Which of the following statements is/are true about viruses A. They can reproduce on their own B. They derive nutrition from the host cells C. They lack cellular structure D. They help in decaying dead matter ?

A and B
A and D
B and C
C and D

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 3 : B and C

Concept:

Virus:

The term virus in Latin means 'poison'.
Viruses are small submicroscopic pathogen agents that infect all the different life forms from animals and plants to microbes.
TMV was the first discovered virus.
Virology is the study of viruses.
Viruses are mainly composed of nucleic acid and protein.
The protein coat is called the capsid.
The nucleic acid that is double or single or stranded DNA or RNA.

Explanation:

Viruses are microscopic, non-cellular means they lack cellular structure.
They can not reproduce on their own without their host cell.
- A virus can not replicate outside the living cell.
- It requires a host body to complete its replication.
- It lives in the host body as an obligate, intracellular parasite.
They also derive nutrition from the host cells.
- They enter the host cells and capture all their metabolic activity.
They do not help in decaying dead matter because viruses are not saprophytes.
- Saprophytes are the organisms that depend on the dead and decaying matter to complete their food requirement.
- Examples are fungi, bacteria, etc.

Thus, the correct statements are B and C.

4 views Answered 2022-09-04 04:29

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