dna structure and function (notes)
TRANSCRIPT
![Page 1: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/1.jpg)
DNA Structure and Function
Biology IMr. Nettles
![Page 2: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/2.jpg)
Today’s Agenda – Wed. Oct. 9, 2011
Warm-up
Mini-Lesson
Summarization and Homework Questions
![Page 3: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/3.jpg)
A. Enzymes are converted into products by the reactions they catalyze.
B. Enzymes lower the activation energy of reactions.C. One enzyme can catalyze many different reactions.D. An enzyme is used once and then destroyed by the
cell.
Which best describes how enzymes function
in the body?
Cellular Energy
Warm-Up (Nov. 9)
![Page 4: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/4.jpg)
A. move substances across the cell membrane
without the use of ATP.B. move from low concentration to high
concentration by diffusion.C. move small molecules through the cell
membrane by osmosis.D. move substances from a low concentration to
high concentration through the use of energy.
In active transport, carrier proteins
Cellular Energy
Warm-Up (Nov. 9)
![Page 5: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/5.jpg)
A. absorb excess energyB. release unused energyC. increase the reaction rateD. regulate product reactivity
Which best describes the role of enzymes in
a chemical reaction?
Cellular Energy
Warm-Up (Nov. 9)
![Page 6: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/6.jpg)
Today’s Objectives
I will identify the structure of DNA. (How it looks)
I will articulate the function of DNA. (What it does)
I will explore DNA replication. (How it is made)
![Page 7: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/7.jpg)
What is DNA?
DNA is a large molecule that directs the making of proteins in the cell.
The proteins made control all the activities and processes in the cell.
![Page 8: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/8.jpg)
Where is DNA located?
DNA is located in the nucleus of the cell.
![Page 9: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/9.jpg)
How does DNA look?DNA forms a double
helix. It looks like a twisted
braid.
DNA is a nucleic acid, so it’s made up of nucleotides.
![Page 10: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/10.jpg)
How is DNA made?
DNA is made through a process called DNA replication.
DNA copies itself during S phase of the cell cycle.
![Page 11: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/11.jpg)
Steps of DNA Replication
1. The two strands of DNA separate or “unzip”.
1. Each “old strand” creates a “new strand” by base pairing.
1. The enzyme, DNA polymerase, checks for errors and repairs the new DNA molecule
![Page 12: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/12.jpg)
Nucleotides and Base Pairing
Nucleotides are made up of three parts: a five – carbon sugar a phosphate group a nitrogenous base
DNA nucleotides can have one of four different nitrogenous bases: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).
Nitrogenous Base Pairing: A pairs with T (Apples grow on Trees). C pairs with G ( Cars need Gas).
![Page 13: Dna structure and function (notes)](https://reader033.vdocument.in/reader033/viewer/2022052523/555d07dbd8b42a08668b59ce/html5/thumbnails/13.jpg)
Video about Genetic Engineering