Biology
Microscopes and magnification
Cells 
Transporting substances
Enzymes
Enzymes are known as biological catalysts
They fit with a specific substrate using a lock and key mechanism. The substrate binds to the enzyme's active site where a reaction will take place.
Enzymes have an optimum pH and temperature at which they work best at.
They are involved in many biological activities.
Both plant and animal cells have a nucleus, cytoplasm, and cell membrane.
Cells are the building blocks of life.
Cells build up tissue. Tissue builds organs, and organs build up organ systems. These organ systems help your body perform daily functions.
Cells have certain organelles which help them perform specific tasks within the cell.
Microscopes allow us to view organisms which are too small to see.
They have a fine focusing wheel and a coarse focusing wheel to help zoom in on and increase the resolution of the subject you are viewing.
Electron microscopes have a much higher resolution than light microscopes.
We can use a microscope to view cells, enzymes, etc.
Animals and plants are made up of many cells. They are multicellular. An organism made up of one cell is a unicellular organism. Cells help carry out bodily functions, and they need to be able to transport substances in order to do this.
Osmosis is when water particles move down a concentration gradient with no energy through a partially permeable membrane.
Gas particles can be transferred through the air via diffusion. Diffusion is when particles move down a concentration gradient with no energy.
Active transport is when particles move up a concentration gradient using energy. This can be used to transport substances.
Active transport can be used to help carry substances through the body and into/out of cells. For example, oxygen can be carried from the lungs to individual cells. Transporting substances is a very important process in our body. Enzymes can help speed up these processes too.