poison
secretion
cell
venom
A. poison
balanced
threshold
transitional
none of these
viruses
bacteria
algae
fungi
Smith
Temin
Twort
Mayer
can grow inside a living host
can multiply inside a living host
can undergo mutation inside a living host
are non-cellular
DNA
RNA
DNA and RNA
None of these
poison
secretion
cell
venom
Early blight of potato
Late blight of potato
Leaf roll of potato
None of these
Tobacco mosaic virus
Potato mosaic virus
Cauliflower mosaic virus
Tomato mosaic virus
D. Iwanowski
F.C. Bawden
W.M. Stanley
K.M.Smith
DNA
RNA
both DNA and RNA
none of these
viruses
bacteria
fungi
none of these
Safferman and Morris
Lederberg and Zinder
Smithv and Knight
None of these
double stranded RNA
single stranded DNA
double stranded DNA
single stranded RNA
RNA of the virus
DNA of the virus
RNA of the host
Ribosome of the host
prophage
vegephaege
cyanophage
phycophage
vaccination against small pox
vaccination against chicken pox
immunization against small pox
immunization against chickcn pox
bacteriophage
coliphage
phytophage
zoophage
picornaviruses
binal viruses
riboviruses
none of these
RNA
DNA
DNA and RNA
none of these
antivirin
antigen
virion
interferon
viruses
slimemoulds
fungi
bacterium
multiply only in the host cytoplasm
are made up of proteins only
behave as if they were plants
occur only inside bacteria
lysis
lysogeny
prophage
attenuated virus
Stanley
Iwanowiski
Twort
Herelle
living organisms
non-living organisms
a transitional group between living and non-living world
living organisms which have lost the power of multiplication
Tobacco mosaic virus
Poxvirus
Potato spindle tuber virus
None of these
Replication
Mutation
Production of energy
Growth
lesion
lysis
autolysis
haemolysis
1 nm
3 nm
6 nm
2 nm
are colourless
have enzymes
have nucleic acids
none of these