X' is a type of cell organelle found in plant cells. One of its type 'Y' gets converted into another type 'Z' that provides colour to plant products like fruits. Identify X, Y and Z. Give one common feature of 'X' and mitochondria.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Answer:
(a) Identification:
- X = Plastid (family of plant organelles)
- Y = Chloroplast (photosynthetic plastid)
- Z = Chromoplast (pigmented plastid)
Interconversion: During fruit ripening, chloroplasts lose chlorophyll and accumulate carotenoids (red, orange, yellow pigments), transforming into chromoplasts.
(b) Common feature of plastids and mitochondria:
Both are double membrane-bound organelles with:
- Own circular DNA
- 70S ribosomes (prokaryotic type)
- Binary fission division
- Semi-autonomous nature
- Support endosymbiotic theory of origin
Suggested Q&A
General · Class 12- GeneralClass 12Electric Field at Centre of Ring with Non-Uniform Charge Distribution. Four quadrants carry linear charge densities: +2λ, −2λ, +λ, −λ. Find electric field at centre.
- GeneralClass 12P°(hexane) = 408 Torr, P°(heptane) = 141 Torr. x(hexane) = 0.300. Find Y₆ and Y₇.
- GeneralClass 122N₂O₅(g) → 4NO₂(g) + O₂(g). Initial P = 50 mmHg; P at 30 min = 87.5 mmHg. Find P at 60 min.
- GeneralClass 12What is the difference between psychosis and neurosis?
- GeneralClass 12What is the difference between prism and a pyramid?
- GeneralClass 12What is the difference between phrase and clause?