10-30-13 Amino Acids

Question 1

T/F amino acids generat energy, used for protein synthesis

Answer 1

T

Question 2

All amino acids are chiral except (tryptophan/glycine) and also doesn’t have a (alpha/beta) version

Answer 2

glycine

beta

Question 3

The (amine/carboxyl/R) group is what gives unique properties to proteins

Answer 3

R group

Question 4

T/F amino acids help in the synthesis of Heme
Purines
Melanin
Pyrimidines
New proteins

Answer 4

T

Question 5

(alpha/beta)amino acids means the amino group is attached to the second carbon away from the carboxyl group

Answer 5

beta

Question 6

(alpha/beta)amino acids means the amino and carboxyl group is attached to the same carbon atom (called the  carbon)

Answer 6

alpha

Question 7

Only the (L/D) isomer and the (alpha/beta)form is used in natural proteins

Answer 7

L alpha

Question 8

A protein synthesized with only (L/D) amino acids called a racemic protein

Answer 8

D

Question 9

T/F enantiomers are resistant to enzymatic degradation therefore making it easier to crystallize pr,proteins for structural determinations

Answer 9

T

Question 10

(L/D) amino acids govern stationary phase cell wall remodeling in bacteria

Answer 10

D

Question 11

(L/D) amino acids appear to modulate synthesis of peptidoglycans

• influence peptidoglycan compostion, amoutn and strenght
• Via incorporation into polymer and regulation of synthetic enzymes

Answer 11

d

Question 12

(D-Met/D-Ala/D-Leu/D-Val) (Vibrio cholerae) and (D-Tyr/D-Phe/D-Arg) (Bacillus subtilis) appear to modulate synthesis of peptidoglycan
-pick two for each

Answer 12

D-Met and D-Leu (Vibrio cholerae) and D-Tyr and D-Phe (Bacillus subtilis)