quick quiz
Download
Skip this Video
Download Presentation
Quick Quiz

Loading in 2 Seconds...

play fullscreen
1 / 10

Quick Quiz - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Quick Quiz. What is ATP made from? What is the GCSE photosynthesis equation? What is a grana? Tricky one… Why is chlorophyll green?. Photosynthesis. 3. We can still view photosynthesis as a whole process. .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Quick Quiz' - louie


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
quick quiz
Quick Quiz
  • What is ATP made from?
  • What is the GCSE photosynthesis equation?
  • What is a grana?
  • Tricky one… Why is chlorophyll green?
3 we can still view photosynthesis as a whole process

Photosynthesis

3. We can still view photosynthesis as a whole process.
  • The light dependent reaction (LDR) and the light independent reaction (LIR) link together.
  • The LDR uses water and produces oxygen.
  • The LIR uses carbon dioxide and produces glucose.

carbon dioxide + water  glucose + oxygen

light dependent reaction
Light dependent reaction
  • Describe the main stages in the light dependent reaction
  • Explain how energy produced during the light dependent reaction is harvested in photosynthesis.
  • Relate the chemistry of the light dependent reaction to the GCSE photosynthesis equation.
slide4

Light dependent reaction

Chlorophyll extracted from spinach under blue light.

slide5

Light dependent reaction

  • The chlorophyll fluoresces red because the electrons within it are ‘excited’. When excited they emit energy in the form of red light.
slide6

The light dependent reaction

  • http://www.youtube.com/watch?v=v590JJV96lc
slide8

Key points of the LDR

  • Takes place on the thylakoid membrane.
  • Photosystem II comes before

photosystem I.

slide9

Key points of the LDR

Photosystem II

-Light hits PS II chlorophyll molecule.

-Electrons are excited and pass onto electron carrier.

-Electrons are then passes along the electron transport chain.

-Electron lose energy as they pass to each carrier.

-This energy is used to drive ATP synthesis.

-But PS II has lost electrons. These are given back to PS II by the photolysis of water.

H2O  ½ O2 + H2 + 2 e-

slide10

Key points of the LDR

Photosystem I

-Light hits PS I chlorophyll molecule.

-Electrons are excited and pass onto electron carrier.

-Electrons are then passes along the electron transport chain.

-Electron lose energy as they pass to each carrier.

-This energy is used to drive NADPH production

-But NADPH production also requires H+ ions.

These come from the photolysis of water.

ad