The proteins and lipids,essential for building the cell membrane,are manufactured by

State whether the following statement is true or false:
The nucleus plays a central role in cellular reproduction.

In brief,state what happens when:
$(a)$ dry apricots are left for some time in pure water and later transferred to a sugar solution?
$(b)$ a Red Blood Cell $(RBC)$ is kept in a concentrated saline solution?
$(c)$ the plasma membrane of a cell breaks down?
$(d)$ Rhoeo leaves are boiled in water first and then a drop of sugar syrup is put on them?
$(e)$ the Golgi apparatus is removed from the cell?

Which part of the cell is called the brain of the cell?

Name two chemicals present in living organisms that have carbon,hydrogen,and oxygen as their main constituents. State their main function.

$(i)$ Differentiate between rough and smooth endoplasmic reticulum.
$(ii)$ How is endoplasmic reticulum important for membrane biogenesis?