Which of the following organelles is not a part of the endomembrane system?

$i.$ 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 arena of cellular activities.
$iv.$ Various chemical reactions occur in cytoplasm to keep the cell in the living state.

Identify the correct sequence starting from the synthesis of protein to its transportation and packaging.

Phagocytosis was first of all seen by

In the given figure,what do the parts labeled '$a$' and '$b$' represent respectively?

Match the following and select the correct answer.

$(A)$ Centriole	$(i)$ Infoldings in mitochondria
$(B)$ Chlorophyll	$(ii)$ Thylakoids
$(C)$ Cristae	$(iii)$ Nucleic acids
$(D)$ Ribozymes	$(iv)$ Basal body of cilia or flagella