Question 1

Which of the following best describes the general empirical formula for most monosaccharides?

Accepted Answer

$$C_n(H_2O)_n$$

Question 2

Which of the following statements correctly distinguishes between an aldose and a ketose?

Accepted Answer

Aldoses contain an aldehyde group, while ketoses contain a ketone group.

Question 3

Which of the following is a non-reducing disaccharide?

Accepted Answer

Sucrose

Question 4

What type of glycosidic linkage is found in maltose?

Accepted Answer

$$\alpha-1$$,4 linkage

Question 5

Which of the following best explains why glucose, galactose, and fructose have different chemical properties despite having the same molecular formula ($$C_6H_{12}O_6$)?

Accepted Answer

They differ in the arrangement of functional groups around their chiral carbons.

Question 6

Which of the following is a function of ribose in living organisms?

Accepted Answer

It is a structural element of nucleic acids.

Question 7

A patient is diagnosed with a deficiency in the enzyme that breaks down lactose. Which of the following symptoms is most likely to occur?

Accepted Answer

Gastrointestinal discomfort after consuming dairy products

Question 8

Which of the following best describes the difference between a hemiacetal and an acetal carbon in sugars?

Accepted Answer

A hemiacetal carbon is bonded to one ether and one alcohol group, while an acetal carbon is bonded to two ether groups.

Question 9

Which of the following polysaccharides is primarily used for energy storage in animals?

Accepted Answer

Glycogen

Question 10

Which of the following best describes the structural difference between $$\alpha-$$glucose and $$\beta-$$glucose in their cyclic forms?

Accepted Answer

The orientation of the hydroxyl group at the anomeric carbon (C-1)

Question 11

Which of the following is a correct pairing of a disaccharide and its monomer units?

Accepted Answer

Lactose: Galactose and Glucose

Question 12

Which of the following statements about cellulose is correct?

Accepted Answer

It is a polysaccharide composed of $$\beta-$$glucose units linked by $$\beta-1$$,4 glycosidic bonds.

Question 13

Which of the following best explains why sucrose is classified as a non-reducing sugar?

Accepted Answer

Both anomeric carbons are involved in the glycosidic bond, preventing a free hemiacetal group.

Question 14

Which of the following is a correct description of the D and L designations in sugars?

Accepted Answer

They refer to the orientation of the hydroxyl group on the highest-numbered chiral carbon in the Fischer projection.

Question 15

A food scientist is developing a new jam and wants to ensure proper gel formation. Which polysaccharide should be added to achieve this?

Accepted Answer

Pectin

Question 16

Which of the following best describes the role of carbohydrates in living organisms?

Accepted Answer

They serve as the main source of quick energy and provide structural support.

Question 17

Which of the following is a correct example of a monosaccharide and its function?

Accepted Answer

Mannose: Constituent of mucoproteins and glycoproteins

Question 18

Which of the following best explains why formaldehyde ($$HCHO) is $$not classified as a carbohydrate, even though it fits the general formula $$C_n(H_2O)_n$$?

Accepted Answer

It does not contain multiple hydroxyl groups.

Question 19

Which of the following best describes the difference between starch and glycogen?

Accepted Answer

Starch is the main storage polysaccharide in plants, while glycogen is the main storage polysaccharide in animals.

Carbohydrates: Structure, Classification, and Biological Importance

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