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Calvin Cycle
Hannah Evans, Kelsey Peckham, Andrea Renegar, and Karen Sloan
What is the Calvin Cycle?
★ The Calvin Cycle is a series of redox reactions that take place in the stroma of chloroplasts in
organisms that do photosynthesis.
★ It is also known as light independent reactions.
★ In stage 1, fixation, the enzyme RuBisCO incorporates carbon
dioxide into an organic molecule, 3-PGA.
★ IN stage 2, reduction, the organic molecule is reduced using electrons supplied by NADPH.
★ In stage 3, regeneration, RuBP, the molecule that starts the cycle, is regenerated so that the cycle can
continue.
★ The Calvin Cycle is a metabolic pathway
that is in the stroma of the chloroplasts.
★ Carbon enters in the form of co2 and
leaves in the form of sugar.
★ The calvin cycle uses atp as energy, and
consumes nadph that reduces power and
will add high energy electrons to make
sugar.
○ NADPH Supplies the electrons
What is the Difference in Plants?
★ In C3 plants, photosynthesis, carbon fixation, and the
Calvin cycle all occur in a single chloroplast.
★ Photosynthesis takes place in chloroplasts of a mesophyll cell
in c4 plants. a 4 carbon acid is given to a sheath cell, and
then the calvin cycle occurs in the chloroplasts of that sheath
cell.
★ In CAM plants, at night photosynthesis and initial carbon
fixation take place, while during the day the Calvin cycle
operates in the same chloroplasts.
Photosynthesis and the Calvin Cycle
★ The Calvin Cycle is one of the many processes
involved in photosynthesis.
★ It occurs inside the chloroplast, mainly the stroma,
which is found only in plants.
★ The Calvin Cycle relies on the production of ATP and
NADPH from other processes of Photosynthesis.
Resources
http://www.bio.umass.edu/biology/conn.river/calvin.html
http://hyperphysics.phy-astr.gsu.edu/hbase/biology/calvin.html
https://www.google.com/search?
q=redox+reactions&espv=2&biw=1365&bih=581&source=lnms&tbm=isch&sa=X&ved=0CAcQ_AUoAmoVChMI4M_puvXnyAIVBDsCh3UDgpl&safe=active&ssui=on#safe=active&tbm=isch&q=light+independent+reaction&imgrc=mWE0bbky49v25M%3A
https://www.boundless.com/biology/textbooks/boundless-biology-textbook/photosynthesis-8/the-light-independent-reactions-ofphotosynthesis-82/the-calvin-cycle-377-11603/