NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

VIRUSES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
nonliving organisms that cannot grow and reproduce without a host or living cell
A
bacterium
B
viruses
C
fungus
D
cells
Explanation: 

Detailed explanation-1: -Viruses are considered as something between living and non-living because they do not grow or reproduce by themselves. This makes them non-living. However, when a virus enters a living cell of an organism, it obtains energy from the host cell and starts reproducing.

Detailed explanation-2: -Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.

Detailed explanation-3: -In order to replicate, viruses must first hijack the reproductive equipment of a host cell, redirecting it to ‘photocopy’ the genetic code of the virus and seal it inside a newly formed container, known as the capsid. Without a host cell, they simply can’t replicate.

Detailed explanation-4: -Solution: ∙ Viruses are classified as both living and non-living organisms because they exhibit both living and non-living features. ∙ They behave like non-living organisms in the open air, but when they enter the body of a living organism, they take on the characteristics of a living organism and begin reproducing.

Detailed explanation-5: -the flu, Ebola, measles and HIV. They are made up of DNA or RNA encapsulated in a protein shell and can only survive and replicate inside a living host, which could be any organism on earth.

There is 1 question to complete.