AP Biology Discussion Notes

Tuesday 1/6/2015

Goals for Today• Be able to name the scientists that helped

build our knowledge of DNA and be able to describe their contributions

• Be able to discuss how scientific understanding is built

• Be able to list or understand the contributions of less known scientists

• Be name the 3 basic components of DNA

Question of the Day 1/6

• If you have a species with 35% Cytosine what percentage of the other base pairs would there be? –A-–G-–T-

2.Who discovered this “rule”

Question of the Day 1/6

• If you have a species with 35% Cytosine what percentage of the other base pairs would there be? –A-–G-–T-

2.Who discovered this “rule”

Turn in Goals

Base Pairing Purines:

Pyrimidines:

Purine - Pyrimidine

Base Pairing Look carefully

—

Why can A only pair with T and C can only pair with G???

Base Pairing

Which pairs would come apart more easily? (Take less _______ to pull apart)

Base Pairing Which DNA strand

would come apart at a lower temperature?

1.25% Adenine

2. 45% Adenine

Secret of Photo 51

Initial Thoughts & Questions• What is the climate like for women in

the 1940s?• Historical Treatment of Minorities

Discovery of DNA’s Structure

• Secret of Photo 51 Video