In Amoeba and Paramecium, osmoregulation occurs through:
Pseudopodia
Nucleus
Contractile vacuole
Cytoplasm
Who first used the term 'antibiotic'?
Fleming
Pasteur
Waksman
Lister
In bacteria, plasmid is:
Extra-chromosomal material
Main DNA
Non functional DNA
Repetitive gene
Which one of the following has haplontic life cycle?
Funaria
Polytrichum
Ustilago
Wheat
Nif genes occur in which of the following organisms?
Penicillium
Aspergillus
Rhizobium
Streptococcus
Which one of the the following pairs is not correctly matched?
Streptomyces - Antibiotic
Serratia - Drug addiction
Spirulina - single cell protein
Rhizobium - biofertilizer
Tobacco mosaic virus is a tubular filament of size:
700 X 30nm
300 X 10 nm
300 X 5 nm
300 X 18 nm
Which type of association is involved in Mycorrhiza?
Parasitism
Symbiosis
Antagonism
Predation
Chromosomes in a bacterial cell can be 1-3 in number and:
Can be circular as well as linear with in the same cell
Are always circular
Are always linear
Can be either circular or linear, but never both with in the same cell
Viruses that infect bacteria multiply and cause their lysis are called:
Lysozyme
Lytic
Lipolytic
Lysogenic
