Lecture 16: Photosynthesis & the Calvin Cycle
Biochemistry 415 with Trievel at University of Michigan - Ann Arbor
About this deck
By: Kristina Brooks
Textbook:
Biochemistry (Biochemistry (Berg))
Created: 2010-03-07
Size: 29 flashcards
Views: 41
Textbook:
Biochemistry (Biochemistry (Berg))Created: 2010-03-07
Size: 29 flashcards
Views: 41
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What is the reaction that takes place through photosynthesis and the Calvin cycle?
CO2 + H2O --> (CH2O)n + O2
Where does photosynthesis take place?
In chloroplasts
-Thylakoid space and membrane
Where does the Calvin cycle take place?
In chloroplasts
-Stroma
What occurs during photosynthesis?
The energy of light drives the synthesis of NADPH and ATP
What occurs during the Calvin cycle?
NADPH and ATP are utilized to synthesize hexoses from carbon dioxide and water
What in the chloroplasts absorbs light?
Chlorophyll
What is one of the defining features of the chemical structure of chlorophyll?
Magnesium at the center of four nitrogens within carbonyl rings
What wavelengths of light is chlorophyll associated with having high absorption?
Red and blue
What are excited electrons captured by?
Nearby photosystems
What occurs in photosystem II?
Water is oxidized to oxygen
-Electrons are transferred to photosystem I
What are the electron transfers between the two photosystems used for?
Reduction of NADP and generation of the proton gradient
What does the proton gradient drive?
ATP synthase
-Conversion of ADP to ATP
What occurs in photosystem I?
Electrons are used to reduce NADP
What does light energy drive?
-Oxidation of water to oxygen
-Reduction of NADP to NADPH
-Proton gradient to drive ATP synthesis
What is the ubiquinone-analog found during photosynthesis?
Plastiquinone
How do weed killers work?
Decouple reactions similar to oxidative phosphorylation
-Act as an electron trap
Are mammals capable of carrying out the calvin cycle?
No
What is the Calvin cycle?
The synthesis of hexoses from carbon dioxide and water in the "dark reaction" in the stroma of chloroplasts
What is the first stage of the Calvin cycle?
Fixation of CO2 into carbohydrates
What is the carbon dioxide acceptor in the Calvin cycle?
Ribulose 1,5-biphosphate
What is the rate-limiting step of the Calvin cycle?
Step involving rubisco
-Trapping of CO2 into ribulose 1,5-biphosphate by rubisco
What is ribulose 1,5-biphosphate carboxylase/oxygenase more commonly referred to as?
Rubisco
What is the second stage of the Calvin cycle?
CHO synthesis requiring ATP and NADPH
What are the reaction products of the second stage?
Fructose 6-phosphate and glyceraldehyde 3-phosphate
What is fructose 6-phosphate used for?
1. Metabolism
2. Storage as sucrose or starch
What protein makes up ~30% of the total proteins in the leaf of a plant?
Rubisco
What is the link between the second stage of the Calvin cycle and glycolysis?
Products of the Calvin cycle can be fitted into metabolism
What is the third stage of the Calvin cycle?
Regeneration of ribulose 5-phosphate
What is the result of stage three?
A series of rearrangements yielding ribose 5-phosphate
About this deck
By: Kristina Brooks
Textbook: Biochemistry (Biochemistry (Berg))
Created: 2010-03-07
Size: 29 flashcards
Views: 41
Textbook:
Biochemistry (Biochemistry (Berg))Created: 2010-03-07
Size: 29 flashcards
Views: 41
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.
“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis
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