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

The plastids which are coloured,green and colourless are known respectively as

Which plastid would you expect to be present in $(i)$ Papaya and $(ii)$ Grass?

State whether the following statement is true or false:
$RER$ looks smooth under a microscope because it has particles called ribosomes attached to its surface.

Lipid molecules in the cell are synthesized by

In addition to the green pigment chlorophyll,chloroplasts also contain two other pigments. These are: