Question

Which one of the following is NOT a characteristic of plasmid?

• A. Help bacteria survive and reproduce under unfavourable conditions
• B. Double stranded
• C. Self-replicating
• D. Heredity material of bacterium

Hint:

{Plasmid = extra-chromosomal DNA}, not the main genetic material.

Answer 1

The Correct Option is D

Step 1: Understanding plasmids.
Plasmids are small, circular, double-stranded DNA molecules present in bacteria, separate from the main chromosomal DNA.

Step 2: Analysing characteristics.
Plasmids are self-replicating and often carry genes that help bacteria survive under adverse conditions, such as antibiotic resistance.
However, the primary hereditary material of a bacterium is its chromosomal DNA, not plasmids.

Step 3: Conclusion.
Therefore, the incorrect characteristic of plasmid is heredity material of bacterium.