You are shown an electron micrograph of a mitochondrion. You are studying an electron transport system coupled to ATP synthesis in the laboratory. You add a substance which is an uncoupler. A pmf is created by an electrochemical gradient across a membrane.
Chloroplasts are green due to the chlorophyll which they contain.
After Trichonympha has been starved, it loses most of its internal subcellular membranes and organelles. Golgi, ER, nuclear envelope. You have isolated a subcellular organelle. The organelle is about 1 m in diameter and has a crystalline cored. During mitochondrial electron transport, electrons are transferred downhill along a reduction potential gradient from NADH to O2.