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 4 of 4
- A. Ester bond
- B. Ether linkage
- C. Hydrogen bond
- D. Ionic bond
Explanation: When glycerol (a type of alcohol) reacts with fatty acids (which contain carboxyl groups), an ester bond is formed through a dehydration…
Correct answer: Ester bond- A. Glycerol
- B. Amine group
- C. Fatty Acid
- D. Phosphate group
Explanation: The phosphate group (-PO₄³⁻) in phospholipids is part of the molecule's hydrophilic head.
Correct answer: Phosphate group- A. Phospholipids
- B. Cellulose
- C. Cholesterol
- D. Vitamin A
Explanation: Cellulose has no double bonds. Cholesterol and Retinol (vitamin A) have double bonds.
Correct answer: Cellulose- A. Some hormones
- B. Enzymes
- C. Skin terdons
- D. insulin
Explanation: Steroid hormones are derived from lipids. They include testosterone, estrogen, and cortisol, among others.
Correct answer: Some hormones- A. Acids
- B. Alcohols
- C. Ethers
- D. Esters
Explanation: Lipids are chemically classified as esters because they are formed through a reaction between fatty acids and an alcohol (typically…
Correct answer: Esters- A. Proteins
- B. Amino acids
- C. Carbohydrates
- D. Esters
Explanation: Lipids are predominantly made up of fatty acids and glycerol. The ester bond formed between these components categorizes lipids as esters.
Correct answer: Esters- A. Always results in the formation of soaps.
- B. Results in the formation of esters.
- C. Results in the formation of waxes.
- D. Results in the formation of glycerol and soap.
Explanation: Saponification is a chemical process where fats or oils react with an alkali, such as sodium hydroxide (NaOH) or potassium hydroxide…
Correct answer: Always results in the formation of soaps.- A. Monohydroxy alcohols
- B. Dihydroxy alcohols
- C. Trihydroxy alcohol
- D. All of the above
Explanation: Waxes are esters formed from the reaction of fatty acids with long-chain monohydroxy alcohols, which have one hydroxyl group.
Correct answer: Monohydroxy alcohols- A. Presence of single bonds between carbon atoms.
- B. Presence of Double bonds between carbon atoms
- C. Presence of Triple bonds between carbon atoms.
- D. Absence of bond between carbon atoms.
Explanation: Saturated fatty acids contain a single bond between the carbon atoms, this is a fact
Correct answer: Presence of single bonds between carbon atoms.- A. Palmitic acid
- B. Archachidic acid
- C. Stearic acid
- D. Oleic acid
Explanation: Option D is correct. Oleic acid is the unsaturated fatty acid. Fatty acids are classified into saturated and unsaturated fatty acids.
Correct answer: Oleic acid- A. Inside the nucleus
- B. Inside the cytoplasm
- C. Inside the plasma membrane
- D. inside the mitochondrial matrix
Explanation: Option C is correct.Phospholipids arrange themselves in a bilayer in the plasma membrane of a cell.
Correct answer: Inside the plasma membrane