An overview of the cell, the basic unit of biology is at the link HERE. The link describes the two basic types of living cells (prokaryotes and eukaryotes) and gives descriptions and further links to the contents such as DNA and protein.
DNA and RNA make amino acids into protein (click HERE for picture in Wikipedia). The letters in the Wikipedia picture stand for subunits of DNA, RNA and proteins, which I will get to later. DNA is divided into genes and has other areas that don't make genes directly.
The Human Genome Project found that humans have about 20-30 thousand genes. This was a surprise, since many thought there would be at least 100,000. The genes are used as a code to make protein. However, many proteins can be modified so that there are about 1 million variations of proteins. Now scientists are discovering that proteins themselves and RNA, which copies the DNA, are involved in regulating types and amounts of protein. We will get into details later.
DNA and RNA make amino acids into protein (click HERE for picture in Wikipedia). The letters in the Wikipedia picture stand for subunits of DNA, RNA and proteins, which I will get to later. DNA is divided into genes and has other areas that don't make genes directly.
The Human Genome Project found that humans have about 20-30 thousand genes. This was a surprise, since many thought there would be at least 100,000. The genes are used as a code to make protein. However, many proteins can be modified so that there are about 1 million variations of proteins. Now scientists are discovering that proteins themselves and RNA, which copies the DNA, are involved in regulating types and amounts of protein. We will get into details later.
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