DNA Structure

What is DNA: nucleotides DNA is a type of Nucleic Acid. Nucleic acids are long chains of __________________. nucleotides

What is DNA: nucleotide Labeled drawing of a ______________:

What is DNA: Deoxyribonucleic acid nucleus store and transmit DNA is found in the ____________ of the cell. Its function is to _____________________ ____________________. nucleus store and transmit genetic information

Structure of DNA: James Watson Francis Crick 1953 Scientists _________________ and ________________ are credited with discovering the structure of DNA in _______. Francis Crick 1953

Structure of DNA: Rosalind Franklin x-ray crystallography 37 However: _________________ played a role in helping them discover DNA’s structure. She used ________________________ to take pictures of DNA. Then she collaborated with Watson and Crick. Unfortunately she died at age _____ before any recognition was given to her. x-ray crystallography 37

Structure of DNA: 2 double helix center twisted ladder nitrogen bases DNA is a molecule made of ____ strands which wind around each other in the shape of a ______________. The nitrogen bases point toward the ___________ of the molecule. In other words a molecule of DNA looks like a _____________________ with steps made of ________________. double helix center twisted ladder nitrogen bases

Structure of DNA: Adenine Guanine Cytosine Thymine The four different nitrogen bases in DNA are: ____________(A), _____________(G), ____________(C), _____________(T). Adenine Guanine Cytosine Thymine

Structure of DNA: A T C G complimentary bases ____ always pairs with ____, and ____ always pairs with ____. The bases that pair with each other are called _____________________. C G complimentary bases

Structure of DNA: Categories Purines Pyrimidines Examples: Drawing: Nitrogen Bases can be separated into two different categories: Categories Purines Pyrimidines Examples: Drawing: Guanine Thymine Adenine Cytosine

Structure of DNA: thousands protein gene A single DNA molecule may contain ____________ of nucleotides (AKA: bases) The order of the nucleotides (bases) in a DNA is a code that provides instructions for making ____________. A segment of DNA that codes for a specific protein is called a ______. thousands protein gene

Structure of DNA: A segment of DNA that codes for a specific protein What is a gene: ______________________ _________________________. A segment of DNA that codes for a specific protein

What do proteins do? Make up all your traits – hair type and color (keratin), what color your skin is (melanin), what enzymes you have to break down food (lactase, peroxidase, amylase), how strong you are (actin/myosin)

Structure of DNA: Label the following: Base Pairs – Adenine, Guanine, Cytosine, Thymine 1 Nucleotide Backbone made of sugar