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DNA. Deoxyribose Nucleic Acid. DNA…your book of life. http://www.cbsnews.com/8301-3445_162-57556650/a-need-to-know-the-worst-news-you-will-ever-hear/ Would you want to know?. The information stored on DNA from one human cell. Equals the amount of information in 1000, 500 page books.

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DNA

Deoxyribose Nucleic Acid


Dna your book of life
DNA…your book of life

  • http://www.cbsnews.com/8301-3445_162-57556650/a-need-to-know-the-worst-news-you-will-ever-hear/

  • Would you want to know?


The information

stored on DNA

from one human cell

Equals the amount of

information

in 1000, 500 page books.


  • 2 Main Functions of DNA

  • Carry the Code of Life-instruction manual for every living organism

  • 2. Blueprint for making proteins



Double Helix=shape of DNA James Watson & Francis Crick


  • Nucleotides James Watson & Francis Crickare the basic structural units of DNA and consist of 3 things:

  • Phosphate 2. Sugar (Deoxyribose)

  • Nitrogen Base (Can be a Pyrimidine or Purine)


Nitrogen Bases James Watson & Francis Crick

Purine = Adenine (A), Guanine (G)

Pyrimidine =Thymine (T), Cytosine (C)

*All 3 have a Y

Watson’s Discovery Watson's Ideas


Base Pairing James Watson & Francis Crick

A-T

C-G

Nitrogen Bases attached to Deoxyribose (sugar)

http://www.dnalc.org/resources/3d/21-chargaff-ratios.html Chagraff’s Rule


Hydrogen bonds James Watson & Francis Crickare the glue that hold everything together

Sugar – Deoxyribose

Phosphate Groups (spacer)

Nitrogen Bases – Code of Life in ATCG

Thymine always pairs with Adenine

Guanine always pairs with Cytosine

GC

AT

CG

T A

GC

G C


What makes up the “Backbone” of the DNA Double Helix? James Watson & Francis Crick

Which structure in the backbone is directly attached to the Nitrogen bases?

What are the “spacers” between each step?

Why were Mike&Ikes a good example for the purines?

Why were Skittles a good example for the pyrimidines?



DNA Replication can divide. – DNA makes a copy of itself

Important during meiosis & mitosis because it makes sure the daughter cells have the appropriate number of chromosomes.

DNAi animation

If the original strand of DNA is AATTGGCC

The complementary strand of DNA is TTAACCGG


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