Question 1

Which of the following statements correctly describes a hemiacetal in a monosaccharide?

Accepted Answer

A carbon atom bonded to one hydroxyl group, one alkoxy group, one hydrogen atom, and one alkyl group.

Question 2

Which of the following best explains why unsaturated fatty acids have lower melting points than saturated fatty acids?

Accepted Answer

Unsaturated fatty acids have double bonds that create kinks, preventing tight packing.

Question 3

A student tests a sugar with Benedict's reagent and observes a color change. What does this indicate about the sugar?

Accepted Answer

The sugar is a reducing sugar.

Question 4

Which of the following is true about the glycosidic bond in disaccharides?

Accepted Answer

It is formed between the anomeric carbon of one monosaccharide and a hydroxyl group of another.

Question 5

Which process converts a monosaccharide into its corresponding sugar alcohol?

Accepted Answer

Reduction

Question 6

Which of the following is a correct statement about amylose and amylopectin?

Accepted Answer

Amylose is unbranched, while amylopectin is branched.

Question 7

Which of the following lipoproteins is responsible for transporting cholesterol from tissues back to the liver?

Accepted Answer

HDL

Question 8

Which of the following reactions is responsible for the formation of soap from triglycerides?

Accepted Answer

Ester hydrolysis (saponification)

Question 9

Which statement best describes the tertiary structure of a protein?

Accepted Answer

It is the three-dimensional folding of a single polypeptide chain stabilized by interactions between R groups.

Question 10

Which of the following interactions does NOT stabilize the tertiary structure of proteins?

Accepted Answer

Peptide bonds

Question 11

Which of the following amino acids would be classified as polar basic?

Accepted Answer

Lysine

Question 12

Why is vitamin C required for collagen synthesis?

Accepted Answer

It acts as a cofactor for the hydroxylation of proline and lysine residues.

Question 13

Which of the following statements about micelles is correct?

Accepted Answer

Micelles are formed from fatty acid salts and have hydrophobic interiors.

Question 14

Which process is responsible for the movement of small, nonpolar molecules across a cell membrane without energy input?

Accepted Answer

Simple diffusion

Question 15

Which of the following is a product of the hydrolysis of a triglyceride?

Accepted Answer

Three fatty acids and one glycerol

Question 16

Which of the following statements about denaturation of proteins is correct?

Accepted Answer

Denaturation disrupts secondary, tertiary, and quaternary structures without breaking peptide bonds.

Question 17

Which of the following is a correct description of the difference between cellulose and amylose?

Accepted Answer

Cellulose contains β-1,4 glycosidic bonds, while amylose contains α-1,4 glycosidic bonds.

Question 18

Which of the following is a precursor to bile acids discussed in class?

Accepted Answer

Cholesterol

Question 19

Which of the following equations correctly represents the hydrolysis of a triglyceride?

Accepted Answer

$$\mathrm{Triglyceride} + 3\ \mathrm{H_2O} \rightarrow \mathrm{Glycerol} + 3\ \mathrm{Fatty\ acids}$$

GOB Chemistry Study Guide: Carbohydrates, Lipids, and Proteins

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