What is the NH₂ (nitrogen-containing) group on this amino acid called?

• amino group
• R group
• carboxyl group

Identify the element found in a protein that is not present in a carbohydrate

• Carbon
• Oxygen
• Hydrogen
• Nitrogen

What monomer of a protein is being shown?

• monosaccharide
• glycerol and fatty acids
• amino acid
• nucleotide

What is a type of protein that speeds up chemical reactions?

• sucrose
• insulin
• enzyme
• antibodies

Linking several amino acids together produces what polymer?

• polysaccharide
• polypeptide
• polynucleotide
• triglyceride

This protein is used to regulate blood sugar levels.

• hemoglobin
• collagen
• insulin
• antibodies

What are the bonds that connect amino acids in a protein called?

• peptide bonds
• ester bonds
• glycosidic bonds
• phosphodiester bonds

The info/code carried by DNA is based upon

• an amino acid sequence

• the sugars and phosphates that form the backbone

• the order of bases in the molecule

• the total number of nucleotides

How many amino acids are coded for by this sequence of nucleotides:
ATG GGA ACT CCA

• 4
• 2
• 6
• 12

If a methyl group (-CH₃), which does not like water, were at the 'R', the amino acid would likely be:

• Hydrophobic

• Hydrophilic

• Ionic

• Acidic