Biological Molecules and Their Functions

What allows carbon to form complex structures like chains and rings?

• Its metallic properties

• Its ability to form ionic bonds

• Its four valence electrons

• Its high atomic number

Which ratio of elements is found in carbohydrates?

• 1:1:2

• 2:1:1

• 1:2:1

• 2:2:1

What is the main form of lipid used for long-term energy storage in the body?

• Cellulose

• Triglycerides

• Glycogen

• Chitin

What links amino acids together in proteins?

• Ionic bonds

• Covalent bonds

• Peptide bonds

• Hydrogen bonds

Which components make up a nucleotide in nucleic acids?

• A five-carbon sugar, a phosphate group, and a nitrogenous base

• A protein chain, a lipid molecule, and a carbohydrate

• A glucose molecule, a nitrogen atom, and a hydrogen atom

• A carbon ring, an oxygen atom, and a peptide bond