Free Lipids MCQs with Answers
71 Lipids MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Lipids include fats, oils, waxes, phospholipids and steroids, which are largely insoluble in water and soluble in organic solvents. Coverage includes glycerol and fatty acids, ester bond formation, saturated and unsaturated fats, triglyceride functions, and phospholipids in cell membranes.
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71 questions · page 3 of 4
- A. Hydrophilic Carbohydrates
- B. Hydrophobic fats
- C. Both a and b
- D. None of these
Explanation: Option A : Carbohydrate groups are present only on the outer surface of the plasma membrane and are attached to proteins, forming…
Correct answer: Both a and b- A. Animals
- B. Plants
- C. Both
- D. None of these
Explanation: Carotenoids perform a protective function in plants. They act as pigments and antioxidants, helping to protect plant cells from damage…
Correct answer: Both43. Cholesterol is:
- A. Animal sterol
- B. C27H46O
- C. 5 methyl groups
- D. All of these
Explanation: Cholestrol is an animal sterol which the structure shown below indicating the presence of 5 methyl groups and the molecular formula C27H46O.
Correct answer: All of these- A. C26
- B. C25
- C. C30
- D. C28
Explanation: Fatty acids in acylglycerols contain carbon atoms in even numbers. C25 is the only one with an odd number of carbons.
Correct answer: C25- A. Lipotropism
- B. Blood cloting factors
- C. Used for energy production
- D. None of these
Explanation: Essential fatty acids are used as blood clotting factors and energy production.
Correct answer: Lipotropism- A. C-C
- B. C-H
- C. C-N
- D. C-O
Explanation: C-H bond has a high bond energy so it breaks to give a lot of energy; thus, lipids due to thor long fatty acid chains have higher energy…
Correct answer: C-H- A. DNA
- B. RNA
- C. ATP
- D. Triglycerides
Explanation: In triglycerides, 3 fatty acid chains form ester bonds with a glycerol molecule which has 3 alcohol groups.
Correct answer: Triglycerides- A. neutral lipid
- B. natural lipid
- C. wax
- D. all of these
Explanation: Neutral lipids are called so because the have no charge as they do not contain acidic or basic groups.
Correct answer: neutral lipid49. Lipids have great functional significance in the human body. What are the main functions of lipids?
- A. Energy source
- B. Structure of membrane
- C. Mechanical protection
- D. All of these options are correct
Explanation: Lipids function as an energy reserve, regulate hormones, membrane lipid layer formation, transmit nerve impulses, cushion vital organs…
Correct answer: All of these options are correct- A. Esterified cholesterol
- B. Glycerophospholipids
- C. Triglycerides
- D. Sphingolipids
Explanation: Correct option is C. Lipids are stored in the body in different forms such as, triglycerides, fat cells, cell membranes and lipoproteins.
Correct answer: Triglycerides- A. Increase in saturated fatty acids in the membrane
- B. Increase in glycolipid content in the membrane
- C. Increase in phospholipid content in the membrane
- D. Increase in unsaturated fatty acids in the membrane
Explanation: The absence or decrease of double bonds, decreases the fluidity, making the membrane strong and rigid.
Correct answer: Increase in saturated fatty acids in the membrane- A. Palmitic acid
- B. Stearic acid
- C. Acetic acid
- D. Linolenic acid
Explanation: Here the most suitable answer will be acetic acid. Other molecules shown resemble fatty acids; they all have long hydrocarbon chains with…
Correct answer: Acetic acid- A. Proteins
- B. Ascorbic Acid
- C. Carbohydrates.
- D. Lipids
Explanation: Explanation:Tay Sach disease is a lipid storage disease. The enzyme absent is involved in catabolism of lipids.
Correct answer: Lipids- A. -COOH
- B. -NH2
- C. Acyl
- D. Sucrose
Explanation: A fatty acid consists of a straight chain of an even number of carbon atoms, with hydrogen atoms along the length of the chain and at one…
Correct answer: -COOH- A. Fatty acids and water
- B. Fatty acids and alcohols
- C. Fatty acids and glucose
- D. Fatty acids and phosphates
Explanation: Acyl-glycerols, such as fats and oils, are esters formed by a condensation reaction between fatty acids and alcohols.
Correct answer: Fatty acids and alcohols- A. Phospholipids
- B. Waxes
- C. Terpenoids
- D. Acylglycerols
Explanation: Cutin in leaves and exoskeleton of insects is made up of wax. Cutin and suberin are complex bio polyesters composed of fatty acids and…
Correct answer: Waxes- A. Triglycerides
- B. Phospholipids
- C. Waxes
- D. Terpenoids
Explanation: Phospholipids are soluble in both water and oil (amphiphilic) because the hydrocarbon tails of two fatty acids are still hydrophobic, but…
Correct answer: Phospholipids- A. Stearic Acid
- B. Palmitic Acid
- C. Butyric Acid
- D. Oleic Acid
Explanation: Oleic acid is a mono-unsaturated omega-9 fatty acid found in various animal and vegetable sources.
Correct answer: Oleic Acid- A. Higher proportion of C-H
- B. Higher proportion of C-O
- C. Higher proportion of Oxygen
- D. Low proportion of C-H bonds
Explanation: C-H bond is a stronger bond than the C-O bond, and since lipids contain a much higher proportion of C-H bonds than carbohydrates (because…
Correct answer: Higher proportion of C-H- A. 6
- B. 2
- C. 4
- D. 8
Explanation: Fatty acids are organic molecules consisting of a hydrocarbon chain with a carboxylic acid group (-COOH) at one end.
Correct answer: 4