EVERYDAY SCIENCE

SCIENCE

VIRUS AND BACTERIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these can reproduce only when inside a host cell?
A
bacteria
B
virus
C
fungus
D
parasite
Explanation: 

Detailed explanation-1: -So, the answer is B. Virus, that reproduce inside a host cell. Note: Viruses replicate by lytic and lysogenic cycle.

Detailed explanation-2: -A lysogenic virus remains inactive for a period of time. In the lysogenic cycle, the viral DNA gets integrated with the host’s DNA and gets copied when the host cell replicates.

Detailed explanation-3: -Viruses reproduce only inside the cells of the host organism. It utilises its host cell’s machinery to make copies of themselves.

Detailed explanation-4: -They do not possess ribosomes and cannot independently form proteins from molecules of messenger RNA. Because of these limitations, viruses can replicate only within a living host cell. Therefore, viruses are obligate intracellular parasites.

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