1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following bacteria has found extensive use in genetic engineering work in plants ?
A
Xanthomonas citri
B
Agrobacterium tumefaciens
C
Bacillus coagulens
D
Clostridium septicum
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Manipulation of DNA in genetic engineering became possible due to the discovery of : -
A
Transcriptase
B
DNA ligase
C
Primase
D
Restriction endonuclease
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A mutant strain of T4 – Bacteriophage, R-II, fails to lyse the E-Coli but when two strains RIIX and R-IIY are mixed then they lyse the E.Coli. What may be the possible reason : -
A
Both strains have different cistrons
B
Both strains have simillar cistrons
C
It is not mutated
D
Bacteriophage transforms in wild
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
In lederberg's replica plating experiment what shall be used to obtain streptomycin resistant strain : -
A
Only minimal medium
B
Complete medium and streptomycine
C
Only complete medium
D
Minimal medium and streptomycine
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