Exam 3 Photosynthesis Basics
Biology 140 with Alexandre-jouline at University of Tennessee - Knoxville
About this deck
By: Theta Jones
Textbook:
Life: The Science of Biology
Created: 2011-04-05
Size: 13 flashcards
Views: 88
Textbook:
Life: The Science of BiologyCreated: 2011-04-05
Size: 13 flashcards
Views: 88
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Photosynthesis
Light-energy is converted to chemical energy
What type of energy is light energy?
Electromagnetic
Photon
discrete unit that contains fixed amount of energy
Purpose of Alternate Pigments (Carotenoids)
Absorb a larger spectrum of light, which is in turn transferred to chlorophyll
Photosystem II
•Light energy oxidizes water → O2, H+, and electrons
•Reaction center is chlorophyll a molecule P680—absorbs at 680nm
•Reaction center is chlorophyll a molecule P680—absorbs at 680nm
Photosystem I
•Light energy reduces NADP+to NADPH + H+
•Reaction center is chlorophyll a molecule P700—absorbs in the 700nm range
•Reaction center is chlorophyll a molecule P700—absorbs in the 700nm range
photophosphorylation
The proton motive force (PMF) drives ATP synthesis by a chemiosmotic process
Two systems of electron transport
Noncyclic electron transport—produces NADPH + H+ and ATP
Cyclic electron transport—produces ATP only
Cyclic electron transport—produces ATP only
Calvin Cycle 3 factors
-Fixation of CO2
-reduction of 3pg(triose sugar/monosacaride) to g3
-regen of RuBP
-reduction of 3pg(triose sugar/monosacaride) to g3
-regen of RuBP
PROBLEM WITH RUBISCO
-oxygenase as well as carboxylase
-Adds oxygen instead of CO2 reducing plant growth
Products: 3pg and phosphoglycerate
Causes a loss of CO2
-Adds oxygen instead of CO2 reducing plant growth
Products: 3pg and phosphoglycerate
Causes a loss of CO2
C3 plants
first product of fixation is 3PG
-pallisades in mesophyll cells have abundance of rubisco
-pallisades in mesophyll cells have abundance of rubisco
C4 plants
first product is oxaloacetate; Mesophyll has PEP carboxylase
-Tropical plants sugar canes corn
-can close stomata but will not respirate because there is no affinity for oxygen
-Tropical plants sugar canes corn
-can close stomata but will not respirate because there is no affinity for oxygen
Amount of Energy retained after photosynthesis
5% stored as Carbs
About this deck
By: Theta Jones
Textbook: Life: The Science of Biology
Created: 2011-04-05
Size: 13 flashcards
Views: 88
Textbook:
Life: The Science of BiologyCreated: 2011-04-05
Size: 13 flashcards
Views: 88
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
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