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Which of the following is true for a virus :-
- a)That a virus does not possess d. s. DNA
- b)That a virus does not possess membrane of lipoproteins
- c)That a virus does not synthesize enzyme
- d)That a virus does not possess any enzyme
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following is true for a virus :-a)That a virus does not p...
Explanation:
• A virus is a small infectious agent that replicates only inside the living cells of an organism.
• A virus particle or virion consists of a core of nucleic acid, either RNA or DNA, surrounded by a protein coat called a capsid.
• Some viruses also have an outer envelope made of lipoproteins.
Option (a) - That a virus does not possess d. s. DNA
• This option is incorrect because some viruses possess double-stranded DNA.
• Examples: Herpesvirus, Adenovirus, Papillomavirus, etc.
Option (b) - That a virus does not possess a membrane of lipoproteins
• This option is partially incorrect because some viruses possess an outer envelope made of lipoproteins.
• Examples: Influenza virus, HIV, Hepatitis B virus, etc.
Option (c) - That a virus does not synthesize enzyme
• This option is correct because a virus does not have the machinery to synthesize enzymes on its own.
• A virus must hijack the host cell's machinery to carry out its life cycle.
• A virus can encode a limited number of proteins that are necessary for its replication, but it cannot synthesize all the enzymes required for replication.
Option (d) - That a virus does not possess any enzyme
• This option is incorrect because a virus can encode a limited number of enzymes that are necessary for its replication.
• Examples: Reverse transcriptase in retroviruses, RNA polymerase in RNA viruses, etc.
Conclusion:
• Among the given options, option (c) is the only correct statement about a virus.
• A virus does not synthesize enzymes on its own and must hijack the host cell's machinery to carry out its life cycle.
• A virus is a small infectious agent that replicates only inside the living cells of an organism.
• A virus particle or virion consists of a core of nucleic acid, either RNA or DNA, surrounded by a protein coat called a capsid.
• Some viruses also have an outer envelope made of lipoproteins.
Option (a) - That a virus does not possess d. s. DNA
• This option is incorrect because some viruses possess double-stranded DNA.
• Examples: Herpesvirus, Adenovirus, Papillomavirus, etc.
Option (b) - That a virus does not possess a membrane of lipoproteins
• This option is partially incorrect because some viruses possess an outer envelope made of lipoproteins.
• Examples: Influenza virus, HIV, Hepatitis B virus, etc.
Option (c) - That a virus does not synthesize enzyme
• This option is correct because a virus does not have the machinery to synthesize enzymes on its own.
• A virus must hijack the host cell's machinery to carry out its life cycle.
• A virus can encode a limited number of proteins that are necessary for its replication, but it cannot synthesize all the enzymes required for replication.
Option (d) - That a virus does not possess any enzyme
• This option is incorrect because a virus can encode a limited number of enzymes that are necessary for its replication.
• Examples: Reverse transcriptase in retroviruses, RNA polymerase in RNA viruses, etc.
Conclusion:
• Among the given options, option (c) is the only correct statement about a virus.
• A virus does not synthesize enzymes on its own and must hijack the host cell's machinery to carry out its life cycle.
Community Answer
Which of the following is true for a virus :-a)That a virus does not p...
Explanation:
A virus is a tiny infectious agent that replicates only inside the living cells of other organisms. It contains genetic material, either DNA or RNA, enclosed in a protein coat known as a capsid. Some viruses also have an outer envelope made of lipids. While there are many characteristics that distinguish viruses from other living organisms, the true statement among the options given is that a virus does not synthesize enzyme.
- Viruses do possess d.s. DNA or RNA: Different viruses have different types of genetic material. Some have double-stranded DNA, while others have single-stranded RNA, and still others have other variations.
- Viruses may possess membrane of lipoproteins: While not all viruses have an outer envelope, some do. This envelope is made of lipids and proteins, and it is derived from the host cell membrane as the virus leaves the host cell.
- Some viruses do possess enzyme: While viruses cannot replicate on their own, they do have some enzymes that help them to carry out their replication cycle. For example, reverse transcriptase is an enzyme found in retroviruses that allows them to use their RNA genome to make DNA.
Therefore, the correct answer is that a virus does not synthesize enzyme.
A virus is a tiny infectious agent that replicates only inside the living cells of other organisms. It contains genetic material, either DNA or RNA, enclosed in a protein coat known as a capsid. Some viruses also have an outer envelope made of lipids. While there are many characteristics that distinguish viruses from other living organisms, the true statement among the options given is that a virus does not synthesize enzyme.
- Viruses do possess d.s. DNA or RNA: Different viruses have different types of genetic material. Some have double-stranded DNA, while others have single-stranded RNA, and still others have other variations.
- Viruses may possess membrane of lipoproteins: While not all viruses have an outer envelope, some do. This envelope is made of lipids and proteins, and it is derived from the host cell membrane as the virus leaves the host cell.
- Some viruses do possess enzyme: While viruses cannot replicate on their own, they do have some enzymes that help them to carry out their replication cycle. For example, reverse transcriptase is an enzyme found in retroviruses that allows them to use their RNA genome to make DNA.
Therefore, the correct answer is that a virus does not synthesize enzyme.
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Which of the following is true for a virus :-a)That a virus does not possess d. s. DNAb)That a virus does not possess membrane of lipoproteinsc)That a virus does not synthesize enzymed)That a virus does not possess any enzymeCorrect answer is option 'C'. Can you explain this answer?
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