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“Getting Energy to Make ATP”

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Presentation on theme: "“Getting Energy to Make ATP”"— Presentation transcript:

1 “Getting Energy to Make ATP”
Cellular Respiration “Getting Energy to Make ATP” Section 9.3 Pg

2 Cellular Respiration Plants and animals get glucose, but how do cells get energy from it Cellular Respiration Definition: the process by which mitochondria break down food molecules to produce ATP Glucose (6C)  ATP’s 2ATP  38 ATP’s (total produced = ???)

3 Cellular Respiration Three stages to cellular respiration Glycolysis
Citric acid cycle Electron transport chain

4 Glycolysis Reaction occurs in the cytoplasm of a cell.
Glucose (6C)  2 pyruvic acid (3C) Reaction does not need oxygen to occur (Anaerobic)

5 Glycolysis Three final products:
NADH (2) ATP (2) Pyruvic acid (2) Two ATP needed for glycolysis and only four are made not efficient process to make ATP.

6 Citric Acid Cycle (or Krebs Cycle)
Reaction takes place in the mitochondria of a cell Takes the pyruvic acid (3C) and makes 2 more ATP & 6 CO2 Also makes many electron acceptors for final stage Electron carrier  electron acceptor NAD-  NADH FAD  FADH2

7 Electron Transport Chain (final stage of cellular respiration)
occurs in the inner membrane of the mitochondria From the citric acid cycle, the electron carriers pass energized electrons along to the electron transport chain NADH and FADH2 pass energized electrons from protein to protein within the membrane, which release small amounts of energy

8 The Electron Transport Chain

9 Electron Transport Chain
ATP Used ATP made Glycolysis Citric Acid Cycle Electron Transport Chain Total ATP Total ATP produced

10 Fermentation Anaerobic process that follows glycolysis when cell are without oxygen for a short period of time. Two major types Lactic acid fermentation Alcoholic fermentation

11 Lactic Acid Fermentation
Definition: series of anaerobic chemical reactions in which pyruvic acid uses NADH to form lactic acid and NAD+, which is then used in glycolysis. You get only 2 ATP for one glucose molecule Lactic acid builds up in your muscles, and that is why your muscles ache when you over exercise.

12 Alcoholic Fermentation
Definition: another type of fermentation that is used by, among others, yeast cells to produce CO2 and ethyl alcohol. Only producing 2 ATP molecules

13 Comparing Fermentation to Cellular Respiration
Lactic Acid Alcoholic Cellular Respiration Glucose Glycolysis (pyruvic Acid) Lactic acid + 2 ATP CO2 Alcohol Water 38 ATP

14 Comparing Photosynthesis and Cellular Respiration
Food CO2 Energy Oxygen Produces … When does it happen? Occurs ?

15 Comparing Photosynthesis and Cellular Respiration
Food accumulated Food broken down CO2 taken in CO2 given off Energy from sun stored in glucose Energy of glucose released Oxygen given off Oxygen taken in Produces glucose from PGAL Produces CO2 and water Goes on only in light Goes on day and night Occurs only in presence of chlorophyll Occurs in all living cells

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