picornaviruses
binal viruses
riboviruses
none of these
B. binal viruses
DNA
RNA
DNA and RNA
None of these
lysis
lysogeny
prophage
attenuated virus
are colourless
have enzymes
have nucleic acids
none of these
Protein part of virus
Nucleic part of virus
Both (a) and (b)
None of these
plaque
phnge
streak
krnn/
prophage
vegephaege
cyanophage
phycophage
episome
mesosome
free DNA
T-phage
viruses
slimemoulds
fungi
bacterium
poison
secretion
cell
venom
Stanley
Iwanowiski
Twort
Herelle
Replication
Mutation
Production of energy
Growth
viruses
bacteria
fungi
none of these
antivirin
antigen
virion
interferon
balanced
threshold
transitional
none of these
living organisms
non-living organisms
a transitional group between living and non-living world
living organisms which have lost the power of multiplication
virion
vira
viroid
none of these
multiply only in the host cytoplasm
are made up of proteins only
behave as if they were plants
occur only inside bacteria
Smith
Temin
Twort
Mayer
a buch of genomes which are looking for a suitable host for replication
micro-organisms which contains DNA only
smallest micro-organisms causing disease
micro-organisms which contains RNA only
Early blight of potato
Late blight of potato
Leaf roll of potato
None of these
can grow inside a living host
can multiply inside a living host
can undergo mutation inside a living host
are non-cellular
Safferman and Morris
Lederberg and Zinder
Smithv and Knight
None of these
1 nm
3 nm
6 nm
2 nm
bacteriophage
coliphage
phytophage
zoophage
DNA
RNA
both DNA and RNA
none of these
they kill all bacteria which form host of viruses
viruses have no metabolism of their own
viruses form endospores
viruses are too small in size
lesion
lysis
autolysis
haemolysis
double stranded RNA
single stranded DNA
double stranded DNA
single stranded RNA
D. Iwanowski
F.C. Bawden
W.M. Stanley
K.M.Smith
viruses
bacteria
algae
fungi