Which one of the following parts of a virus infected plant is free from virus?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Meristem
Even when a plant is infected with a virus, its meristem (the apical and axillary growing tips) is free of virus. A meristem can be removed and grown in a nutrient medium to get virus-free plants. This has been done for banana, sugarcane and potato.
(1) Meristem — Correct. This part is free of virus and is used in tissue culture.
(2) Stem — Incorrect. NCERT names only the meristem as free of virus. The stem of an infected plant carries the virus.
(3) Root — Incorrect. The root of an infected plant is not free of virus.
(4) Seed — Incorrect. NCERT does not name seed as virus-free. The part it names is the meristem.
NCERT Extract:
Biotechnological Applications in Agriculture – …
