Photosynthesis Flashcards
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Where does carbon Dioxide enter the leaf
Stomata
What part of the chloroplasts contains chlorophyll?
Thylakoid memrane
What captures the sunlight in leaf
Thylakoid memrane
In a leaf where does CO2 combine with H20 to form sugar
Stroma
Where is Stroma found
Inside chloroplasts
Fluid that surronds the stacks of thylakoids?
Stroma
2 parts of photosynthesis
Light Reaction: Where the chlorophyll absorbs sunlight
Calvin Cycle
Where does the Calvin cycle happen
Stroma
Where does light reactions take place?
Thylakoids
Oxidation is the _____ of electrons
Loss
Reduction is the _____ of electrons
Gain
Why do we see plants as green?
Chlorophyll is green because it absorbs all other other colors and reflects green
Carotenoids absorb which colors and relect which
Violet,blue,green
Yellow and oranges
What does the various symbols in this equation mean: 6CO² + 6H²O ( -> Light -> ) C ⁶H¹²O⁶ + 6O²
6 carbon dioxide + 6 water and light Make Glucose & 6 Oxygen
Which molecules do light reactions produce?
ATP & NADPH
Where does the light reaction take place?
Thylakoid Membrane
Where is the site if the Kalvin Cycle?
Stroma
Cholophyll A & B reflect which colors?
Greens
Light energy is converted to ____ energy in the ____ stages of photosynthesis.
Chemical/ light
Which of the following are either used or produced by autotrophs during photosynthesis.
Fat, kinetic energy, oxygen, RNA, Co², Water, Solar Energy, Protein, Carbohydrate, ATP,
Oxygen, Co², Water, Solar Energy, Carbohydrate, ATP,
What is the role of plant pigments in photosynthesis
Absorb the light
Label Structures of a leaf MAKE IMAGES
Xxxx
Inputs from the light reactions are:
Solar Energy, Water, ADP+P, NADP+
Outputs from the light reactions:
Oxygen, ATP, NADPH
Inputs from the Calvin Cycle:
Co2, ATP, NADPH
Output from the Calvin Cycle:
G3P a small sugar not quite Glucose
What is a photo system? What does it consist of?
A phtosystem is a complex that absorbs solar energy via a pigment complex and high energy electrons are generated.
A pigment complex and electron acceptor
Where do photosystems occur?
Thylakoid membrane
In photosystem II electrons are passed from one pigment to another until they are concentrated where?
A pair of chlorophyll a molecules called Reaction Centers
Electrons become so energetic that they leave the reaction center and move where?
Electron Acceptor Molecules
Describe Photosystem II.
Inputs
Outputs
Phtosystem concentrates the light energy into a Reaction Center
Causing release of high energy electrons which is taken in an Electron Acceptor
Passed to Electron Transport Chain
Inputs: Water, Co², Sunlight, ADP + P
Outputs: ATP and Oxygen
Describe Photosystem I
Inputs
Outputs
Sunlight is collected by Photosystems and Electrons are relased
These Electrons are used to Reduce
NADP+ to NADPH
Inputs: Electrons, Light, NADP+ H+
Outputs NADPH
Outputs: ATP and Oxygen
Why doesn’t Photosystem II lose all its Electrons?
Photolysis breaks H2O into available electrons and produces Oxygen as a side affect
What happens to the products of the light cycle? What are they?
Is the light dependant reactions Endergonic or Exergonic?
They are used to give energy for the Calvin Cycle.
ATP and NADPH
Exergonic
Which cycle is NADP+ found in
Light dependant cycle
3 parts of Calvin Cycyle
CO2 fixation
CO2 Reduction
Regeneración of RuBP
Requirements for Calvin Cycyle
ATP, NADPH , CO2
Calvin cycle fixes Carbon to ______
RuBP
Carbon fixed to RuBP prodcues
G3P
_____ is used in Co2 fixation and must be replaced
RuBP
What is produced in the Calvin Cycle
G3P
What fixes Co2
RuBP
Photorespiration is
When the plant produces Co2
How do plants procude Co2
Combine O2 with RuBP
Type of photosynthesis here in Mi
C3
C4 plants instead of using RuBP use
PEP
Where are C4 plants located
Hot dry climates
CAM photosynthesis Stands for:
Crassulacean-acid metabolism
CAM partation Carbon Dioxide fixation by _____
Time
When do CAM plants fix Co2
Night
CAM plants during the day light
Absorb Sunlight & Store ATP & NADPH
C4 plants ideal climate
Hot Dry
CAM plants are best suited to
Extreme Aridity
Initial Co2 acceptor for C3
RuBP
C4 initial Co2 acceptor
PEP
Example of a C3, C4, CAM
Sunflower, Sugarcane, Cacti
Which things use photosynthesis
Plants, algea, some bacteria
Difference between NADH & NADPH
NADH is used in cellular respiración
NADPH is used in photosynthesis
Diagram on 117
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