Amino Acids Lecture

Question 1

The building blocks of proteins

Answer 1

Amino Acids

Question 2

Isomer of all amino acids in the proteins in our body:

Isomer of Amino acids in few types of bacteria:

Answer 2

L-Isomer
D-Isomer

Question 3

The Essential Amino Acids which can be obtained through diet only
PVT TIM HALL

Answer 3

Phenylalanine
Valine
Threonine

Tryptophan
Isoleucine
Methionine

Histidine
Arginine
Leucine
Lysine

Question 4

Define these:
Complete protein

Incomplete Protein (Lysine, Tryptophan, Methionine)

Complementary Proteins

Answer 4

Complete protein foods contain all the essential amino acids in the proper amounts. Poultry, eggs, dairy and fish

Incomplete protein obtained from vegetable sources is low in one or more of the essential amino acids

Complementary proteins are incomplete proteins whichwhenservedtogether, complement each other and provide all the essential aminoacids

Question 5

residues that have been chemically modified after they have been in corporated into a polypeptide and also amino acids that occur in living organisms but are not found in proteins.

Answer 5

Nonstandard amino acids (uncommon amino acids)

Question 6

the most abundant protein in mammals, nonstandard amino acids

important structural constituents of the fibrous protein collagen

Answer 6

4-hydroxyproline 5-hydroxylysine

Question 7

Nonstandard amino acids constituent of several proteins involved in blood clotting

Answer 7

γ-carboxyglutamicacid

Question 8

An ion with + (positive) and – (negative) charges on the same molecule with a net zero charge

Answer 8

Zwitterions

Question 9

Reghulates the activity of proteins

Answer 9

O-Phosphoserine

Question 10

made up of two cysteine molecules or residues joined together by a disulfide bond

Answer 10

Cystine

Answer 11

Isoelectric Point