Think of it as a zipper. The top zipper is the leading strand, the bottom is the lagging, and the actual zipper thing is the helicase unwinding the 2 parts. You need the top and bottom strands to have a replication fork
1.Proteins. Proteins are found in the blood plasma and all over the body. The functions of protein include: repair and maintenance of body tissue, they are components of some hormones e.g. insulin, they make up enzymes, they make up transport molecules such as hemoglobin.
Lipids. These are used for energy storage and production. They provide energy for muscle and body processes.
Starch. Starch is converted into glucose for energy in the body.
Sugar . Sugar in the form of glucose is used by every cell in the body for energy.
Calcium. A mineral that is used by the body for building and keeping bones and teeth strong.
Chloride (NOT chlorine)ion. Acts as an electrolyte in the body.
Iron. Iron is an essential element of hemoglobin in the red blood cells .
both are chemical reactions
hope this helps :)
