1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Which of the following statements is not true for retroviruses?
A
DNA is not present at any stage in the life cycle of retroviruses.
B
Retroviruses carry gene for RNA-dependent DNA polymerase.
C
The genetic material in mature retroviruses is RNA.
D
Retroviruses are causative agents for certain kinds of cancer in man.
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Viruses that infect bacteria multiply and cause their lysis, are called
A
lysozymes
B
lipolytic
C
lytic
D
lysogenic.
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Phenetic classification of organisms is based on
A
observable characteristics of existing organisms
B
the ancestral lineage of existing organisms
C
dendrogram based on DNA characteristics.
D
sexual characteristics.
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A free living nitrogen-fixing cyanobacterium which can also symbiotic association with the water ferm Azolla is
A
Tolypothrix
B
Chlorella
C
Nostoc
D
Anabaena.
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