1. 30 Seconds 10 Time’s Up! 3 Minutes 1 Minute 4 Minutes 1 2 5 2 Minutes
Bellringer Mon, 01/11
Look up and find out what DNA stands for!
Set up a new Cornell Notes page in your notebook!
Reminders: HW #17 due Fri, LAB FEE anytime,
2 wks left before the end of Semester 1!
30 Seconds 10
Time’s Up!
3 Minutes
1 Minute
4 Minutes 1 2 5
2 Minutes 8 9 7 6 4 3

2. DNA

3. What is DNA? Deoxyribonucleic Acid= DNA
Structure discovered by James Watson and Francis Crick in 1953 with the help of Rosalind Franklin
Found in the nucleus of cell in all living things; like a recipe for that organism!
Coiled as chromosomes, contains sections for hereditary traits (genes) and codes for proteins= all genetic information
Proteins are enzymes- they make all life reactions and functions possible

4. DNA Structure
DOUBLE HELIX, like a twisted zipper, with each side matching the other, running the opposite way (antiparallel)
Structure: phosphorus atom + sugar molecule as a backbone on the outside and base pairs (A, T, G, C) on the inside= nucleotide
Adenine (A) =Thymine (T) Cytosine (C )=Guanine (G)
The base pairs are connected by a weak hydrogen bond.

6. What does DNA do? 1. Replication 2. Transcription 3. Translation
DNA codes for proteins and traits; like a recipe for that organism!
To DNA may undergo 3 processes to make that happen:
1. Replication
2. Transcription
3. Translation

7. What is DNA replication?
Replication= Copying
In Meiosis and Mitosis
3 Step Process:
A. Unzipping of original DNA strand
B. Base pairing of new nucleotides to original strand
C. Matching of new bases to form a new daughter strand
Let’s predict the complementary strand with the following nucleotides:
GGCCTATCGTATC
CCGGATAGCATAG

8. What is Transcription and Translation
How DNA codes for proteins