Your SlideShare is downloading. ×
  • Like
Dna structure and function (notes)
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Dna structure and function (notes)

  • 1,518 views
Published

 

Published in Education , Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
1,518
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
20
Comments
0
Likes
1

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. DNA Structure and Function Biology I Mr. Nettles
  • 2. Today’s Agenda – Wed. Oct. 9, 2011
    • Warm-up
    • Mini-Lesson
    • Summarization and Homework Questions
  • 3.
    • Enzymes are converted into products by the reactions they catalyze.
    • Enzymes lower the activation energy of reactions.
    • One enzyme can catalyze many different reactions.
    • 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)
  • 4.
    • move substances across the cell membrane without the use of ATP.
    • move from low concentration to high concentration by diffusion.
    • move small molecules through the cell membrane by osmosis.
    • 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)
  • 5.
    • absorb excess energy
    • release unused energy
    • increase the reaction rate
    • regulate product reactivity
    Which best describes the role of enzymes in a chemical reaction? Cellular Energy Warm-Up (Nov. 9)
  • 6. 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)
  • 7. 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.
  • 8. Where is DNA located?
    • DNA is located in the nucleus of the cell.
  • 9. 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 .
  • 10. How is DNA made?
    • DNA is made through a process called DNA replication.
    • DNA copies itself during S phase of the cell cycle .
  • 11. Steps of DNA Replication
    • The two strands of DNA separate or “unzip ”.
    • Each “old strand” creates a “new strand” by base pairing .
    • The enzyme, DNA polymerase , checks for errors and repairs the new DNA molecule
  • 12. 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 ( A pples grow on T rees).
      • C pairs with G ( C ars need G as).
  • 13. Video about Genetic Engineering