Bacteria do not have chloroplasts,but some bacteria are photoautotrophic in nature and perform photosynthesis. Which part of the bacterial cell performs this?

$(a)$ What is $DNA$? Where is it found?
$(b)$ Name the functional segment of $DNA$.

What is the name given to:
$(a)$ components of the cell?
$(b)$ energy currency of the cell?

If cells of onion peel and $RBC$ are separately kept in a hypotonic solution,what among the following will take place? Explain the reason for your answer.
$(a)$ Both the cells will swell.
$(b)$ $RBC$ will burst easily while cells of onion peel will resist the bursting to some extent.
$(c)$ Both $(a)$ and $(b)$ are correct.
$(d)$ $RBC$ and onion peel cells will behave similarly.

Which is the only cell organelle visible in a prokaryotic cell?

$(a)$ List any two structural differences and two similarities between a plant cell and an animal cell.
$(b)$ What would happen if an animal cell is kept in distilled water for $24$ hours?