These microscopes use visible light and one or ... To study the kDNA structure, scientists used topoisomerases (enzymes that make specific cuts in the DNA) to decatenate the rings.

Researchers discovered the importance of an enzyme that promotes growth of certain lung cancers. Lung cancer is a ...

and on the right with the transmission electron microscope. Cytoplasm Where enzymes and other proteins are made. Location of reactions in anaerobic respiration. Nucleus Contains DNA which carries ...