Which of the following events does not occur in the rough endoplasmic reticulum $(RER)$?

In plant cells,the dictyosomes are derived from

The Golgi apparatus plays a major role in -

Identify the components labelled as $A$,$B$,$C$,and $D$ in the diagram given below from the list $(i)$ to $(viii)$.
$(i)$ Cristae of mitochondria $(ii)$ Inner membrane of mitochondria $(iii)$ Cytoplasm $(iv)$ Smooth endoplasmic reticulum $(v)$ Rough endoplasmic reticulum $(vi)$ Mitochondrial matrix $(vii)$ Ribosome $(viii)$ Nucleus

Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport?

In animal cells,the synthesis of lipids like steroid hormones occurs in the .......... endoplasmic reticulum.