Unit 6: Photosynthesis + Calvin Cycle

Photosynthesis (2parts)

light reactions (energy) + Calvin cycle = glucose

• all occurs in chloroplasts

light reaction inputs + ouputs

H2O, CO2, (sunlight) → O2

{ADP NADP+} → {ATP, NADPH}

calvin cycle inputs

CO2, NADPH, ATP

calvin cycle outputs

glucose, ADP, NADP+

stoma

opening for gas exchange (let in CO2, let out O2)

• close to keep H2O in

• on bottom to prevent evaporation

central vein

draws water up leaves via cohesion and adhesion

• transport glucose

xylem

tissue in vascular plants that transports water and dissolved minerals from the roots to the rest of the plant (towards heart)

pholem

tissue that transports sugars and nutrients produced during photosynthesis from the leaves to other parts of the plant (away from heart)

chloroplast function

to do photosynthesis (light → ATP → (Co2) glucose)

chloroplast parts

thylakoid → sac, site of light-dependent reactions

stroma → liquid, site of Calvin Cycle

thylakoid sac function

electron transport chain:

photosystem II: takes in light energy, excites 2 electrons from H2O

proteins help electrons travel → to power…

H+ pump: active transport to pump in H+ ions

• e- leave and bond w H+ & NADP+ = NADPH

ATP synthase: facilitated diffusion H+ channel that spins

• ADP- and phosphate bond = ATP

stroma function

Calvin cycle!

CO2 + ATP and NADPH energy = glucose

uses RuBisco enzyme to help w bonding