Which of the following is absent in an animal cell?

Which of the following statements are incorrect?
$(i)$ Plant cells have centrioles which are absent in almost all animal cells.
$(ii)$ Ribosomes are the site of protein synthesis.
$(iii)$ The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
$(iv)$ In animal cells, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements:

Prokaryotic cells do not have:

Cell organelles can be isolated independently by which of the following methods?

Which of the following is a vital stain?

Differentiate between a prokaryotic cell and a eukaryotic cell.