Which of the following is not a feature of the plasmids?
Independent replication
Circular structure
Transferable
Single – stranded
Related Questions
All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct, except that Frankia
can live free in the soil
forms nitrogen-fixing root nodules on its host
produces spores
produces antibiotics effective against other soil bacteria
Which of the following characteristics is NOT associated with Mycoplasma?
Lack of a cell wall
Ability to survive without oxygen
Pathogenicity to plants and animals
Presence of a well-defined nucleus
Pasteurization is
Heating of liquid at 65°C
Heating of liquid between 65°C to 80°C followed by rapid cooling
Heating of solid at 65°C
None of the above
Harmogonia are reproductive structures of
Spirogyra
Ulothrix
Anabaena
Yeast
Choose the incorrect statement for cyanobacteria.
Perform oxygenic photosynthesis
Lack flagella throughout the life
Have specialised cells for nitrogen fixation
Have chlorophyll a and b similar to higher plants
Crown gall disease in plants is caused by
Ti-plasmid
Pi-plasmid
Mycoplasma
Virus
Which domain of life includes organisms capable of methanogenesis?
Bacteria
Archaea
Eukarya
None of the above
Mycoplasma, unique among bacteria, lack a cell wall. This characteristic makes them:
Highly susceptible to osmotic lysis
Unable to survive in isotonic solutions
Resistant to antibiotics that target cell wall synthesis
Incapable of any form of motility
The most primitive organisms showing oxygenic photosynthesis are
Green algae
Chrysophytes
Green and Purple Sulpher Bacteria
Cyanobacteria
Which of the following is not a feature of the plasmids?
Independent replication
Circular structure
Transferable
Single – stranded
