Take this Quiz: A-Level Biology: Carbohydrates and Lipids | Zestly

Question 1

Which of the following are true regarding the formation and breakdown of disaccharides?

Accepted Answer

A condensation reaction between two monosaccharides forms a glycosidic bond and releases a water molecule.

Question 2

How does the structure of cellulose contribute to its function in plant cell walls?

Accepted Answer

It consists of long, straight chains of beta-glucose linked by hydrogen bonds to form microfibrils, providing structural strength.

Question 3

Which of the following describes the correct procedure and observation for the Benedict's test for a non-reducing sugar?

Accepted Answer

Hydrolyze the sample with dilute hydrochloric acid, neutralize with sodium hydrogencarbonate, then add Benedict's reagent and heat.

Question 4

Which of the following statements correctly characterize the differences between starch and glycogen?

Answer

Glycogen is more highly branched than starch, allowing for faster hydrolysis into glucose.

Answer

Starch is found in animal cells, while glycogen is found in plant cells.

Answer

Starch is composed of amylose and amylopectin, whereas glycogen is composed only of amylopectin-like chains.

Answer

Both starch and glycogen are polymers of beta-glucose.

Answer

Glycogen is a linear molecule, while starch is highly branched.

Question 5

What is the chemical nature of a triglyceride molecule?

Answer

A polymer formed from the condensation of three fatty acids and one glucose molecule.

Answer

A molecule formed by the condensation of one glycerol molecule and three fatty acid molecules.

Answer

A molecule containing two fatty acids, one glycerol, and one phosphate group.

Answer

A polymer of fatty acids linked by ester bonds.