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Photosynthesis
sections 3.8, 8.2
25
Biology
11th Grade
03/14/2012

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Term
Light energy is used to...?
Definition
produce ATP, and split H2O molecules (photolysis) to form H+ and O2
Term
ATP and H (derived from photolysis) are used to...? 
Definition
fix CO2 to make organic molecules
Term
Photosynthesis involves...?
Definition
the conversion of light energy into chemical energy
Term
Light from the sun is composed of...?
Definition
a range of wavelengths (colors)
Term
What is the main photosynthetic pigment?
Definition
chlorophyll
Term
Photosynthesis consists of what two reactions?
Definition
  • light-dependent reaction
  • light-independent reaction
Term
What is photolysis?
Definition
the splitting of H2O molecules into H+ and O2
Term
Where does photosynthesis occur?
Definition
thlakoid space (lumen)
Term
What is the absorption spectrum?
Definition

used to show one pigments absorption

 

[image]

Term
What is the action spectrum?
Definition

used to show all pigment absorption

 

[image]

Term
Name the parts of a chloroplast
Definition
  • grana(um)
  • starch grain(granule)
  • thylakoid
  • thylakoid membrane
  • double membrane
  • outer membrane
  • inner membrane
  • lumen (inner thylakoid space)
  • lamella
  • ribosomes 70s
  • stroma
  • (genetic material - don't have to know)
Term
Which two colors of light does chlorophyll absorb the best?
Definition
red and blue
Term
What are the final products of the light-dependent reaction?
Definition

ATP (product of PSII)

+

NADPH (product of PSI)

Term
What are the 3 main limiting factors to photosynthesis?
Definition
  • temperature
  • CO2 concentration
  • light intensity
Term
What does chemiosmosis allow?
Definition
the phosphorylation of ADP
Term
Where does the light-dependent reaction occur?
Definition
the thylakoid
Term
Where does the light-independent reaction occur?
Definition
stroma
Term
The light-dependent reaction uses light energy to form what?
Definition
ATP and NADPH
Term
The light-independent reaction uses ATP + NADPH to form what?
Definition
trios phosphates
Term
What does the extensive membrane surface area of the thylakoids allow?
Definition
greater absorption of light by photosynthesis
Term
What does the small space within the thylakoids (lumen) allow?
Definition
allows a faster accumulation of p+ to create a concentration gradient
Term
Why is the stroma region of a chloroplast similar to the cytosol of the cell?
Definition
allows an area for the enzymes necessarry for the Calvin Cycle to work
Term
What is the function of a chloroplast's double membrane?
Definition
isolates the working parts and enzymes of the chloroplast from te surrounding cytosol
Term
How can photosynthesis and cellular respiration be measured?
Definition
  • Depletion of substrate
  • Accumulation of products
Term
What is the final e- acceptor?
Definition
O2
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