Which of the following is an incorrect pair?

The contribution of cytoplasmic $DNA$ in cells to total $DNA$ is

Read the following statements and identify the correct option:
$(A)$ Prokaryotic cells lack a nuclear membrane,chloroplasts,mitochondria,microtubules,and pili.
$(B)$ Eukaryotic cells contain a nuclear membrane,chloroplasts,mitochondria,microtubules,and pili.
$(C)$ Many bacterial cells have small circular $DNA$ outside the genomic $DNA$.

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:

The resolving power of an electron microscope is approximately:

Identify the location and function of the following cell components:
$(i)$ Middle lamella
$(ii)$ Leucoplast
$(iii)$ Kinetochore