1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Tobacco mosaic virus is a tubular filament of size
A
300 $$ \times $$ 10 nm
B
300 $$ \times $$ 5 nm
C
300 $$ \times $$ 20 nm
D
700 $$ \times $$ 30 nm
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Some bacteria are able to grow in streptomycin containing medium due to
A
natural selection
B
induced mutation
C
reproductive isolation
D
genetic drift.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In bacteria, plasmid is
A
extra chromosomal material
B
main DNA
C
non functional DNA
D
repetitive gene.
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In five kingdom system, the main basis of classification is
A
structure of nucleus
B
mode of nutrition
C
structure of cell wall
D
asexual reproduction.

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