The filaments arising from desmosomes are called

In an animal cell,protein synthesis occurs in . . . . . . .

Is extragenomic $DNA$ present in prokaryotes and eukaryotes? If yes,indicate their location in both the types of organisms.

Which of the following statements is/are correct?
$(i)$ The shape of the cells may vary with the function they perform.
$(ii)$ Human $RBC$ is about $7.0 \; \mu m$ in diameter.
$(iii)$ Cytoplasm is the main area of cellular activities.
$(iv)$ Various chemical reactions occur in cytoplasm to keep the cell in the living state.

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Vacuole	$(P)$ Absent in human erythrocytes
$(2)$ Nucleus	$(Q)$ Perinuclear space absent
$(3)$ Nuclear envelope	$(R)$ Synthesis of $rRNA$
$(4)$ Nucleolus	$(S)$ Maintains turgor pressure in cells

Nucleic acid $(DNA)$ is $NOT$ found in: