1468 Biomolecules
1. Which does not show mutarotation
(a) Sucrose (b) Maltose
(c) Glucose (d) Fructose
2. Artificial silk is
(a) Polyamides (b) Polyesters
(c) Polyacids (d) Polysaccharides
3. Which of the following is a protein [Pb. CET 2003]
(a) Pepsin (b) Adrenaline
(c) ATP (d) Glutamin
4. Glucose gives many reactions of aldehyde,
because
[CPMT 1977]
(a) It is hydrolysed to acetaldehyde
(b) It is a polyhydroxy ketone
(c) It is a cyclic aldehyde
(d) It is a hemiacetal in equilibrium with its
aldehyde form in solution
5. Glucose in blood can be quantitatively determined
with
[JIPMER 2002]
(a) Tollen's reagent
(b) Benedict's solution
(c) Alkaline iodine solution
(d) Bromine water
6. Which of the following ions can cause coagulation
of proteins [Kerala (Med.) 1999]
(a)
Na
(b)
Ag
(c)
Ca
(d)
Mg
7. Glucose reacts with methyl alcohol to give [CPMT 1985]
(a)
methyl glucoside
(b)
methyl glucoside
(c) Both (a) and (b)
(d) None of these
8. Molisch's test is done for the detection of[BHU 1987]
(a) Alkyl halide (b) Carbohydrate
(c) Alkaloid (d) Fat
9. Which of the following is not an amino acid
[MP PET/PMT 1998]
(a) Glycine (b) Alanine
(c) Histidine (d) Benzidine
10. A substance forms zwitter ion. It can have
functional groups
[DCE 2002]
(a)
COOHNH ,
2
(b)
HSONH 32,
(c) Both (d) None of these
11. Which functional group participates in disulphide
bond formation in proteins [CBSE PMT 2005]
(a) Thiolactone (b) Thiol
(c) Thioether (d) Thioester
12. Schweitzer's reagent used for dissolving cellulose
in the manufacture of artificial silk is[Roorkee 1999]
(a)
OHCuSO 24 5.
(b)
CuI
(c)
443 ])([ SONHCu
(d)
223 )(.)( OHCuCOOCHCu
13. Which one of the following statements is true for
protein synthesis (translation) [AIIMS 2005]
(a) Amino acid are directly recognized by m-RNA
(b) The third base of the codon is less specific
(c) Only one codon codes for an amino acid
(d) Every t-RNA molecule has more than one
amino acid attachment site.
14. In both DNA and RNA, heterocyclic base and
phosphate ester linkages are at [AIEEE 2005]
(a)
5
C
and
2
C
respectively of the sugar molecule
(b)
2
C
and
5
C
respectively of the sugar molecule
(c)
1
C
and
5
C
respectively of the sugar molecule
(d)
5
C
and
1
C
respectively of the sugar molecule
15. Which of the following biomolecules contain non-
transition metal ion [KCET 2005]
(a) Vitamin
12
B
(b) Chlorophyll
(c) Haemoglobin (d) Insulin
16. An example of a sulphur containing amino acid is
[KCET 2005]
(a) Lysine (b) Serine
(c) Cysteine (d) Tyrosine
