1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which of the following is a symbiotic nitrogen fixer?
A
Azotobacter
B
Frankia
C
Azolla
D
Glomus
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
T.O. Diener discovered a
A
free infectious DNA
B
infectious protein
C
bacteriophage
D
free infectious RNA.
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Bacterial leaf blight of rice is caused by a species
A
Alternaria
B
Erwinia
C
Xanthomonas
D
Pseudomonas.
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Thermococcus, Methanococcus and Methanobacterium exemplify
A
backteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
B
bacteria that contain a cytoskeleton and ribosomes
C
archaebacteria that contain protein homologous to eukaryotic core histones
D
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.
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