Biochemistry - Amino Acids

Question 1

All stereochemistry of the alpha-carbon is ___ for all chiral amino acids in eukaryotes.

Answer 1

L

Question 2

All amino acids are chiral except for which one?

Answer 2

Glycine

Question 3

All amino acids have the absolute S configuration except for which one?

Answer 3

Cysteine

Question 4

Amino acids are _______________, meaning that they can accept or donate protons.

Answer 4

Amphoteric

Question 5

The pKa of a group is the pH at which half of the species are ______________ and half are __________________.

Answer 5

Deprotonated

Protonated

Question 6

Histidine is generally considered ______________ at physiological pH as opposed to that taught in class.

Answer 6

Uncharged