3U - Unit 5 MC Review

Which macromolecule provides the primary quick energy source for the body?

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

What is the monomer of proteins?

• Monosaccharide

• Amino acid

• Fatty acid

• Nucleotide

Which macromolecule stores genetic information?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

Which elements are found in carbohydrates?

• Carbon, hydrogen, oxygen

• Carbon, nitrogen, sulfur

• Carbon, hydrogen, nitrogen

• Carbon, oxygen, phosphorus

What does hydrolysis do to macromolecules?

• Builds them by removing water

• Breaks them down by adding water

• Combines them with lipids

• Neutralizes their chemical properties

Why are lipids ideal for long-term energy storage?

• They have fewer bonds than carbohydrates.

• They contain a high number of carbon-hydrogen bonds.

• They are broken down quickly for immediate use.

• They dissolve easily in water for transport.

What is the role of cellulose in plants?

• Store energy for later use

• Provide structural support in cell walls

• Transport nutrients between cells

• Build enzymes for photosynthesis

Which structural feature allows phospholipids to form cell membranes?

• Their hydrophilic tails attract water molecules.

• Their hydrophobic tails avoid water, forming a bilayer.

• Their ability to store energy in carbon bonds.

• Their rigid structure stabilizes the membrane.

Which macromolecule would be most beneficial for building muscle tissue?

• Nucleic acids

• Proteins

• Lipids

• Carbohydrates

If a person consumes carbohydrates before exercising, what immediate effect would it have on their energy levels?

• Energy levels decrease because carbohydrates take time to digest.

• Energy levels increase quickly as glucose enters the bloodstream.

• Energy levels remain constant because carbohydrates are stored for later.

• Energy levels decrease due to insulin release.