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Practice Questions

Saturated fatty acids characteristically contain

A. One or more double bonds
B. No carbon-carbon double bonds ✓
C. Triple bonds
D. Phosphate groups
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Jun 27, 2026

The phosphate-containing lipid among the following is

A. Wax
B. Phospholipid ✓
C. Triglyceride
D. Neutral fat
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Jun 27, 2026

One molecule of glycerol can combine with a maximum of

A. One fatty acid
B. Two fatty acids
C. Three fatty acids ✓
D. Four fatty acids
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Jun 27, 2026

Biological membranes remain flexible because phospholipids possess

A. Polar heads and nonpolar tails ✓
B. Three phosphate groups
C. Peptide chains
D. Cellulose fibers
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Jun 27, 2026

Triglycerides primarily function as

A. Enzymes
B. Energy reserves ✓
C. Genetic material
D. Hormones
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Jun 27, 2026

The ester linkage in lipids is formed between

A. Amino and carboxyl groups
B. Hydroxyl and carboxyl groups ✓
C. Phosphate and amino groups
D. Sulfur and oxygen
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Jun 27, 2026

Acylglycerols are produced through the reaction between

A. Amino acids and fatty acids
B. Glycerol and fatty acids ✓
C. Glucose and fatty acids
D. Ribose and proteins
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Jun 27, 2026

The hydrophilic portion of a phospholipid faces

A. Interior of membrane
B. Aqueous environment ✓
C. Fatty acid tails
D. Protein core only
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Jun 27, 2026

A diglyceride differs from a triglyceride because it contains

A. One fatty acid
B. Two fatty acids ✓
C. Three phosphate groups
D. No glycerol
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Jun 27, 2026

Energy stored in triglycerides exceeds carbohydrates because triglycerides contain

A. Less hydrogen
B. More hydrogen and less oxygen ✓
C. More nitrogen
D. More sulfur
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Jun 27, 2026

The hydrophobic region of a phospholipid consists of

A. Phosphate group
B. Fatty acid tails ✓
C. Glycerol only
D. Protein chains
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Jun 27, 2026

Esterification of glycerol with fatty acids results in the formation of

A. Amino acids
B. Acylglycerols ✓
C. Polysaccharides
D. Nucleotides
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Jun 27, 2026

Lipids generally exhibit high solubility in

A. Water
B. Organic solvents ✓
C. Blood plasma
D. Dilute acids
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Jun 27, 2026

Phospholipids contribute mainly to

A. Long-term energy storage
B. Membrane structure ✓
C. Hormone synthesis only
D. DNA replication
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Jun 27, 2026

Glycerol is chemically classified as

A. Monohydric alcohol
B. Dihydric alcohol
C. Trihydric alcohol ✓
D. Phenol
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Jun 27, 2026

Formation of triglycerides involves the removal of

A. Carbon dioxide
B. Water molecules ✓
C. Oxygen gas
D. Nitrogen gas
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Jun 27, 2026

Complete hydrolysis of one triglyceride molecule produces

A. One glycerol and three fatty acids ✓
B. Two glycerol molecules
C. Three alcohol molecules
D. Four fatty acids
nmdcat.online BIO NMDCAT
Jun 27, 2026

Cell membranes primarily consist of

A. Triglycerides
B. Phospholipid bilayer ✓
C. Cholesterol only
D. Cellulose
nmdcat.online BIO NMDCAT
Jun 27, 2026

The amphipathic nature of phospholipids results from the presence of

A. Hydrophobic proteins only
B. Hydrophilic phosphate head and hydrophobic fatty acid tails ✓
C. Three fatty acid chains
D. Polar glycerol only
nmdcat.online BIO NMDCAT
Jun 27, 2026
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