Question

Which statements are related with chloroplast:-

1) contain 70s ribosomes

2)clear division of labour

3)ATP formation

4) small single stranded circular DNA molecules

5)inner chloroplast membrane is relatively more permeable than outer

Answer 1

The complete structure of the chloroplast 70S ribosome in complex with translation factor pY
So statement (1) is correct
There is a clear division of labour within the chloroplast. The membrane system is responsible for the light reaction (trapping light energy and synthesis of ATP and NADPH) while dark reaction i.e., enzymatic reactions for the reduction of carbon dioxide into sugars using ATP and NADPH takes place in the stroma.
So statement (2) is correct
chloroplasts are larger and more complex than mitochondria, and they perform several critical tasks in addition to the generation of ATP.
So statement (3) is correct
Importantly, the DNA in chloroplasts is not the same as the DNA in the nucleus, and the DNA in the chloroplasts is circular in shape.
So statement (4) is correct
The outer membrane is permeable to most ions and metabolites, but the inner membrane of the chloroplast is highly specialised with transport proteins.
So statement (5) is wrong

Therefore statements 1,2,3,4 are related to chloroplasts