Question

The Baltimore Classification system categorizes viruses based on which characteristic?

• A. Shape of the virus
• B. Type of host infected
• C. Nature of genetic material and replication strategy
• D. Size of the virus

Hint:

Baltimore system → Classifies viruses by genome type + replication method.

Answer 1

The Correct Option is C

Concept: Viruses are classified in different ways based on their properties. The Baltimore Classification is a widely accepted system based on molecular biology.
Step 1: Basis of classification.
The Baltimore system classifies viruses according to:

• Type of nucleic acid (DNA or RNA)
• Single-stranded or double-stranded nature
• Method of replication and mRNA synthesis

Step 2: Groups in the system.
There are seven groups (I to VII), including:

• dsDNA viruses
• ssDNA viruses
• dsRNA viruses
• ssRNA (+/-) viruses
• Retroviruses

Step 3: Significance.
This classification helps in understanding viral replication mechanisms and guides antiviral strategies.
Step 4: Eliminating other options.

• Shape and size: Used in morphological classification
• Host type: Used in ecological classification

Step 5: Conclusion.
Thus, the Baltimore Classification is based on genetic material and replication strategy.