Which one of the following structures represents the peptide chain ?
Commonly used antiseptic 'Dettol' is a mixture of
o-chlorophenoxylenol + terpineol
o-cresol + terpineol
phenol + terpineol
chloroxylenol + terpineol
The cell membranes are mainly composed of
carbohydrates
proteins
phospholipids
fats
Haemoglobin is
an enzyme
a globular protein
a vitamin
a carbohydrate
Which one of the following is employed as a tranquilizer ?
Equanil
Naproxen
Tetracycline
Chlorpheninamine
Which functional group participates in disulphide bond formation in proteins ?
Thiolactone
Thiol
Thioether
Thioester
In DNA, the complementary bases are
adenine and thymine, guanine and cytosine
uracil and adenine, cytosine and guanine
adenine and guanine, thymine and cytosine
adenine and thymine, guanine and uracil
Which is not true statement ?
α-carbon of α-amino acid is asymmetric
All proteins are found in L-form
Human body can synthesize all proteins they need
At pH= 7 both amino acid carboxylic groups exist in ionised form
The α D-glucose and β D-glucose differ from each other due to difference in carbon atom with respect to its
conformation
configuration
number of OH groups
size of hemiacetal ring
Phospholipids are esters of glycerol with
one carboxylic acid residue and two phosphate groups
three phosphate groups
three carboxylic acid residues
two carboxylic acid residues and one phosphate groups
