Which one of the following statements about mycoplasmas is wrong?

They are pleomorphic.

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They are sensitive to penicillin.

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They cause diseases in plants.

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They are also called PPLO.

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Solution

The correct option is B They are sensitive to penicillin.
Penicillin inhibits cell wall synthesis and mycoplasmas lack cell walls.

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Organisms that are carriers of specific disease-causing germs, but they themselves don't cause any diseases, are called _______ .

Question 5

Read the following statements about diseases.

(i) They are caused by germs.

(ii) They are caused due to the lack of nutrients in our diet.

(iii) They can be passed on to another person through contact.

(iv) They can be prevented by taking a balanced diet.

Which pair of statements best describes a deficiency disease?

(a) (i) and (ii) .

(b) (ii) and (iii)

(d) (i) and (iii)

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