Macromolecules Quiz

When an animal has to survive without food for a long time, it will eventually break down proteins for energy. However, this process occurs only after using the animal's reserves of _________ and ___________.

• Carbohydrates and Carbon Dioxide

• Nucleotides and Water

• Proteins and Fatty Acids

• Carbohydrates and Lipids

Answer explanation

Carbohydrates are the main source of energy for living things, once they are used up, energy reserves (fat) is used for energy. If both of these are burned through, the body must work hard to burn through protein (and break down muscle in the process).

Identify the macromolecule in the picture

• Nucleic Acids

• Fatty Acids

• Proteins

• Lipids

Answer explanation

This is a strand of DNA, which holds our genetic information and is stored in every cell in our body. DNA is a Nucleic Acid.

Which would one examine in order to find organic molecules that speed up or slow down certain chemical reactions?

• Fatty Acids

• Nucleic Acids

• Proteins

• Nucleotides

Answer explanation

Enzymes can help speed up reactions within the body (break down food, repair damage, etc.) - enzymes are a type of protein.

Which subunit makes up a protein molecule?

• Fatty Acid

• Amino Acid

• Nucleic Acid

• Monosaccharide

Answer explanation

"Subunit" means a small part of an entire unit. This can be used as another word for "monomer". Ex: one Lego block would be the "subunit" that is put together to build an entire Lego house. So, one monomer would be the subunit that is put together to build an entire macromolecule.

Identify the macromolecule in the picture.

• Protein

• Nucleic Acid

• Carbohydrate

• Lipid

Answer explanation

Look at the elements that make this macromolecule up - C,H,O. Lipids are made up of the elements C,H,O and have LONG "tails" or "chains" connected to a glycerol molecule.

Which organic molecule is part of an enzyme?

• Protein

• Nucleic Acid

• Fatty Acid

• Nucleotide

The picture indicates which macromolecule?

• Nucleic Acid

• Lipid

• Protein

• Carbohydrate

Answer explanation

The two macromolecules that contain only the elements C, H, O are carbohydrates and lipids. Lipids have tails - carbohydrates are RING shaped.

Proteins are made of monomers called ______________

• Nucleic Acids

• Amino Acids

• Fatty Acids

• Nucleotides

The picture indicates which macromolecule?

• Lipid

• Protein

• Carbohydrate

• Nucleic Acid

Answer explanation

Proteins contain the elements C, H, O, and N. "R" indicates that what molecule in that location can be many different molecules (variant).

- Hint: The picture shows an "Amino" group, which should tell you it is a protein, because amino acids are the monomer of proteins.