Question 1

Which of the following best describes the general formula for carbohydrates?

Accepted Answer

$C_nH_{2n}O_n$

Question 2

Which statement correctly distinguishes between monosaccharides, disaccharides, and polysaccharides?

Accepted Answer

Monosaccharides are single sugar units, disaccharides are two monosaccharides joined by a glycosidic bond, and polysaccharides are long chains of monosaccharides.

Question 3

Which of the following is a structural polysaccharide found in plant cell walls?

Accepted Answer

Cellulose

Question 4

A disaccharide is formed by which type of chemical reaction?

Accepted Answer

Dehydration synthesis

Question 5

Which of the following is TRUE about glycogen?

Accepted Answer

It is an extensively branched polysaccharide used for energy storage in animals.

Question 6

Which of the following lipids is characterized by a backbone of four fused carbon rings?

Accepted Answer

Steroid

Question 7

Phospholipids are essential components of biological membranes because:

Accepted Answer

They have hydrophilic heads and hydrophobic tails, allowing them to form bilayers.

Question 8

Which of the following is a correct description of an unsaturated fatty acid?

Accepted Answer

It contains one or more double bonds between carbon atoms, resulting in fewer hydrogen atoms.

Question 9

Which of the following is the correct chemical equation for the formation of a generic disaccharide from two monosaccharides?

Accepted Answer

$C_6H_{12}O_6 + C_6H_{12}O_6 \rightarrow C_{12}H_{22}O_{11} + H_2O$

Question 10

Which of the following statements about nucleic acids is correct?

Accepted Answer

DNA is composed of a deoxyribose sugar, phosphate group, and nitrogenous bases.

Question 11

Which of the following is a function of cellulose in plants?

Accepted Answer

Providing structural support to cell walls

Question 12

Which of the following best explains why humans cannot digest cellulose?

Accepted Answer

Humans lack the enzyme needed to hydrolyze the beta linkages in cellulose.

Question 13

Which of the following is TRUE about the structure of a phospholipid?

Accepted Answer

It contains a glycerol backbone, two fatty acid chains, and a phosphate group.

Question 14

Which of the following is a correct match between a carbohydrate and its function?

Accepted Answer

Glycogen – energy storage in animals

Question 15

Which of the following is a correct statement about the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

Question 16

Which of the following is a purine nitrogenous base found in nucleic acids?

Accepted Answer

Adenine

Question 17

Which of the following best describes the amphipathic nature of phospholipids?

Accepted Answer

They have both hydrophilic and hydrophobic regions.

Question 18

A triglyceride is formed by the reaction of:

Accepted Answer

One glycerol and three fatty acids

Question 19

Which of the following is a correct description of a glycosidic bond?

Accepted Answer

A covalent bond formed between two monosaccharides

Question 20

Which of the following is a correct statement about the function of chitin?

Accepted Answer

It provides structural support in the exoskeletons of arthropods.

Carbohydrates and Lipids: Structure, Function, and Classification

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