Bioinorganic chemistry

  •  Bioinorganic chemistry: photosystems, porphyrins, metalloenzymes, oxygen transport, electron- transfer reactions; nitrogen fixation, metal complexes in medicine.
YEAR JUN-2016 DEC-2015 JUN-2015 DEC-2014 JUN-2014 DEC-2013 JUN-2013 DEC-2012 JUN-2012 DEC-2011 JUN-2011
No.of questions appeared  3 6 8 7 4 5 7 8 9 5 6

1.The actual base pairs present in the double helical structure of DNA containing adenine (A), thymine (T), cytosine (C) and guanine (G), are

(a) AG and CT

(b) AC and GT

(c) AG and AC

(d) AT and GC

 

2.The oxidation state of iron in met-hemoglobin is

(a) Three

(b) Two

(c) Four

(d) Zero

 

3.The changes (from A-D given below) which occur when O2 binds to hemerythrin are

(A) One iron atoms is oxidized

(B) Both the iron atoms are oxidized

(C) O2 binds to one iron atom and is also hydrogen bonded.

(D) O2 binds to both the iron atoms and is also hydrogen bonded.

(a) B and C

(b) B and D

(c) A and D

(d) A and C

 

4.In photosynthetic systems the redox metalloproteins involved in electron transfer are cytochrome (cyt, b),cytochrome bf complex (cyt bf) and plastocyamin (PC). The pathway of electron flow is

(a) PC–> cyt b –> cyt bf

(b) cyt bf –> cyt b –>PC

(c) cyt b–> cyt bf –> PC

(d) PC–> cyt bf –> cyt b

 

5.The correct set of the biologically essential elements is,

(1) Fe, Mo, Cu, Zn

(b) Fe, Cu, Co, Ru

(c) Cu, Mn, Zn, Ag

(d) Fe, Ru, Zn, Mg

 

6.Degradation of penicillin G

pencillien-csir-net-gate-chemical-sciences-june-2012

 

 

givespenicillamine that can utilize nitrogen, oxygen or sulfur atoms as donors to bind with lead(II), mercury (II) or copper(II). The structure of penicillamine is

kkkk

 

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