Overview 1
Name the two phases of photosynthesis.
The light dependent reaction and light independent reaction
Water is required for photosynthesis. In which reaction is water used?
Light dependent reaction
What is the purpose of the light dependent reaction?
To produce the ATP and NADPH that is needed for the Calvin Cycle
Carbon dioxide and glucose
what are three factors that affect the rate of photosynthesis?
availability of water
light intensity
temperature
where does light dependent reaction take place?
within the thylakoids
Carbon dioxide is required for photosynthesis. In which reaction is carbon dioxide used?
light independent reaction
NADPH
where does the Calvin Cycle take place?
the stroma
What is lost when ATP is converted to ADP?
1 phosphate
where does the light independent reaction take place?
in the stroma of chloroplast
what waste product is produced during the light dependent reaction?
oxygen
What is the first step in the light dependent reaction?
pigments in photosystem II absorb light
The unstable 6-carbon compound breaks apart to form two molecules of _________.
PGA
Where does the water and carbon dioxide come from for the plant to use in photosynthesis? (specifics)
Water comes from the roots
Carbon Dioxide comes from the atmosphere
Chlorophyll molecules in photosystem I and II absorb energy from the sun. What happens to the electrons of these chlorophyll molecules?
The electrons gain energy and become excited.
They boost to a higher energy level.
the purpose of the light independent reaction is to produce___________?
glucose
As the electrons pass down through the electron transport chain, protein molecules use the energy to produce.....?
ATP
With the help of the two products from the light dependent reactions ATP and NADPH, PGA is converted into molecules of _______?
PGAL
Explain why we see plants as green. (Details)
Pigments absorb light of different wavelengths and others are reflected. the reflected ones are the ones we see.
What is the name of the molecule that carries high energy electrons from the light dependent reactions to the light independent reactions?
NADP+
what two molecules are constantly cycled/recycled between the light dependent/independent reactions?
ADP and ATP
NADP+ and NADPH
How does photosystem II chlorophyll molecules replace the electrons that were lost to the electron transport chain?
by splitting water (into two electrons, 2H+ and 1 oxygen)
2. allow the Calvin Cycle to start again
Explain how stoma and guard cells work together.
stoma are the small openings found on the leaf surface that allow CO2 to enter and O2 to leave. Guard cells regulate opening and closing of the stoma