answer Correct Answer: B) Meats, enzyme, lactase, eggs. 45. Which biomolecule does the body use as it's first choice for an energy source? A) Nucleic Acids. B) Carbohydrates. C) Lipids. D) Proteins. Show Answer Correct Answer: B) Carbohydrates. 46. An enzyme works optimally at a pH between 1 and 3. Which best explains what will happen to this enzyme at a pH of 10? A) It will work on the same substrate as it did at a pH range of 2-4, but it will not work as well. B) It will work on a different substrate than at a pH range of 1-3. C) It will lose its original shape and work on new substrates. D) It will lose its original shape and not work on any substrate at all. Show Answer Correct Answer: D) It will lose its original shape and not work on any substrate at all. 47. Which is not true about lipids? A) They are hydrophilic. B) They are hydrophobic. C) They can be dissolved away by nonpolar solvents. D) Glycerol and fatty acids are its building blocks. Show Answer Correct Answer: A) They are hydrophilic. 48. Lipids are made of A) Monosaccharides. B) Amino acids. C) Glycerol and 3 fatty acids. D) Nucleotides. Show Answer Correct Answer: C) Glycerol and 3 fatty acids. 49. What is the difference between a plant cell and an animal cell? A) Plant cell has a cell membrane and chloroplasts. B) Planet cell has a cell wall and chloroplasts. C) Animal cell has a cell membrane and a cell wall. D) Animal cell has a cell wall and chloroplasts. Show Answer Correct Answer: B) Planet cell has a cell wall and chloroplasts. 50. Enzymes function by A) Increasing activation energy. B) Having a specific shape that allows it to bond with specific reactants (like a lock and key). C) Greatly decreasing reaction rates. D) Acting as a catalyst for many different reactions. Show Answer Correct Answer: B) Having a specific shape that allows it to bond with specific reactants (like a lock and key). 51. Which of the following is a term that refers to an energy source obtained from plants? A) Cellulose. B) Glycogen. C) Lipids. D) Starch. Show Answer Correct Answer: D) Starch. 52. Fats are specialized lipid molecules, and enzymes are specialized protein molecules. How do the functions of fats and enzymes differ? A) Fats provide support for cells, while enzymes lower the pH of gastric fluids. B) Fats are structural building materials, while enzymes are transportation molecules. C) Fats are storage molecules, while enzymes are catalytic molecules. D) Fats regulate body functions, while enzymes denature invasive bacteria. Show Answer Correct Answer: C) Fats are storage molecules, while enzymes are catalytic molecules. 53. What does poly-mean? A) One. B) None. C) Many. D) Sugar. Show Answer Correct Answer: C) Many. 54. Which type of biomolecule is most likely to be used as a quick source of energy during physical activity? A) Lipids. B) Proteins. C) Nucleic Acids. D) Carbohydrates. Show Answer Correct Answer: D) Carbohydrates. 55. Monomer:monosaccharide (sugar) A) Carbohydrate. B) Lipid. C) Protein. D) Nucleic Acid. Show Answer Correct Answer: A) Carbohydrate. 56. What is a substance called if it speeds up a chemical reaction? A) Fragile. B) Catalyst. C) Specific. D) Reusable. Show Answer Correct Answer: B) Catalyst. 57. Storing and transmitting genetic material is the function of which biomolecule? A) Protiens. B) Carbohydrates. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: D) Nucleic acids. 58. The four most common elements found in biomolecules are ..... A) Sulfur, Phosphorus, Carbon, Oxygen. B) Sulfur, Nitrogen, Carbon, Iron. C) Carbon, Nitrogen, Hydrogen, Sulfur. D) Carbon, Oxygen, Nitrogen, Hydrogen. Show Answer Correct Answer: D) Carbon, Oxygen, Nitrogen, Hydrogen. 59. Triglycerides are: A) A class of proteins. B) A class of lipids. C) A specific type of carbohydrate. D) None of the above. Show Answer Correct Answer: B) A class of lipids. 60. Oils are which type of biomolecule? A) Carbohydrates. B) Proteins. C) Lipids. D) Nucleic acids. Show Answer Correct Answer: C) Lipids. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 9 Biomolecules Quiz 1Class 11 Biology Chapter 9 Biomolecules Quiz 2Class 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