chapt07_lecture - How Cells Harvest Energy Chapter 7...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
How Cells Harvest Energy Chapter 7
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Respiration Organisms can be classified based on how they obtain energy: autotrophs : are able to produce their own organic molecules through photosynthesis heterotrophs : live on organic compounds produced by other organisms All organisms use cellular respiration to extract energy from organic molecules.
Background image of page 2
3 Respiration Cellular respiration is a series of reactions that: -are oxidations – loss of electrons -are also dehydrogenations – lost electrons are accompanied by hydrogen Therefore, what is actually lost is a hydrogen atom (1 electron, 1 proton).
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Respiration During redox reactions, electrons carry energy from one molecule to another. NAD + is an electron carrier. -NAD accepts 2 electrons and 1 proton to become NADH -the reaction is reversible
Background image of page 4
5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6
Background image of page 6
7 Respiration During respiration, electrons are shuttled through electron carriers to a final electron acceptor. aerobic respiration : final electron receptor is oxygen (O 2 ) anaerobic respiration : final electron acceptor is an inorganic molecule (not O 2 ) fermentation : final electron acceptor is an organic molecule
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8
Background image of page 8
9 Respiration Aerobic respiration: C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O G = -686kcal/mol of glucose G can be even higher than this in a cell This large amount of energy must be released in small steps rather than all at once.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Respiration The goal of respiration is to produce ATP. -energy is released from oxidation reaction in the form of electrons -electrons are shuttled by electron carriers (e.g. NAD + ) to an electron transport chain -electron energy is converted to ATP at the electron transport chain
Background image of page 10
11 Oxidation of Glucose Cells are able to make ATP via: 1. substrate-level phosphorylation transferring a phosphate directly to ADP
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/06/2010 for the course BIO 1510 taught by Professor Rodriguez during the Spring '08 term at Wayne State University.

Page1 / 54

chapt07_lecture - How Cells Harvest Energy Chapter 7...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online