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

Question 1

Which of the following are true regarding saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids contain only single carbon-carbon bonds.

Question 2

How do phospholipids behave in an aqueous environment?

Accepted Answer

They form a bilayer with the hydrophilic heads facing the water and hydrophobic tails facing inward.

Question 3

Which of the following correctly describes the emulsion test for lipids?

Accepted Answer

Mix the sample with ethanol, then add water; a cloudy white emulsion indicates lipids.

Question 4

Which of the following are monosaccharides?

Answer

Fructose

Answer

Sucrose

Answer

Maltose

Answer

Galactose

Answer

Starch

Question 5

What is the bond formed between two amino acids in a protein, and is it relevant to carbohydrate structure?

Answer

Glycosidic bond; it is the same bond found in carbohydrates.

Answer

Ester bond; it is the same bond found in triglycerides.

Answer

Peptide bond; it is the same bond found in carbohydrates.

Answer

Peptide bond; it is not found in carbohydrates.