Tuesday 12/2/2014

Q2 WK6 D1

Agenda: DNA

Notes: DNA Activity: DNA Reading and Coloring

Homework:

DNA Reading (Annotations) and Coloring Due Wednesday/Thursday 12/3-12/4/2014 for 30 Points

GRADEBOOK CLOSES FRIDAY 12/12/2014!!!

DNA: Deoxyribonucleic Acid

Q2 WK6 D1 11/18/13

Scientists of DNA

• 1953, James Watson & Francis Crick were accredited for discovering the structure of DNA• Awarded the Nobel Prize

for Physiology and Medicine in 1962; Watson, Crick and Maurice Wilkins

Should someone elsehave received credit???

Scientists of DNARosalind Franklin:Rosalind refined the technique of X-ray

crystallography, to study DNA and produced “Photo 51”

From photo 51, Rosalind determined that DNA is the shape of double helix

Watson & Crick used photo 51 and published their results before Franklin

Rosalind Franklin died in 1985

Location of DNA• DNA is coiled in chromosomes;

chromosomes are located in the nucleus.• DNA is the shape of double helix• Double stranded• Twisted• Similar to a spiral staircase

Draw me

Double Helix looks like…• If a DNA strand was

straightened, what would it look like???

A LADDER!

Make up of DNA• DNA is made up of Nucleotides strung together in a

certain order.• Each nucleotide contains…• Deoxyribose (Sugar)• Phosphate• Nitrogen base

• Adenine (A)• Thymine (T)• Guanine (G)• Cytosine (C)

How is DNA organized?• Sugar alternates with phosphate at the sides• The rungs (steps) of the DNA molecule are paired

nitrogen bases• The nitrogen bases pair in the following way…• Adenine ALWAYS pairs with Thymine (A-T)• Cytosine ALWAYS pairs with Guanine (C-G)

The rungs are connected at the sugars

Ended: Periods 4,5,6: 11/13

Nitrogen bases

deoxyribose

phosphate

Nitrogen Base: PRACTICE1. Adenine -2. Cytosine -3. Thymine -4. Adenine -5. Guanine -6. Guanine -7. Cytosine -8. Thymine -

Add to notebook check

Write the appropriate pair with the listed nitrogen base…

Nitrogen Base: answers• Thymine• Guanine• Adenine• Thymine• Cytosine• Cytosine• Guanine• Adenine

1. Adenine2. Cytosine3. Thymine4. Adenine5. Guanine6. Guanine7. Cytosine8. Thymine

DNA Reading & ColoringWorksheet