Question

Which of the following viruses is a plus-sense single-stranded RNA virus?

• A. Dengue virus
• B. Rotavirus
• C. Adenovirus
• D. Influenza virus

Hint:

Remember: Plus-sense ssRNA viruses like Dengue can directly use host ribosomes for translation, whereas negative-sense RNA viruses need RNA polymerase to synthesize a complementary strand.

Answer 1

The Correct Option is A

Step 1: Understand virus genome classification
Viruses are classified by their nucleic acid type: DNA or RNA, and whether their RNA is positive-sense (can be directly translated) or negative-sense (needs to be transcribed first).

Step 2: Identify the genome type of each virus
Dengue virus belongs to the Flaviviridae family and has positive-sense single-stranded RNA (ssRNA+).
Rotavirus is a double-stranded RNA (dsRNA) virus, part of the Reoviridae family.
Adenovirus is a double-stranded DNA virus.
Influenza virus is a negative-sense single-stranded RNA (ssRNA−) virus from the Orthomyxoviridae family.

Step 3: Determine the correct match
Only Dengue virus fits the criteria of being a plus-sense single-stranded RNA virus.