Chlorophyll is an orpiment that gives plants their green color. Plants practice chlorophyll forward with sunlight to make their nutrients. Chlorophyll molecules are respectively established in and around pigment protein systems called photosystems which are installed in the thylakoid layers of chloroplasts.
The <u>nuclear envelope</u> is composed of two concentric lipid bilayer membranes separated by an intermembrane space of about 20-40 nm. The outer membrane is continuous in many places with the rough endoplasmic reticulum. Like the rough ER the outer membrane of the nuclear envelope is dotted with ribosomes.
