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Photosynthesis

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by

Brooke Wilks

on 17 November 2015

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Transcript of Photosynthesis

Photosynthesis
The Chloroplast!
Photosynthesis has 2 stages
Light dependent reactions
Anatomy of a Chloroplast
Inside the Thylakoids is Chlorophyll
Photosynthesis occurs in the chloroplast of plant cells
Equation:
Photosynthesis is...
Overview of Photosynthesis
When Autotrophs (such as plants) use the suns energy to make carbohydrate molecules from water and Carbon Dioxide
6CO + 6H 0
Cholorophyll is a green pigment
Step 1: requires the input of water and sunlight
Step 3: Light energy is absorbed by electrons (e-)
C H O + 6O
2
2
6
12
2
Carbon Dioxide
Water
Glucose
Oxygen
Pigment: Molecules that absorb certain wavelengths of light and reflects others. The wavelength reflected determines what color you see
Chlorophyll absorbs
violet
,
blue
, and
red
and reflects
green
Anthocyanin
Carotenoids
Why are eggplants purple and carrots orange?
Occurs in the grana
Step 2: Water is broken down into 3 pieces
oxygen (O )- is released from the plant as a waste product
Hydrogen ions (H+) and electrons are used in the electron transport chain
When the light hits the electrons it "charges" them up.
Charged electrons go down an electron transport chain
is to
What
is to
Step 4: Energy from the charged electrons are used to make ATP and NADPH
Active transport is used to pump H+ into the thylakoid space.
When they diffuse back through the membrane, ATP is made from ADP.
NADPH is made from NADP+
The ATP and NADPH go on to the Calvin Cycle
plants are complicated.
Light Independent Reactions
The Calvin Cycle
Step 1: Requires ATP and NADPH from the light dependent reactions as well as CO2
Step 3: 6CO2 are required to build one carbohydrate
Step 2: The ATP and NADPH are used for energy in this process and a source of electrons and phosphates
plants are REALLY complicated!!
6
Sunlight energy

In which organelle does photosynthesis occur?

Remember the plant leaves under the microscope?
What color is being reflected? What color is being absorbed?
HOW?
Which carbon-based molecule?
Step 4: The carbohydrate Glucose is made!
Products
Reactants
Light dependent reactions
+

Occurs in the Stroma
Full transcript