Which of the following statements is true regarding viruses?

  • A
    They are ubiquitous and extremely small in size.
  • B
    They can pass through bacteria-proof filters.
  • C
    They are obligate parasites in living cells.
  • D
    All of the above $(A), (B),$ and $(C)$.

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Similar Questions

Assertion $A$: Viroids and viruses can pass through bacteria-proof filters.
Reason $R$: Bacteria are retained by bacteria-proof filters.
Which option is correct for Assertion $A$ and Reason $R$?

Match the following columns:
Column-$I$ Column-$II$
$1$. Ivanowsky $p$. Discovered viroids.
$2$. Tulasne $q$. Studied algae.
$3$. Diener $r$. Coined the term virus.
$4$. Beijerinck $s$. First to discover lichen.
$t$. Studied mycology.
$u$. First to discover $TMV$.

Which nucleic acid is present in viruses?

Viruses are considered as a link between living and non-living organisms because

Most lichens consist of:

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