1 / 16

Photosynthesis

The process which most living organisms obtain energy. Photosynthesis. 1 . What are the chemical reactants in photosynthesis ? 2 . Write the equation for photosynthesis. 3. What is the function of chlorophyll ? 4 . Describe the difference between the two photosystems .

huyen
Download Presentation

Photosynthesis

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The process which most living organisms obtain energy Photosynthesis

  2. 1. What are the chemical reactants in photosynthesis? 2. Write the equation for photosynthesis.3. What is the function of chlorophyll? 4. Describe the difference between the two photosystems. 5. What are the end products of the light dependent reaction? 6. What are the end products of the light independent reaction? 7. What is ATP and why is it important? 8. Where does photosynthesis occur? 9. Describe what happens in the 3 main stages of photosynthesis. 10. What type of plants are C4 plants? CAM Plants? Questions to answer

  3. Biochemical Pathways • Series of chemical reactions where products are the reactants in the next step • C6H12O6 +6O2→  6CO2 +  6H2O + Energy

  4. Where?

  5. Autotrophs make their own food from photosynthesis Heterotrophs consume other heterotrophs or autotrophs: ultimately the energy comes from cellular respiration (opposite chemical reaction of photosynthesis) Where does energy come from?

  6. Overview of Photosynthesis

  7. Occur in chloroplasts White light hits, absorbs red light and chlorophyll b soaks up purple, blue and some of the orange light. Green light is reflected so that’s what we see. Chlorophyll a is the main player Chlorophyll b and carotenoids are accessory pigments which allow more light to be used. Light reactions

  8. Photosystems • Next the light energy is converted to chemical energy through Photosystem I and Photosystem II.

  9. NADP: nicotinamide adenine dinucleotide phosphate RuBP: ribulosebiphosphate G3P: glyceraldehyde -3- phosphate GlossARY

  10. Light has enters and excites the electrons, they leave the chlorophyll a to enter the “primary electron acceptor” The primary e- acceptor moves electrons and this loss of energy will push protons into the thylakoid. Photosystem II

  11. the buildup of protons from the thylakoid space (from ETC of PII) gives us potential energy, ATP synthase (enzyme) adds a phosphate group (P) to ADP to make ATP • NADPH and ATP fuel the next part: • The Calvin Cycle chemiosmosis

  12. The Calvin Cycle • Carbon fixation, where a 3-carbon sugar is produced from CO2, occurs in stroma. • See p120

  13. Alternative Paths to carbon fixation • C4 pathway- allow carbon dioxide to be fixed into four carbon sugars • CAM pathway- some plants are dedicated CAM plants and others can shift if environment is unsuitable for other pathways.

  14. Could plants live without animals? Could animals live without plants? Why or Why not? What causes leaves to change different colors in the fall? What are the two stages of photosynthesis? What happens in them and where? Discuss…

More Related