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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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Presentation Transcript
slide1
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?
slide4
The information

stored on DNA

from one human cell

Equals the amount of

information

in 1000, 500 page books.

slide5
2 Main Functions of DNA
  • Carry the Code of Life-instruction manual for every living organism
  • 2. Blueprint for making proteins
slide8
Nucleotidesare the basic structural units of DNA and consist of 3 things:
  • Phosphate 2. Sugar (Deoxyribose)
  • Nitrogen Base (Can be a Pyrimidine or Purine)
slide9
Nitrogen Bases

Purine = Adenine (A), Guanine (G)

Pyrimidine =Thymine (T), Cytosine (C)

*All 3 have a Y

Watson’s Discovery Watson's Ideas

slide10
Base Pairing

A-T

C-G

Nitrogen Bases attached to Deoxyribose (sugar)

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

slide11
Hydrogen bonds are 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

slide12
What makes up the “Backbone” of the DNA Double Helix?

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?

slide13
DNA must replicate or make a copy of itself before a cell can divide.
  • Play DNA Replication video from PBS in home folder
  • Remember Interphase?
slide14
DNA Replication – 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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