Question 1

Which of the following best describes the difference between a monosaccharide and a polysaccharide?

Accepted Answer

A monosaccharide contains only one sugar unit, while a polysaccharide contains many sugar units linked by glycosidic bonds.

Question 2

Which of the following statements about D- and L-glucose is correct?

Accepted Answer

D- and L-glucose are enantiomers, meaning they are non-superimposable mirror images of each other.

Question 3

Which functional group is present at the anomeric carbon of glucose in its linear form?

Accepted Answer

Aldehyde

Question 4

Which of the following best describes the difference between α and β anomers of glucose?

Accepted Answer

They differ in the configuration of the hydroxyl group at the anomeric carbon after cyclization.

Question 5

Which of the following is a correct statement about the oxidation of an aldose sugar?

Accepted Answer

The aldehyde group is converted to a carboxylic acid.

Question 6

Which of the following disaccharides contains a β(1→4) glycosidic bond?

Accepted Answer

Lactose

Question 7

A patient with blood type A can safely receive blood from which of the following donors?

Accepted Answer

Type O

Question 8

Which of the following statements about soluble and insoluble fibers is correct?

Accepted Answer

Soluble fibers dissolve in water and can help lower blood cholesterol.

Question 9

Which of the following best describes an epimer?

Accepted Answer

Two stereoisomers that differ in configuration at only one chiral center.

Question 10

Which of the following is the correct application of Boyle’s Law?

Accepted Answer

If the pressure on a gas is doubled at constant temperature, its volume is halved: $$P_1V_1 = P_2V_2$$

Question 11

A sample of gas occupies 2.0 L at 1.0 atm and 300 K. What will be its volume at 2.0 atm and 300 K?

Accepted Answer

1.0 L

Question 12

Which of the following compounds can form hydrogen bonds with water?

Accepted Answer

CH$$_3OH ($$methanol)

Question 13

Which of the following statements about the boiling points of liquids is correct?

Accepted Answer

Liquids with stronger intermolecular forces have higher boiling points.

Question 14

Which of the following best explains why oil does not dissolve in water?

Accepted Answer

Oil is nonpolar and water is polar; according to the golden rule of solubility, 'like dissolves like.'

Question 15

Which of the following best describes an amphipathic molecule?

Accepted Answer

A molecule that contains both hydrophilic (polar) and hydrophobic (nonpolar) regions.

Question 16

Which of the following statements about the structure of a cell membrane is correct?

Accepted Answer

It is composed of a phospholipid bilayer with hydrophilic heads facing outward and hydrophobic tails facing inward.

Question 17

Which of the following best describes the function of an emulsifier in food?

Accepted Answer

It allows polar and nonpolar substances to mix by stabilizing the interface between them.

Question 18

Which of the following statements about fats and oils is correct?

Accepted Answer

Fats are generally solid at room temperature due to stronger intermolecular forces, while oils are liquid due to weaker forces.

Question 19

A gas sample has a pressure of 1.5 atm, a volume of 3.0 L, and a temperature of 300 K. What will the pressure be if the volume is decreased to 2.0 L and the temperature is increased to 400 K? (Use the combined gas law: $$\frac{P_1V_1}{T_1$} = \frac{P_2V_2}{T_2$})$$

Accepted Answer

3.0 atm

Question 20

Which of the following best describes a micelle formed by fatty acids in water?

Accepted Answer

A spherical structure with hydrophobic tails inward and hydrophilic heads outward.

Carbohydrates and States of Matter: Study Guide for CHEM 102 (Chapters 6-7)

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