Obtaining the elements needed to make biological molecules | Starter Quiz | Oak National Academy

What are the monomers of complex carbohydrates?

• amino acids

• lipids

• sugars

Answer explanation

Sugars are joined together to make complex carbohydrates. For example, glucose is the monomer of starch, cellulose and glycogen.

Lipids are made from ___________ and __________.

• fatty acids

• glucose

• fats

• fructose

• glycerol

Answer explanation

Lipids are made of glycerol and fatty acids.

What type of molecules are joined together to form proteins?

(a)  

Answer explanation

Amino acids are joined together to form proteins. The number and order of the different amino acids determines the protein that is made.

What biological molecules are plant cell walls made from?

• Cellulose

• Starch

• Glycogen

• Monosaccharide

Answer explanation

Plant cell walls are made from cellulose. Cellulose is made from many glucose units joined together.

Match the biological molecule to it use.

• proteins

• For energy storage, insulation and to make cell membranes.

• lipids

• For growth and repair.

• carbohydrates

• For energy and storage.

Answer explanation

Carbohydrates are for energy and storage, proteins for growth and repair, and lipids are for energy storage, insulation and to make cell membranes.

Which of the following are disaccharides?

• Lactose

• Galactose

• Fructose

• Maltose

• Sucrose

Answer explanation

Disaccharides are made of two sugar molecules joined together. Galactose and fructose are both monomers.