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Photosynthesis & Cell Respiration Chapters 8 & 9 Miss Colabelli Biology CPA.

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Presentation on theme: "Photosynthesis & Cell Respiration Chapters 8 & 9 Miss Colabelli Biology CPA."— Presentation transcript:

1 Photosynthesis & Cell Respiration Chapters 8 & 9 Miss Colabelli Biology CPA

2 Obtaining Energy  Autotrophs  Organisms that get their energy from the sun  Use photosynthesis to make ATP  Ex: plants  Heterotrophs  Organisms that get energy from eating foods  Ex: humans

3 Why is photosynthesis important?  Makes organic molecules out of inorganic molecules  Makes glucose (sugar) from sunlight  It begins ALL food chains and webs  Also provides oxygen gas to the atmosphere

4 Photosynthesis = “putting together with light”  Process that uses sunlight to turn water and carbon dioxide into glucose  Plants use glucose as food  Autotrophs make glucose and heterotrophs are consumers of it

5 Overview  Two parts to photosynthesis  Light reactions  Require sunlight to occur  Creates ATP and NADPH (a different form of energy)  Also makes O 2 as a byproduct  Calvin Cycle  Does not require sunlight  When CO 2, ATP, and NADPH make glucose 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2

6 Chloroplasts  Parts of the chloroplast  Thylakoids  Flattened sacs where reactions occur  Granum  A stack of thylakoids  Stroma  Space between the grana

7 Light Reactions  During light reactions, the plant’s _________________absorb the sunlight  First part of _________________  H 2 O + sunlight  O 2  Occurs in the _________________ of the chloroplast

8 Light Reactions  When __________ is split during these reactions, oxygen gas is made as a _________________  The sunlight is used to break down the water and create ______and _________

9 Calvin Cycle  Second part of _________________  CO 2  ______________  Occurs in the _____________ of the chloroplast

10 Rate of Photosynthesis  __________factors that affect the rate of photosynthesis  ____________intensity  _________ ____________ levels  ____________

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12 Cellular Respiration  Process that our cells use to break down food and create ______  Takes place in the ____________  Two Parts to Cellular Respiration (when ______ is present)  ____________  ____________ Respiration  Two parts to ____________(when O 2 is not present)  ____________  ____________(alcoholic or lactic acid) C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O + ATP

13 Glycolysis  Process when glucose is broken down to make ____________ ____________, _______, and ____________  Takes place in the ____________  The pyruvic acid made can either go to _________________ or ____________ respiration  Depends if there is ____________ or not  If there is oxygen present  ____________ respiration  If oxygen is not present  ____________

14 Aerobic Respiration  Occurs only in the presence of ____________  Happens in two stages  ____________ cycle  ____________ ____________ ____________  Occurs in _________________ ____________(cytoplasm in the mitochondria)

15 Krebs Cycle  Named after scientist ______ ______  Process takes pyruvic acid and makes a molecule called ____________ _______ + ________  Also makes some _______, _______, _______  These are the needed _______ for the electron transport chain

16 Electron Transport Chain  Uses products from the _______ _______ to make a lot of _______ for our cells  Occurs in the mitochondrial ______________ called _________  This process requires __________ in order to work

17 Fermentation  Process that occurs if oxygen is _______ present  Pyruvic acid will be fixed to become _______ _______ or ___________ (depends on the organism)

18 Lactic Acid Fermentation  Occurs in our _______ as well as in some _____________ to help make yogurts and cheeses  In our bodies, lactic acid builds up as _______ __________

19 Alcoholic Fermentation  Occurs in organisms such as __________  This process creates ______ and __________ __________  If the CO 2 is released, you make a __________ alcohol (wine)  If CO 2 is not released, you make a __________ or __________ alcohol (champagne)

20 Comparing Photosynthesis & Respiration Photosynthesis Cellular Respiration Function Energy Breakdown LocationChloroplasts Reactants C 6 H 12 O 6 and O 2 Products CO 2 and H 2 O Equation 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O


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