Quiz on Lipids and Carbohydrates

Which of these is the chemical formula for a single sugar molecule, such as glucose, fructose, or galactose?

• NH₃

• NaHCO₃

• CO₂

• C₆H₁₂O₆

What are two purposes of carbohydrates?

(Select all that apply.)

• Structural support and protection

• Not soluble in water

• Storing and releasing energy

• Some are hormones

The monomer of a carbohydrate is a _, and the polymer of a carbohydrate is a _.

• starch,

  lipid

• monosaccharide,

  polysaccharide

• cellulose,

  glycogen

• disaccharide,

  triglyceride

Disaccharides are _ monosaccharides bonded together.

• 2

• 3

• 4

• 5

Which complex carbohydrate gives plants their structure and strength?

• glucose

• glycogen

• starch

• cellulose

What do all lipids have in common?

• They have 3 fatty acids.

• They are not water-soluble.

• They are oils.

• They are waxes.

What are the 3 main types of lipids?

(Check all that apply.)

• starch

• sugar

• oils

• fats

• waxes

What are the main purposes of lipids?

(Check all that apply.)

• energy storage

• protection

• oxygen transport

• some are hormones

• kidney function

Unsaturated fats have...

• at least one double bond between carbon atoms.

• all single bonds between carbon atoms.

• no carbon chains, only carbon rings.

• no fatty acids.

Saturated fats have...

• at least one double bond between carbon atoms.

• all single bonds between carbon atoms.

• no carbon chains, only carbon rings.

• no fatty acids.