6: Energy

Question 1

Photsynthesis

Answer 1

transformation of solar energy of carbs

Question 2

Photosynthetic Light Reaction

Answer 2

• occur in thykaloid membrane
• chlorophyll absorbs solar energy
• water oxidized to release electrons, hydrogen ions, oxygen
• ATP produced from ADP + P
• Enzyme helper accepts electrons & becomes NADPH

Question 3

Calvin Cycle Reaction

Answer 3

• occur in stroma
• CO2 taken up by a molecule in the cycle
• ATP & NADPH from light reactions reduce CO2 to a carb

Question 4

Chlorophylls & Carotenoids

Answer 4

pigments found within photosynthesizing cells

• absorb some visible light
• color that isnt absorbed is what we see

Question 5

Electron transport pathway

Answer 5

• light reactions that store solar energy & produces ATP and NADCP
• using electron transpo chain

Question 6

ATP production during Photosynthesis

Answer 6

• thykaloid space is resevoir for hydrogen ions.
• water split, 2 H+ remain in thykaloid space
• electrons move down electron transpo chain, electrons give up energy
• energy used to pump H+ from stroma in2 thykalid space
• gradient with energy established
• H+ flow down gradient at ATP synthase
• energy released
• ATP enzyme changes shape to create ATP product

Question 7

NADPH production during Photosynthesis

Answer 7

• NADP+ = coenzyme (nonprotein helper)
• becomes NADPH
• during light reactions, NADP+ recieves electrons then pick up a H+ to become NADPH

Question 8

Calvin Cycle: step 1

Answer 8

Carbon dioxide fixation

• co2 attached RuBP carbolayse
• results in 6 carbon molecule
• splits into two 3 carbon molecules

Question 9

Calvin Cycle: step 2

Answer 9

Reduction of CO2

• uses NADPH + ATP from light reactions
• electrons added
• CO2 reduced to a carb

Question 10

Calvin Cycle: step 3

Answer 10

Regeneration of RuBP

• every 3 cycles, 5 G3P molecules used to reform molecules of RuBP

Question 11

How is G3P used?

Answer 11

• glucose made that produces ATP