Photosynthesis Vs. Cell Respiration worksheet answers, Study notes of Biology

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SBI 4UI

Photosynthesis Vs. Cellular Respiration Review

Complete the following chart to compare these two processes:

Photosynthesis Cellular Respiration

Overall word equation: Carbon dioxide and water

sugar and oxygen

Oxygen and sugar
water and carbon dioxide

Overall chemical equation: 6CO 2 + 6H 2 O + light --> C 6 H 12 O 6 +

6O 2

6O 2 + C 6 H 12 O 6 --> 6CO 2 +6H 2 O +

energy

Reactants: CO 2 and H 2 O and light energy C 6 H 12 O 6 and O 2 and ATP

Products: C 6 H 12 O 6 (or G3P) and O 2 and ATP CO 2 and H 2 O and energy (ATP)

Occurs in which organisms? Occurs in plants, protista (algae),

and some bacteria.

Occurs in all living organisms (plants and animals).

Occurs in which organelle? Chloroplasts Mitochondria

(Glycolysis occurs in cytoplasm)

Inner membrane of organelle: Thylakoid membrane Cristae (with Matrix “filler” inside of

it)

Energy released or required? Requires energy Releases energy

Main function? Production of food. Energy

Capture.

Breakdown of food. Energy release.

Stages: 2 stages: The light dependent

reaction and light independent reaction (calvin cycle).

4 stages: Glycolysis, Pyruvate oxidation, Krebs cycle, Electron Transport Chain (oxidative phosphorylation).

Production of ATP? Yes; goes into calvin cycle to fuel

production of g3p.

Yes; theoretical yield is 38 ATP molecules per glucose but actual yield is only about 30-32.

What powers ATP synthase? H+ gradient across thylakoid

membrane into stroma. High H+ concentration in the thylakoid lumen.

H+ gradient across the inner mitochondria membrane into matrix. High H+ concentration in the intermembrane space

Electron source: Oxidation H2O at PSII Glucose, NADH + , FADH

Final electron acceptor in E.T.C.: NADP+ (forms NADPH ) O2 (Oxygen gas)