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Q. No.A bacterium divides every 35 minutes. If a culture containing 105 cells/mL is grown for 175 minutes, what will be the cell concentration/mL after 175 minutes?
(1) 5 × 105 cells
(2) 35 × 105 cells
(3) 32 × 105 cells
(4) 4.175 × 105 cells
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Dikaryotisation (n + n) in Agaricus is brought about by
(1) clamp connections
(2) somatogamay between two hyphae of different strains
(3) Both (1) and (2) are correct
(4) basidiospores
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'Red tide' is caused by
(1) Gonyaulax
(2) Ceratium
(3) Triceratium
(4) All of these
Difficulty Level:
Which one of the following shows heterothallism?
(1) Rhizopus
(2) Bacterium
(3) Cycas
(4) Ricinus
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The common characteristic showning by mushroom, smut and rust
(1) is characterised by presence of basidiocarps
(2) is characterised by presence of ascocarps
(3) all are pathogen
(4) all are saprophytic in nature
Difficulty Level:
Which one exhibits the character of a protozoan during one phase of its life cycle and character of fungi in another phase of its life cycle?
(1) Water moulds
(2) Psilophytes
(3) Slime moulds
(4) Diatoms
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Spirochaetes is/are
(1) a class of viruses
(2) myxobacteria
(3) spiral-shaped bacteria
(4) richittsias
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Spirochaetes is are
(1) a class of insects
(2) a class of viruses
(3) bacteria
(4) fungi
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The metachromatic granules are
(1) present in plants cell at metaphase stage
(2) inclusion bodies in bacteria
(3) produced in insects during metamorphosis
(4) chromatophores in animals skin
Difficulty Level:
Clamp connection is found in
(1) Basidiomycetes
(2) Ascomycetes
(3) Saccharomycetes
(4) Haplomycetes
Difficulty Level:
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