BICH 410 EXAM 2 MATERIAL QUESTIONS WITH 100% CORRECT ANSWERS { GRADED A+}

BICH 410 EXAM 2 MATERIAL

QUESTIONS WITH 100% CORRECT

ANSWERS { GRADED A+}




The _____ standard amino acids share a common structure but differ in

their ________ _______. - ✔✔20; side chains


Amino acids contain a central, ____________________ atom. -

✔✔tetrahedral alpha-carbon


______________ bonds link AA residues into a _____________. -

✔✔peptide bonds; polypeptide


What does it mean for an AA residue to have ionizable groups? -

✔✔Functional groups that act as proton-donor or proton acceptor (this

means they can participate in acid-base reactions)

,Although only a few amino acids have ionizable groups, what can we

say about all amino acids? - ✔✔that they all have ionizable alpha amino

and carboxylic groups (meaning they're polyprotic acids)

Know the general structure of an amino acid.




The amino acid is ________ around the alpha carbon. - ✔✔-




tetrahedral

All AAs except for _________ that are found in proteins possess a

___________ structure. - ✔✔proline and uncommon derivatives;

tetrahedral (pyramid-looking)


AAs are sorted into what groups based on their side chains? - ✔✔- non-

polar AAs

- polar, uncharged AAs

,- charged, acidic AAs

- charged, basic AAs

pKa of alpha amino group:




pKa o f the alpha carboxyl group: - ✔✔9




2


What are the amino acids with nonpolar side chains? - ✔✔- glycine

(kind of)

- alanine

- valine

- leucine

- isoleucine

- methionine

, - proline

- phenylalanine

- tryptophan




pneumonic:




"VAIL"

"PGPT"

+M


Which amino acid is neither polar nor non-polar? - ✔✔glycine


What are the amino acids with uncharged, polar side chains? - ✔✔-

serine

- threonine

- asparagine