(b) a: pollutant
B: aerobic process
c: anaerobic process
(c) a: oxygen concentration
B: cO 2 concentration
c: temperature
(d) a: phosphate concentration
B: nitrate concentration
c: rate of photosynthesis
- rNa interference which is employed in making tobacco
plant resistant to Meloidogyne incognita is essentially
involved in
(a) preventing the process of replication of DNa
(b) preventing the process of translation of mrNa
(c) preventing the process of splicing of hnrNa
(d) preventing the process of transcription.
- match the entries in column-I with those of column-II
and choose the correct answer.
Column-I Column-II
a. restriction endonucleases (p) Kohler and milstein
B. Polymerase chain reaction (q) alec Jeffreys
c. DNa fingerprinting (r) arber
D. monoclonal antibodies (s) Kary mullis
(a) a - (r), B - (s), c - (q), D - (p)
(b) a - (r), B - (q), c - (s), D - (p)
(c) a - (q), B - (r), c - (s), D - (p)
(d) a - (q), B - (s), c - (r), D - (p)
- The basic procedure involved in the synthesis of
recombinant DNa molecule is depicted below. The
mistake in the procedure is
Mammalian DNA
Cut with
restriction
endonuclease 2
Cut with
restriction
endonuclease 1
Recombinant
molecule
(a) enzyme polymerase is not included
(b) the mammalian DNa is shown double stranded
(c) two different restriction enzymes are used
(d) only one fragment is inserted.
- Identify the desirable characteristics for a plasmid used
in rDNa technology from the following.
a. ability to multiply and express outside the host in a
bioreactor
B. a highly active promoter
c. a site at which replication can be initiated
D. One or more identifiable marker genes
E. One or more unique restriction sites
(a) a, c, D and E only (b) a, c and E only
(c) B, c, D and E only (d) B, c and E only
- an ecosystem which can be easily damaged but can
recover after some time if damaging effect stops will
be having
(a) low stability and high resilience
(b) high stability and low resilience
(c) low stability and low resilience
(d) high stability and high resilience.
- The correct sequence of seral stages in hydrosere is
(a) plankton, submerged, floating, reed swamp, sedge
meadow, woodland
(b) plankton, floating, submerged, reed swamp, sedge
meadow, woodland
(c) plankton, submerged, floating, sedge meadow, reed
swamp, woodland
(d) plankton, submerged, floating, sedge meadow,
woodland, reed swamp.
- In a particular climatic condition, decomposition rate is
slower if
(a) detritus is rich in nitrogen
(b) detritus is rich in humus
(c) detritus is rich in sugars
(d) detritus is rich in lignin and chitin.
- Given below is an imaginary pyramid of numbers. What
could be one of the possibilities about certain organisms
at some of the different levels?
TC
SC
PC
PP 1
500
50
10
(a) Level Pc is “insects” and level Sc is “small
insectivorous birds”.
(b) Level PP is “phytoplanktons” in sea and “whale” on
top level Tc.
(c) Level PP is “pipal trees” and the level Sc is
“sheep”.
(d) Level Pc is “rats” and level Sc is “cats”.
