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

DNA

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

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.

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

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

What is Transcription and Translation How DNA codes for proteins