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 cell membranes are mainly composed of
carbohydrates
proteins
phospholipids
fats
A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid ?
Three
Four
One
Two
Number of chiral carbon atoms in βD(+) glucose is
five
six
three
four
The correct statement in respect of protein haemoglobin is that it
functions as a catalyst for biological reactions
maintains blood sugar level
act as an oxygen carrier in the blood
forms antibodies and offers resistance to diseases.
The number of molecules of ATP produced in the lipid metabolism of a molecule of palmitic acid is
130
36
56
86
Enzymes take part in a reaction and
decrease the rate of a chemical reaction
increase the rate of a chemical reaction
both (a) and (b)
None of the above
Glucose molecule reacts with 'X' number of molecules of phenyl hydrozine to yield osazone
The value of 'X' is
one
two
Haemoglobin is
an enzyme
a globular protein
a vitamin
a carbohydrate
Diazo coupling is useful to prepare some
pesticides
dyes
vitamins
