Date

DNA

DNA

✤ DNA stands for deoxyribonucleic acid

✤ DNA carries all the genetic information of living organisms.

DNA

✤ DNA has a very specific shape called a double helix

✤ The shape was discovered by three scientists.

✤ James Watson, Francis Crick, and Rosalind Franklin

DNA

✤ DNA has section that are codes for making proteins.

✤ These specific codes are called genes.

What makes up DNA?

✤ DNA is composed of 3 major parts: Nitrogen Base, Sugar and a phosphate.

Parts of DNA

✤ DNA has four different Nitrogen Bases

✤ These are Adenine, Guanine, Thymine, and Cytosine

Nitrogen Bases

✤ Each Nitrogen Base pairs with another base.

✤ The nitrogen bases of Adenine are always paired with Thymine.

✤ The nitrogen bases of Cytosine are always paired with Guanine.

PRACTICE

✤ If DNA has the following sequence on one helix, what would be the other side:

✤ ATTAGCACGGCAT

✤ TAATCGTGCCGTA

✤ GCGATTAGCTAAT

✤ CGCTAATCGATTA