Amino acid 2

Question 1

Non polar side chains-

Answer 1

GLY
ALA
VAL
LEU
ISO
PHE
TRYP
METH
PRO

Question 2

polar uncharged
too tired surgeoen aspired gluteal cyst

Answer 2

SER
THRE
TY
ASPARAGINE
GLU
CYS

Question 3

BASIC CHARGED POLAR

Answer 3

ARG
HIS
LYS

Question 4

ACIDIC CHARGED POLAR

Answer 4

ASPARTIC ACID
GLUTAMIC ACID

Question 5

CATABOLISM OF GLYCOGENIC AA

Answer 5

produces pyruvate/ Kreb cycle intermediate

Question 6

catabolism of ketogenic AA

Answer 6

produces acetyl CoA or acetoacetyl CoA

Question 7

Glucogenic amino acids (UNDER METABOLIC FATE)

Answer 7

ALA
ARG
ASPARA
ASPART
CYS
GLUTAMATE
GLUTAMINE
GLY
PRO
SER
HIS
METH
VAL
THRE

Question 8

Ketogenic AA

Answer 8

leucine

Question 9

both gluco and keto

Answer 9

TYR
ISO
PHEN
TRYP
LYS

Question 10

define essential AA and give exp (under nutritional requirement)

Answer 10

cannot be synthesized by the body and must be obtained from diet for normal protein synthesis
ISO
LUE
THRE
LYS
METH
PHEN
TRYP
VAL

Question 11

DEFINE NON-ESSENTIAL AA AND GIVE EXPS

Answer 11

can be synthesized in sufficient amount from the intermediates of metabolism or from essential aa for cysteine and tyrosine

Question 12

semi-essential aa

Answer 12

ARG
HIS

Question 13

define Zwitterion

Answer 13

dipolar ion which is a hybrid molecule containing positive and negative ionic groups

Question 14

Explain isoelectric point/pH

Answer 14

• pH at where net charge of solute is zero
• no net migration takes place in an electric field
• the knowledge of this helps in isoelectric focusing used to separate proteins acc to pH
• at this pH,protein has least solubility and tend to precipitate
  -pH above Ip: net negative charge
  -pH below Ip: net positive charge

Question 15

What is the only AA that has buffering capacity?

Answer 15

• Histidine
  -pKa of its imidazole grp is 6.This permits it to func at neutral pH as either a base or an acid catalyst.
• best at buffering at pH 6