Q81
Genophore/bacterial genome or nucleoid is made of
Correct Answer
Option C
Solution
(c) The bacterial genome is made of single circular double stranded DNA without histone protein.
Biological Classification
Q82
Bacteria lack alternation of generation because there is
Correct Answer
Option A
Solution
(a) In bacteria asexual reproduction through binary fission is most common. Sexual reproduction is entirely absent.
Q83
Which of the following structures is not found in a prokaryotic cell?
Correct Answer
Option D
Solution
(d) Nuclear envelope is not found in a prokaryotic cell.
Q84
Which of the following components provides sticky character to the bacterial cell?
Correct Answer
Option C
Solution
(c) Sticky character of the bacterial wall is due to glycocalyx which is rich in glycoproteins.
Q85
The structures that help some bacteria to attach to rocks and/or host tissues are:
Correct Answer
Option A
Solution
(a) Fimbriae assist some bacteria in attaching to rocks or host body.
Q86
Which bacteria is utilized in gober gas plant?
Correct Answer
Option A
Solution
(a) Methanobacillus produces CH4 gas under anaerobic condition and is utilized in gobar gas plant.
Q87
Which one of the following statements about mycoplasma is wrong?
Correct Answer
Option B
Solution
(b) Mycoplasma are not sensitive to penicillin as they lack cell wall.
Q88
The motile bacteria are able to move by:
Correct Answer
Option B
Solution
(b) Motile bacteria have thin filamentous extensions on their cell wall called flagella.
Q89
Which of the following are likely to be present in deep sea water?
Correct Answer
Option D
Solution
(d) Archaebacteria live in some of the most harsh habitats including deep sea water.
Q90
Specialized cells for fixing atmospheric nitrogen in Nostoc are
Correct Answer
Option B
Solution
(b) Heterocysts are specialised cells in Nostoc which perform biological nitrogen fixation.
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