Which of the following structures is formed by the collective functioning of all membranous organelles in terms of their structure and function?

Adult human $RBCs$ are enucleate. Which of the following statement$(s)$ is/are most appropriate explanation for this feature?
$(1)$ They do not need to reproduce.
$(2)$ They are somatic cells.
$(3)$ They do not metabolise.
$(4)$ All their internal space is available for oxygen transport.

Identify the correct terms for the given analogy-based questions:
$(i)$ Plant cell : Cell wall :: Animal cell : .....
(ii) Protein synthesis : Rough Endoplasmic Reticulum :: Lipid synthesis : .....

In the following,which is not common for chloroplasts and mitochondria?

Which of the following are membrane-bound cell organelles?

Which pair of structures are usually found in both plant and animal cells?