Question

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Answer 1

Ans 1.Three Common Shapes of Bacteria:-

(a) Coccus: spherical or round.

(b) Bacillus: rod shaped.

(c) Spiral: curve, spiral, or twisted.

Ans 2. In pairs:- diplococci

In long chains:- streptococci

In clusters :- staphylococci

Ans 3. The bacterial cell contains water (80% of total weight), proteins, polysaccharides, lipids, nucleic acids, mucopeptides and low molecular weight compounds.

Ans 4. Bacterial reproduction most commonly occurs by a kind of cell division called binary fission.

Ans 5. Bacterial spores are highly resistant, dormant structures (i.e. no metabolic activity) formed in response to adverse environmental conditions. They help in the survival of the organisms during adverse environmental conditions