15453.An example for symbiotic bacteria
Xanthomonas campestris
Rhizobium leguminosarum
Erwinia amylovora
Agrobacterium tumefaciens
15454.The asexual spores formed by Colletotrichum falcatum, Sphaerotheca and Rhizopus stolonifer are
Many celled
One celled
Pyriform in shape
Rod shaped
15455.Certain bacteria living in the soil poor in oxygen, convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as
Nitrogen fixing bacteria
Denitrifying bacteria
Ammonifying bacteria
Saprophytic bacteria
15458.Thermococcus, Methanococcus, and Methanobacterium exemplify
Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Archaebacteria that contain protein homologous to eukaryotic core histones
Bacteria that contain a cytoskeleton and ribosomes
Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
15459.Red rot disease of sugarcane is caused by
Phytophthora infestans
Helminthosporium oryzae
Colletotrichum falcatum
Xanthomonas
15460.Identify the correct pair of events when temperate phages infect bacteria :
(I) No prophages are formed.
(II) Bacterial cell undergoes many divisions
(III) Bacterial cell undergoes immediate lysis
(IV) Prophages are formed
The correct pair is
(I) No prophages are formed.
(II) Bacterial cell undergoes many divisions
(III) Bacterial cell undergoes immediate lysis
(IV) Prophages are formed
The correct pair is
I, II
II, III
III, IV
II, IV
15461.What is true about Archaebacteria?
All fossils
All photosynthetic
All Halophiles
Oldest living beings
15462.The Ti plasmid is often used for making transgenic plants. This plasmid is found in
Yeast as a 2 μm plasmid
Agrobacterium
Rhizobium of the roots of leguminous plants
Azotobacter