Red tides are caused by:
Volvox
Nostoc
Gonyaulax
Ceratium
Which one of the following statements about mycoplasma is wrong?
They are also called PPLO
They are pelomorphic
They are sensitive to penicillin
They cause disease in plants
Name the organisms which do not derive energy directly or indirectly from sun:
Chemosynthetic bacteria
Pathogenic bacteria
Symbiotic bacteria
Mould
Bacteria lack alternation of generation because there is:
Neither syngamy nor reduction division
No distinct chromosomes
Non conjugation
No exchange of genetic material
Which fungal disease spreads through seeds and flowers?
Loose smut of wheat
Corn stunt
Covered smut of barley
Soft rot of potato
Which is the correct sequence of phases of growth curve for bacteria.
Lag, log, stationary, decline
Lag, log, stationary.
Stationary, lag, log.
Decline, lag, log.
What is a plasmid?
Fragment of DNA which act as vector
Fragment which joins two genes
m RNA which acts as carrier
Autotrophic fragments
Which type of association is involved in Mycorrhiza?
Parasitism
Symbiosis
Antagonism
Predation
The cell wall of bacteria is composed of:
Murein
Chitin
Cellulose
Suberin
The cell wall of Gram positive bacteria is made up of:
Protein
Lipids and proteins
Cellulose and proteins