Which of the following amino acid/s has/have negatively charged R-group?
a) Glutamate
b) Aspartate
c) Serine
d) both a and b
Which of the following bond links amino acids in a protein molecule to each other?
a) phosphodiester bond
b) peptide bond
c) glycosidic bond
d) hydrogen bond
The peptide bond is formed between … of one amino acid and …….of another amino acid.
a) alpha carbon – amino group
b) amino group – R-group
c) amino group – carboxyl group
d) carboxyl group – R-group
A
chain containing three amino acids and two peptide bonds in known as……
a) dipeptide
b) tripeptide
c) polypeptide
d) both a and b
A chain containing many amino acids and many peptide bonds in known as…
a) dipeptide
b) tripeptide
c) polypeptide
d) both a and b
Which of the following protein/s is/are made up of two or more polypeptide chains?
a) haemoglobin
b) insulin
c) both a and b
d) none of them
Explanation: haemoglobin is oxygen carrying protein made of four polypeptide chains, while insulin has two polypeptide chains
