1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
The colonies of recombinat bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of :
A
Insertional inactivation of alphagalactosidase in recombinant bacteria
B
Inactivation of glycosidase enzyme in recombinant bacteria
C
Insertional inactivation of alphagalactosidase in non-recombinant bacteria
D
Non-recombinant bacteria containing betagalactosidase
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Biolistics (gene-gun) is suitable for -
A
DNA finger printing
B
Constructing recombinant DNA by joining with vectors
C
Disarming pathogen vectors
D
Transformation of plant cells
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Which one of the following represents a palindromic sequence in DNA ?
A
5'-GAATTC-3'
3'-CTTAAG-5'
B
5'-GATACC-3'
3'-CCTAAG-5'
C
5'-CCAATG-3'
3'-GAATCC-5'
D
5'-CATTAG-3'
3'-GATAAC-5'
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
In genetic engineering, the antibiotics are used
A
As sequences from where replication starts
B
As selectable markers
C
To keep the cultures free of infection
D
To select healthy vectors
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