Thursday, November 7th: - PowerPoint PPT Presentation

Loading...

PPT – Thursday, November 7th: PowerPoint presentation | free to download - id: 80cbfb-ZDk2M



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Thursday, November 7th:

Description:

Title: Cellular Respiration Harvesting Chemical Energy Last modified by: jtalley Document presentation format: On-screen Show (4:3) Company: Kim Foglia – PowerPoint PPT presentation

Number of Views:14
Avg rating:3.0/5.0
Slides: 16
Provided by: weeblyCom
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Thursday, November 7th:


1
Thursday, November 7th
  • Today you will begin a WebQuest aimed to
    introduce you to
  • cellular respiration. Please pick up the Cellular
  • Respiration WebQuest sheet upfront, as well as
    the
  • Chapter 9 Reading Guide and Unit 3 Homework.
  • Grab your computer from the cart. If you can not
    remember
  • your number, see Talley. Please go to my Weebly
    site to
  • access the worksheet. You can directly access the
    links here

Talleysbiobin.weebly.com
2
Thursday, November 7th
  • Today I will
  • Describe the chemical structure of ATP.
  • List the stages of cellular respiration and
    provide the products of each stage.
  • Differentiate between aerobic and anaerobic
    respiration.

ATP
3
Cellular Respiration Harvesting Chemical Energy
Monday, Nov. 11th
  • Today I will
  • Describe the chemical structure of ATP.
  • List the stages of cellular respiration and
    provide the products of each stage.
  • Differentiate between aerobic and anaerobic
    respiration.

4
The Point is to Make ATP!
Whats the point?
ATP
5
(No Transcript)
6
Harvesting stored energy
  • Energy is stored in organic molecules
  • heterotrophs eat food
  • digest organic molecules
  • serve as raw materials for building fuels for
    energy
  • controlled release of energy
  • series of step-by-step enzyme-controlled
    reactions
  • burning fuels
  • carbohydrates, lipids, proteins, nucleic acids

7
Harvesting energy stored in glucose
  • Glucose is the model
  • catabolism of glucose to produce ATP

respiration
respiration making ATP ( less heat) by burning
fuels in many small steps
glucose
CO2 H2O heat
CO2 H2O ATP ( heat)
8
How do we harvest energy from fuels?
  • Digest large molecules into smaller ones
  • break bonds move electrons from one molecule to
    another
  • as electrons move they carry energy with them
  • that energy is stored in another bond, released
    as heat, or harvested to make ATP

loses e-
gains e-
oxidized
reduced


e-
redox
9
How do we move electrons in biology?
  • Moving electrons
  • in living systems, electrons do not move alone
  • electrons move as part of H atom

10
Coupling oxidation reduction
  • Redox reactions in respiration
  • release energy as break down molecules
  • break C-C bonds
  • strip off electrons from C-H bonds by removing H
    atoms
  • C6H12O6 ? CO2 the fuel has been oxidized
  • electrons attracted to more electronegative atoms
  • in biology, the most electronegative atom?
  • O2 ? H2O oxygen has been reduced
  • release energy to synthesize ATP

? O2
11
Oxidation reduction
  • Oxidation
  • adding O
  • removing H
  • loss of electrons
  • releases energy
  • exergonic
  • Reduction
  • removing O
  • adding H
  • gain of electrons
  • stores energy
  • endergonic

12
Moving electrons in respiration
  • Electron carriers move electrons by shuttling H
    atoms around
  • NAD ? NADH (reduced)
  • FAD2 ? FADH2 (reduced)

reducing power!
NAD nicotinamide Vitamin B3 niacin
carries electrons as a reduced molecule
13
Overview of cellular respiration
  • 4 metabolic stages
  • Anaerobic respiration
  • 1. Glycolysis
  • respiration without O2
  • in cytosol
  • Aerobic respiration
  • respiration using O2
  • in mitochondria
  • 2. Pyruvate oxidation
  • 3. Krebs cycle
  • 4. Electron transport chain

( heat)
14
The Point is to Make ATP!
Whats the point?
ATP
15
And how do we do that?
  • Set up a H gradient
  • Allow the H to flow through ATP synthase
  • ADP Pi ? ATP

ATP
About PowerShow.com