1 27 Dna Structure

Taking your unit exam results, graph the results of your exam by standard. Identify which standards

you “passed” (80% or higher) and what standards who need to work on (80% or lower)

5/6= 83% 4/6= 66% 3/6= 50% 2/6= 33% 1/6= 16%

8/9= 88% 7/9= 77% 6/9= 66% 5/9= 55% 4/9= 44% 3/9= 33% 2/9= 22% 1/9= 11%

Launch

B1- 75%B2- 68%B3- 65%B5- 76%

Cells

Physiology

Ecology

Genetics

-Genetics is the study of heredity.-Heredity is how different genes/traits

are passed down from parents to children.

Heredity is determined by DNADNA stands for deoxyribonucleic acidFound in the nucleus

Rosalind Franklin took an X-Ray of DNA and helped initially determine its

structure.

DNA is a double helix in which strands are complementary

Watson and Crick

are responsible

for publishing the results that DNA is

a double helix

structure

Sugar Phosphate Nitrogenous Bases

The sugar and phosphate form the backbone of the DNA.

Sugar Phosphate backbone

Nitrogenous Bases

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

Adenine (A) always pairs with Thymine (T) with two hydrogen bonds

Cytosine (C) always pairs with Guanine (G) with three hydrogen bonds