MCQs

11212 questions found

Practice Questions

Hydrolysis of triglycerides within the digestive tract is catalyzed primarily by

A. Lipase ✓

B. Amylase

C. Pepsin

D. Maltase

Lipase specifically hydrolyzes ester bonds present in triglycerides.

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Jun 27, 2026

The phosphate group in phospholipids contributes mainly to

A. Energy storage

B. Hydrophilic property ✓

C. Ester bond formation

D. Fatty acid synthesis

The phosphate-containing head is polar and interacts with water.

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nmdcat.online BIO NMDCAT

Jun 27, 2026

Increased unsaturation in fatty acids generally causes lipids to become

A. More solid at room temperature

B. More fluid at room temperature ✓

C. Completely insoluble

D. Chemically inactive

Double bonds introduce bends that reduce tight packing of fatty acid chains.

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nmdcat.online BIO NMDCAT

Jun 27, 2026

A triglyceride molecule containing three different fatty acids is classified as

A. Simple triglyceride

B. Mixed triglyceride ✓

C. Phospholipid

D. Wax

Mixed triglycerides contain two or three different fatty acids attached to glycerol.

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nmdcat.online BIO NMDCAT

Jun 27, 2026

Formation of an ester bond during lipid synthesis occurs between

A. Two fatty acids

B. A hydroxyl group of glycerol and a carboxyl group of a fatty acid ✓

C. Two amino acids

D. A phosphate and a sugar

Esterification joins glycerol and fatty acids by removing one molecule of water.

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nmdcat.online BIO NMDCAT

Jun 27, 2026

Cellular membranes exhibit selective permeability mainly because of the presence of

A. Triglycerides

B. Phospholipid bilayer ✓

C. Glycogen

D. Cellulose

Phospholipids arrange into a bilayer with hydrophilic heads outward and hydrophobic tails inward, forming a selectively permeable membrane.

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nmdcat.online BIO NMDCAT

Jun 27, 2026

Unsaturated fatty acids differ from saturated fatty acids by possessing

A. Additional glycerol

B. One or more double bonds ✓

C. Peptide bonds

D. Phosphate heads only

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nmdcat.online BIO NMDCAT

Jun 27, 2026

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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nmdcat.online BIO NMDCAT

Jun 27, 2026

The phosphate-containing lipid among the following is

A. Wax

B. Phospholipid ✓

C. Triglyceride

D. Neutral fat

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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

Jun 27, 2026

Triglycerides primarily function as

A. Enzymes

B. Energy reserves ✓

C. Genetic material

D. Hormones

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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

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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nmdcat.online BIO NMDCAT

Jun 27, 2026

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MCQs

Practice Questions

Hydrolysis of triglycerides within the digestive tract is catalyzed primarily by

The phosphate group in phospholipids contributes mainly to

Increased unsaturation in fatty acids generally causes lipids to become

A triglyceride molecule containing three different fatty acids is classified as

Formation of an ester bond during lipid synthesis occurs between

Cellular membranes exhibit selective permeability mainly because of the presence of

Unsaturated fatty acids differ from saturated fatty acids by possessing

Saturated fatty acids characteristically contain

The phosphate-containing lipid among the following is

One molecule of glycerol can combine with a maximum of

Biological membranes remain flexible because phospholipids possess

Triglycerides primarily function as

The ester linkage in lipids is formed between

Acylglycerols are produced through the reaction between

The hydrophilic portion of a phospholipid faces

A diglyceride differs from a triglyceride because it contains

Energy stored in triglycerides exceeds carbohydrates because triglycerides contain

The hydrophobic region of a phospholipid consists of

Esterification of glycerol with fatty acids results in the formation of

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