3. Amino Acids

Nitrogen is a critical component of which of the following classes of organic compounds?

Which of the following pairs of amino acids can form a salt bridge at physiological pH?

In a standard amino acid, which functional group is always acidic (able to donate a proton) under typical aqueous conditions?

Which amino acid is least likely to be found in one of the transmembrane domains of GPCR43?

Which one of the following is NOT a component of each amino acid monomer used to make proteins?

Which of the following best describes how amino acids are similar to carbohydrates and lipids?

Which of the following is true of complementary proteins?

In proteins, what structural feature primarily differentiates one amino acid from another?

When dietary amino acids are low, the body begins breaking down proteins from which source?

An ounce of most protein foods delivers about _____ of protein.

How many distinct aminoacyl-tRNA synthetase enzymes must be present in cells to properly synthesize proteins?

When an individual consumes excess protein and overall calories, what is the primary fate of the surplus amino acids in the body?

Which functional group on an amino acid is polar and can become positively charged at physiological pH?

Which two functional groups are always present in all standard amino acids?

How many standard amino acids are commonly found in proteins of living organisms?