First, the basic function of an enzyme is to increase the rate of a reaction. Most cellular reactions occur about a million times faster than they would in the absence of an enzyme. Second, most enzymes act specifically with only one reactant (called a substrate) to produce products.
The two cell organelles involved in energy conversion are chloroplasts and mitochondria.
Chloroplasts are found plants. They are the photosynthesizing organelles of all photosynthetic eukaryotes.
Mitochondria are found in both plants and animals. It converts food such as sugars into the chemical ATP, the main source of energy for cell work.
Both organelles are said to evolve through a process called "endosymbiosis".
I believe that Fanny is prescribed some type of pills that mimics pregnancy by releasing hormones into the body. This may be prescribed as it allows women who want the positive feelings of pregnancy without bearing of children. If a woman can take medicine that mimics pregnancy, the body wont feel the need to be pregnant for real, which benefits the World state.