Exam 4 Ch 6 Flashcards
What is the mail cell type that carries out photosynthesis
Chloroplasts
In what parts of the Chloroplast does photosynthesis take place?
Light Reactions take place in the Thylakoid Membrane
Calvin Cycle takes place in the Stroma
PS2
Oxydizes 2 molecules of water into one molecule of oxygen
Absorbs solar energy
Replacement electrons obtained by splitting water
Releases Oxygen
PS1
Absorption of solar energy
Replacement electrons come from electron transport chain
Electrons and Hydrogen passed to NADP+ to become NADPH
Calvin Cycle
Powered by ATP and NADPH generated by light reaction
Occurs in the Stroma
The End product is Glucose
What Goes in and Comes out of PS1
Solar Energy In
NADPH out
What goes in and comes out of PS2
Solar Energy goes in
Oxygen comes out
What goes in and comes out of the Calvin Cycle
ATP and NADPH in
Glucose out
Steps of Calvin Cycle
Carbon Dioxide Fixation
Carbon Dioxide Reduction
Regeneration of first substance (RuBP)
What supplies the electrons for photosynthesis
Water
Carbon Dioxide Fixation
CO2 from atmosphere attached to RuBP
6 Carbon molecules split to two 3 carbons
CArbon Dioxide Reduction
Uses NADPH and ATP from light reactions
Forms G3P, which can become glucose
Regeneration of First substance (RuBP)
1 G3P can be made into glucose or other
5 G3P used to reform RuBP
Uses ATP from light reactions
C3 Photosynthesis
Mesophyll cells arranged in parallel rows
Calvin Cycle and light reactions occur
Found in Moderate Climates
C4 Photosynthesis
Mesophyll cells arranged in layers around leaf vein
Carry out only calvin cycle in bundle sheath cell
Found in Hot, Dry weather
Stomata can stay closed, preserving water
