What is passive transport?

A Passive transport is a movement of ions and other atomic or molecular subatances across cell membranes without need of energy input.

Explanation:

Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy

Explanation:

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

answer; ///i believe the answer your looking for is (ribosomes);