Question

The genome size of baculoviruses ranges from
A. 20-30 kbp
B. 40-50 kbp
C. 60-70 kbp
D. 80-180 kbp
Choose the correct answer from the options given below:

• A. A and D only
• B. D only
• C. C and B only
• D. A and C only

Hint:

Baculoviruses possess large, circular double-stranded DNA genomes of 80 to 180 kbp, which allow them to encode a wide array of proteins for host infection.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Baculoviruses are a family of large, rod-shaped, enveloped viruses with double-stranded DNA genomes.
They infect invertebrates, primarily insects of the order Lepidoptera, and are used as biological control agents in integrated pest management.

Step 2: Detailed Explanation:
Baculoviruses are characterized by their large, circular, supercoiled, double-stranded DNA genomes.
The genome size is relatively large compared to many other viruses, typically ranging from 80 to 180 kilobase pairs (kbp) (D).
This genome encodes between 100 and 180 proteins, which are required for viral replication, packaging, and host cell interaction.
The other ranges listed (20--30 kbp, 40--50 kbp, and 60--70 kbp) are characteristic of smaller DNA or RNA viruses (such as adenoviruses or certain bacteriophages) and do not represent the genome size of the Baculoviridae.
Therefore, only statement D describes the genome size of baculoviruses.

Step 3: Final Answer:
Consequently, the correct option is "D only".