Which of the following is/are a part of SARS CoV
A. Presence of Envelope
B. Positive-sense single stranded RNA
C. Spike protein
D. Tail
Choose the correct answer from the options given below:
A. Presence of Envelope
B. Positive-sense single stranded RNA
C. Spike protein
D. Tail
Choose the correct answer from the options given below:
Show Hint
- A and B only
- A and C only
- A, B and C only
- A, B and D only
The Correct Option is C
Solution and Explanation
SARS-CoV (Severe Acute Respiratory Syndrome Coronavirus) is a member of the Coronaviridae family.
Its viral particles possess a characteristic structural organization that can be identified by analyzing its envelope, genomic material, and surface proteins.
Step 2: Detailed Explanation:
Let us evaluate each of the structural features:
A. Presence of Envelope: Coronaviruses are enveloped viruses.
Their outer layer consists of a host-derived lipid bilayer membrane embedded with viral structural proteins. Thus, statement A is correct.
B. Positive-sense single stranded RNA: The genome of SARS-CoV is a single-stranded, positive-sense RNA molecule (\(+ssRNA\)) approximately 7 kilobases in length.
This genomic RNA is capped and polyadenylated, allowing it to function directly as mRNA inside the host cell cytoplasm. Thus, statement B is correct.
C. Spike protein: Coronaviruses have prominent, club-shaped projections on their surface called spike glycoproteins (S-proteins).
These spike proteins give the virus its crown-like appearance (corona) and bind to host cell receptors (such as ACE2) to facilitate entry. Thus, statement C is correct.
D. Tail: Helical or icosahedral animal viruses, including coronaviruses, do not possess a tail.
Tailed structures (such as contractile or non-contractile tails) are characteristic of bacteriophages (viruses that infect bacteria). Thus, statement D is incorrect.
Combining these points, the correct options are A, B, and C only.
Step 3: Final Answer:
Therefore, the correct option is A, B and C only.
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