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DNA Bases and pairing rules

306398 — 2015-02-27 17:29:00 UTC

The bases of DNA are Adenine, Thymine, Cytosine, and Guanine. These are nitrogen bases. A pairs with T and G pairs with C. A and T have 2 hydrogen bonds. G and C have 3 hydrogen bonds. The certain pairing determines what biological instructions are for what.

Structure of DNA

306398 — 2015-02-27 17:38:20 UTC

DNA is a nucleic acid and is found in the nucleus of every human cell. DNA guides the cell and determines the genetic information for offspring. DNA is made up of four nucleotides. Every nucleotide has a sugar that is bound to a phosphate and also bound to a nitrogenous base. These nitrogenous bases are Adenine, Thymine, Guanine, and Cytosine. Adenine and Guanine are purines. Cytosine and Thymine are pyrimidines.

Function of DNA

306398 — 2015-02-27 17:44:54 UTC

The function of DNA is to code proteins. A message is sent to the amino acids which then figure out what kind of protein should be made. DNA also sends genetic information throughout the body. DNA also has the ability to replicate.

Parts of a Nucleotide

306398 — 2015-02-27 17:51:12 UTC

A nucleotide has a 5 sided sugar, a phosphate, and a nitrogenous base. The sugar and the phosphate make the backbone of the double helix. The bases are in the middle. There is a bond between the nucleotide, the phosphate, and the base that holds the backbone together.

The People that found the Shape of the DNA molecule

306398 — 2015-02-27 17:56:02 UTC

Rosalind Franklin had X-rays if the shape of DNA. Her assistant, Maurice Wilkins, showed the X-rays to Watson and Crick, two scientists without Rosalind knowing. The two scientists immediately knew that the shape of DNA was a spiral and that it was made of two nucleotides. They won the Nobel Prize for this, since Rosalind had died of cancer 4 years before.

BY: Alina Leholm

306398 — 2015-02-28 03:05:18 UTC