Answer the following Objective Questions.
1) Increase the intensity of the signal is called .
a) Magnetic effect. b) protonation effect.
c) Nuclear over hauser effect. d) None of these .
2) COSY stands for..........
a) Common spectroscopy b) Correlation spectroscopy
c) correacted spectroscopy d) Cos Spectroscopy
3) Uric acid is vigrous oxidation with alkile KMnO4 it gives ?
a) Allation +CO2 b) Allaxon + wax
c)Allation + urea d)Allaxon + CO2
4) Caffeine moleculer formula is
a)C4H10N4O3 b) C4H8N4O2
c)C4H10N3O2 d) C4H10N4O2
5) Which compound caffeine can made ?
a)urea b)2,4,8trichloro purine
c)xanthine d)All of above
6) Which synthesis is not applicable for synthesis of thymine .
a)traube b)intermolecular anti
c)wheeler d)bergmann
7) RNA consist as a ....
a) Double standed helix
b) single standed helix
c) double or single standed helix
d) None of these
8) DNA does not consist of these compound .
a)Adanine b)Guanine
c)Thymine d)Uracil
9) Ribofuranose which type of oxygen bond ?
a)1,4 -C b)1,3-C c)1,5-C d)1,2-C
10) Which steps is not involved in protein synthesis?
a) Production of m-RNA & its combination with r-RNA
b) Activation of amino acids
c) Addition of nucleotides to transfer -RNA to (s-RNA)
d) none of these .
11) Monosaccharide having of two nature of carbonyl group is
a)Aldose b)ketoses
c)Ethet d)A&B both
12) Which of the following are example of trisaccharides?
a)sucrose b)raffinose
c)maltose d)lactose
13) what is mutarotation ?
a) The change in specific rotation due to a change between isomers
b) any change in specific rotation
c) the phenomenon where some molecules spontaneously change the specific rotation
d) the change between isomers in a solutions
14) The microorganisms secrete an enzyme which helps in the digestion of cellulose as
a)cellulase b)catalase
c)sucrase d)pepsin
15) Starch is most common storage from of
a)lipids b)fats
c)amino acids d)carbohydrates
16) How many chiral carbon present in cis cyclopropane 1,2-di carboxylic acid
a)0 b)1 c)2 d)3
17) Cis cyclohexane 1,2 dicarboxylic acid is
a) optically active because it has a plane of symmetry
b) optically inactive because it has a plane of symmetry
c) optically iactive because no element of symmetry
d) None of these
18) Stability depends on
a) dipole-dipole interaction
b) possibility of H-bind
c) both a&b
d) none of these
19) How many sterioisomers in Cis cyclohexane 1,2 dicarboxylic acid
a)3 b)4 c)5 d)0
20) How many π-bond present in propane 2-ol?
a)0 b)1 c)2 d)none
21) (R) - butane -2-ol and (S)-butane 2-ol are...
a)Diasteriomers b)Enantiomers
c)meso d)identical
22) HMQC is....
a) carbon detected HETCOR
b) proton detected HETCOR
c) 1H - 13C Correlation experiment
d) B & C both
23) HMBC is.....
a) Proton detect experiment for 1H - 13C
b) Proton detect experiment for 2& 3 bonded 1H - 13C coupling
c) A&B both
d) None of these
24) Most modern spectrometer employ a technique for COSY which is known as ....
a)pulse cycling b)proton cycling
c)phase cycling d)None of these
25) 1H-1H cosy spectra are interpreted as giving rise to cross peaks for all protons which have significant .
a)phase cycling b) decoupling
c)J-J coupling d)None of these
26) is not part of 1H--1H cosy spectrum proper ?
a)Ipsenol b)1D - spectra
c)2D - spectra d)all of above
27) HETCOR experiments correlates ...........
a)1H - 13C b)1H - 1H
c)NOE d)None of these
28) 1H - 13C HETCOR are ...........
a) two bonded coupling
b) redical coupling
c) one bonded coupling
d) No coupling
29) Which of the following are the female sex hormones ?
a)oestrogens b)androgens
c)gastrogens d)A&C Both
30) Progesterone found from the
a)placenta b)pregnancy urine
c)adrenal cortex d)All of above
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