A) mitochondria
B) chloroplast
C) endoplasmic reticulum
D) ribosome
Correct Answer: B
Solution :
A disc like green coloured structure present in the chloroplast is called grana (granum). Photochemical reactions of photosynthesis is completed in grana. Grana contain chlorophyll \[a\] and \[b\] in the ratio of\[3%\].
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