BIOXI08: CELL-THE UNIT OF LIFE
334884
Which one of the following cellular parts is correctly described?
1 Lysosomes - Optimally active at a pH of about 8.5
2 Thylakoids – Flattened membranous sacs forming the grana of chloroplasts
3 Centrioles – A site for active RNA synthesis
4 Ribosomes – Those in chloroplasts are larger 80s while those in the cytoplasm are smaller (70s).
Explanation:
Thylakoids are arranged in stacks like the piles of coins called grana of the chloroplasts.