NEET2012BotanyCell - The Unit of LifeActual
Which one of the following cellular parts is correctly described?
Options
- AThylakoids-Flattened membranous sacs forming the grana of chloroplasts
- BCentrioles-Sites for active RNA synthesis
- CRibosomes-Those on chloroplasts are larger (80 ~S ) while those in the cytoplasm are smaller (70 S)
- DLysosomes-Optimally active at a pH of about 8.5
Correct answer
A. Thylakoids-Flattened membranous sacs forming the grana of chloroplasts
Step-by-step solution
Centrioles are a membranous hollow microcylinders 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).