A) ThylakoidsFlattened membranous sacs forming the grana of chloroplasts
B) CentriolesSites for active RNA synthesis
C) RibosomesThose on chloroplasts are larger (80 S) while those in the cytoplasm are smaller (70 S)
D) LysosomesOptimally active at a pH of about 8.5
Correct Answer: A
Solution :
| [A] Centrioles are a membranous hollow micro cylinders occur in pair and play important role in cell division. Ribosomes in chloroplast are 70 S type while those of cytoplasm in eukaryotic cells are 80 S type. The enzymes of lysosome (called suicidal bag) function at acidic pH (i.e.5). |
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