Photosynthesis2
-
Upload
barshingert -
Category
Education
-
view
376 -
download
0
Transcript of Photosynthesis2
• Based on what you discovered yesterday, why do leaves change colors in Autumn?
PhotosynthesisPhotosynthesis
What is Photosynthesis?
• Process by which green plants convert the energy from sunlight or light into chemical energy (glucose).
• Obtains the energy from white light.
Autotrophs vs. Heterotrophs
• Autotrophs---producers, makes their own food
• Heterotrophs---consumers, must obtain or eat food
• Autotrophs go through photosynthesis OR ChemosynthesisAutotrophs vs.
Heterotrophs
Photosynthesis/Respiration Cycle
Ingredients of Photosynthesis
• White Light (Sunlight)
• Pigments– Chlorophyll– Accessory Pigments
• ATP
• CO2
• H2O
ATP
ATP = adenosine triphosphate
P
P
Big EnergyBond – Lots Chemical Energy Released
P
Three phosphate Three phosphate groupsgroups
Adenine nitrogen groupAdenine nitrogen group
Ribose sugarRibose sugar
ADP-ATP Cycle
P
White Light
• White Light= ROY G BIV• Colors Appear the way they do because the light is
REFLECTED • WHAT LIGHT IS IMPORTANT IN
PHOTOSYNTHESIS?...
Types of Pigments
•Chlorophyll---Green Chlorophyll---Green (reflected)(reflected)
•Accessory PigmentsAccessory Pigments– Carotenoids:Carotenoids:
•Xanthophyll---YellowXanthophyll---Yellow•Carotene---OrangeCarotene---Orange
Why so many colors?
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
R O Y G B I V
Colors
Absorbancy
Formula for Photosynthesis
H2O + CO2 O2 + C6H12O6
Where Photosynthesis Takes Place
• Leaf• Mesophyll Cells• Organelle responsible for
Photosynthesis– Chloroplast
• Contain Plant Pigments That Capture the Sun’s Energy
• Thylakoid- Light Reactions• Stroma- Dark Reactions
Where the 2 Reactions of Photosynthesis take place
Thylakoids
• This is where the first phase of Photosynthesis takes place.
• Which is also know as the light reaction.
• Involves the trapping of light energy and the formation of materials.
• Produces Oxygen by breaking down H2O into free Electrons, H+ and O
• H+ go to stroma, releasing energy for ATP Production.
Stroma
• This is where the second phase, the Calvin Cycle, of Photosynthesis takes place.
• Which is also known as the dark reaction.
• Produces glucose from H+ and CO2.
• Uses the products from the light reactions to form glucose.
Summary!
• Green Plants Are Excellent At Capturing the Sun’s Energy
• They Make A Huge Amount of Glucose With A Little Of Energy From the Sun
• Hey, They Actually Eat Their Own Glucose Through Aerobic Respiration