Answer to Question 1
The transfer of 1or more electrons through oxidation and reduction reactions results in atoms becoming positively or negatively charged. These reduction-oxidation (or redox) reactions often take place simultaneously as coupled reactions. There are many important processes in the body that involve redox reactions that enable some molecules to transfer electrons to and from other molecules. For example, this is how cells use energy (ATP) to keep our bodies alive and functioning.
Answer to Question 2
d