Which of the following statement(s) is/are true about viruses?
(i) Viruses are smallest among all microorganisms.
(ii) Viruses can live freely.
(iii) Viruses use the host cell to reproduce.
(iv) Viruses do not have DNA or RNA.

(i) and (iii)

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(ii) and (iv)

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Only (i)

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(iii) and (iv)

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Solution

The correct option is A (i) and (iii)
Viruses are smallest among all microorganisms. Viruses consist of a genetic material (DNA or RNA) enclosed within a protein coat. Viruses lack cellular framework and need the host cell to multiply (reproduce).

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Question 9
Making anti-viral drugs is more difficult than making anti-bacterial medicines because

(a) viruses make use of the host machinery
(b) viruses are on the border line of living and non-living
(c) viruses have very few biochemical mechanisms of their own
(d) viruses have a protein coat

Q. Which of the following statement(s) is/are true about viruses?
(i) Viruses are smallest among all microorganisms.
(ii) Viruses can live freely.
(iii) Viruses use the host cell to reproduce.
(iv) Viruses do not have DNA or RNA.

Which of the following statement(s) is/are true about viruses?

i. Viruses are neither living or non-living organisms.

ii. Viruses can live freely.

iii. Viruses use the host cell to reproduce.

iv. Viruses do not have DNA or RNA.

Q. Viruses are non-cellular entities that can replicate only after they have infected a host cell. Which of the following kingdoms do viruses belong to?

Statement 1: Viruses are dead when they are outside the host body.
Statement 2: Viruses do not have a cellular organisation.

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Which of the following statement(s) is/are true about viruses? (i) Viruses are smallest among all microorganisms. (ii) Viruses can live freely. (iii) Viruses use the host cell to reproduce. (iv) Viruses do not have DNA or RNA.

The correct option is A (i) and (iii)Viruses are smallest among all microorganisms. Viruses consist of a genetic material (DNA or RNA) enclosed within a protein coat. Viruses lack cellular framework and need the host cell to multiply (reproduce).

Which of the following statement(s) is/are true about viruses?
(i) Viruses are smallest among all microorganisms.
(ii) Viruses can live freely.
(iii) Viruses use the host cell to reproduce.
(iv) Viruses do not have DNA or RNA.

The correct option is A (i) and (iii)
Viruses are smallest among all microorganisms. Viruses consist of a genetic material (DNA or RNA) enclosed within a protein coat. Viruses lack cellular framework and need the host cell to multiply (reproduce).