i think it’s the last one on question number one, and the first one on question two.
When compounds lose electrons, they lose energy. When compounds gain electrons, they gain energy.
Oxidation occurs when a molecule loses an electron or increases its oxidation state. When a molecule is oxidized, it loses energy. In contrast, when a molecule is reduced, it gains one or more electrons. As you might have guessed, the molecule gains energy in the process.
DNA isn't really copied, it's more so split into 2 parts.
DNA is split into 2 parts during mitosis, more exactly the 5th stage called anaphase. chromosomes, which hold DNA< are split into 2 (genetically identical) groups, and each respective group goes to one spindle or another, readying for the last phase of mitosis and eventually cytokinesis.
<span>Food enters the duodenum- first part of the small intestine. </span>
