Respuesta :
An enzyme is a protein catalyst that lowers the activation energy required to undergo a chemical reaction, which speeds up the rate of reaction.
A prokaryotic cell does not contain a nucleus, while a eukaryotic cell does contain a nucleus.
In eukaryotic cells, a nucleus holds the cell's DNA. Ribosomes is the site of protein synthesis. Cell membrane acts as a layer of protection for the organelles. The cytoplasm holds the cell's shape and suspends the organelles within the cell.
Plant cells contain chloroplast, chlorophyll, and a cell wall. Animal cells contain centrioles.