$$\text{Triglyceride} + 3\ \text{NaOH} \rightarrow 3\ \text{Soap} + \text{Glycerol}$$

Question 1

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

Accepted Answer

A carbon atom bonded to an -OH group, an -OR group, a hydrogen atom, and an alkyl group.

Question 2

Which of the following sugars will give a positive result with Benedict's reagent?

Accepted Answer

Glucose

Question 3

What is the product formed when a monosaccharide undergoes reduction?

Accepted Answer

A sugar alcohol

Question 4

Which type of glycosidic bond links the glucose units in amylose?

Accepted Answer

$$\alpha-1$$,4-glycosidic bond

Question 5

Which statement correctly compares amylose and cellulose?

Accepted Answer

Amylose contains $$\alpha-1$$,4-glycosidic bonds, while cellulose contains $$\beta-1$$,4-glycosidic bonds.

Question 6

Which of the following fatty acids would have the lowest melting point?

Accepted Answer

Linoleic acid ($$C_{18}:2)$$

Question 7

What is the general structure of a triglyceride?

Accepted Answer

Three fatty acids esterified to a glycerol backbone

Question 8

Which process converts unsaturated fats to saturated fats?

Accepted Answer

Hydrogenation

Question 9

Which of the following is NOT a function of cholesterol in the body?

Accepted Answer

Source of energy for muscle contraction

Question 10

Which lipoprotein is responsible for transporting cholesterol from tissues back to the liver?

Accepted Answer

HDL

Question 11

Which of the following statements about micelles is correct?

Accepted Answer

Micelles are formed from fatty acid salts in water, with hydrophilic heads facing outward.

Question 12

Which of the following amino acids is most likely to be found in the interior of a protein due to its nonpolar side chain?

Accepted Answer

Leucine

Question 13

Which type of interaction is NOT involved in stabilizing the tertiary structure of proteins?

Accepted Answer

Peptide bonds

Question 14

Why is vitamin C required for collagen synthesis?

Accepted Answer

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

Question 15

Which process best describes the breakdown of a triglyceride into fatty acids and glycerol?

Accepted Answer

Hydrolysis

Question 16

Which statement best describes the difference between hydrolysis and denaturation of proteins?

Accepted Answer

Hydrolysis breaks peptide bonds, while denaturation disrupts secondary and tertiary structure without breaking peptide bonds.

Question 17

Which model of enzyme-substrate binding suggests that the enzyme changes shape to fit the substrate?

Accepted Answer

Induced-fit model

Question 18

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

Accepted Answer

Unsaturated fatty acids have kinks in their chains due to double bonds, preventing tight packing.

Question 19

Which equation correctly represents the saponification of a triglyceride?

Accepted Answer

$$	ext{Triglyceride} + 3\ 	ext{NaOH} ightarrow 3\ 	ext{Soap} + 	ext{Glycerol}$$

Question 20

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

Accepted Answer

Simple diffusion

Carbohydrates, Lipids, and Proteins: Structure, Function, and Biochemical Processes

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