Outside of a host cell, viruses do not use any energy. They only become active when they come into contact with a host cell. Once activated, they use the host cell's energy and tools to make more viruses. Because they do not use their own energy, some scientists do not consider them alive. Related Theory The only point favouring the virus as living entities is that they have the ability to reproduce (multiply) within the host by using host's machinery. The only point favouring the viruses as living entities is that they have the ability to reproduce (multiply)-though in the host using host's machinery.
Viruses are no more "alive" than isolated chromosomes because:
NEET UG 2003 — Botany Biological Classification
2003mcqeasy
Viruses are no more "alive" than isolated chromosomes because:
Official previous-year question
Held on 30 Apr 2003 · Verified 9 Jul 2026.
Options
- A
they require both RNA and DNA
- B
they both need food molecules
- C
they both require oxygen for respiration
- D
both require the environment of a cell to replicate
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