Biomolecules

• A
• B
• C
• D

The differences between two molecules include the type of sugar that forms a section of the molecules and the identity of one of the four nitrogenous bases that make up another section of the molecules. These two molecules are --

• proteins
• lipids
• nucleic acids
• complex carbohydrates

Carbohydrates are more easily metabolized than lipids. However, on a gram-for-gram basis lipids provide cells with more - 

• nitrogen
• proteins
• structure
• energy

Which of the following biomolecules typically contains both nitrogen and phosphate?

• lipid
• protein
• nucleic acid
• carbohydrate

Proteins and polysaccharides are polymers. These polymers are formed by dehydration synthesis. Which statement correctly identifies a difference in the structure of proteins and polysaccharides?

• Only polysaccharides are comprised of repeating units of cytosine, adenine, guanine, and thymine.
• Only proteins are formed from amino acids joined by peptide bonds.
• Only polysaccharides can be folded and twisted to very specific shapes.
• Only proteins can be large molecules with thousands of subunits.

• F
• G
• H
• J