Electron transport trains create a concentration gradient of hydrogen ions outside the mitochondria and fewer inside the mitochondria and creates energy(ATP) by diffusing the hydrogen ions back in
They appear larger than they really are.
6:
•picture on the left is a sperm cell, thing labelled is the TAIL
•picture on the right is a bacteria cell, thing labelled is PILI
7:
cilia are short hairs that are on cells where as flagella are very long hairs
therefore the structures below are FLAGELLA