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Cellular Respiration & Photosynthesis

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Marta Mezquita

on 7 May 2014

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Transcript of Cellular Respiration & Photosynthesis

Cellular Respiration & Photosynthesis
The Reactant and Products and Major Events of Photosynthesis
Reactants: 6 Carbon + 6 Water

Products: Glucose + 6 Oxygen Gas

Photosynthesis requires a lot of energy and its gets it energy by chlorophyll absorbing sunlight

Cellular Respiration
The Three Stages of Cellular Respiration
Photosynthesis

In the first four slides you will learn about cellular respiration. You will learn about:
-Cellular Respiration Process
-Fermentation
-Conditions for fermentation vs Cellular Respiration
In the next three slides you will learn about:

-The reactant and products and major events of photosynthesis
-Stomata
-Alternative ways of incorporation carbon into photosynthesis
Stomata
Carbon dioxide enters a leaf, oxygen then exits through tiny pores known as the stomata.
Alternative ways of incorporating carbon into photosynthesis
This is when C2 plants keep their stomata closed most of the time, conserving water when the weather is dry or hot. If a leaf's CO2 concentration is low, you don't need to worry they have an enzyme that will continue to incorporate carbon. The four-compound donates the CO2 to the Calvin cycle to a nearby cell that keeps making sugar.
C4 Pathway
These species are adapted to dry climates. They conserve their water by opening their stomata and admitting CO2 at night. This only happens at night. First the CO2 is incorporated into four-carbon compounds that banks at night then it releases it to the Calvin cycle in the same cell during the day. This process is important because it allows photosynthesis operating during the say when the stomata is closed.
CAM Pathway
C3
Plants that use CO2 directly from the air to drive the Calvin cycle are called C3 plants. The reason that the first organic compound produced in the Calvin cycle is a three-carbon molecule.
Fermentation
Fermentation in Human Muscle Cells
Stage 1: Glycolysis
Input: 6-carbon molecules
Output: 2 pyruvic acid
ATP:2
Stage 2:Citric Acid Cycle
-Fermentation is when you harvest food energy with anaerobic("without oxygen"). This processes relies on glycolysis. During this process cells need to consume more glucose fuel per second because less ATP per glucose is being generated. The cell regenerates NAD+ as the NADH drops its electron cargo down the electron transport chain to 02, although the NAD+ is not recycled because there is no O2. Then NADH disposes electrons when it is added to the pyruvic acid produced by gycolysis. Finally having the pyruvic acid produces the waste product called lactic acid.
Fermentation in Microorganisms
-Lactic acid helps foods like cheese,and sour cream have a sharp or sour flavor. Another example that fermentation happens is in yeast. When yeast ferments it will produce ethyl alcohol as a waste product and CO2 instead other producing lactic acid.
Input: Acetic acid, ADP+P, 3NAD+, FAD
Output: 2CO2, ATP, 3 NADH, FADH2
ATP:2
Stage 3: Electron Transport
Input: NADH, FADH
Output: ATP
ATP: 28
Fermentation vs Cellular Respiration
-They are two different processes for making ATP.

-Fermentation allows you to breath without requiring oxygen. During the glycolysis it produces 2 lactic acid and 2 ATP molecules per glucose.

-Cellular Respiration requires oxygen and during its stage of glycolysis it produces 2 pyruvic acid and generates 32 or so ATP molecules for each glucose.
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