Tuesday, December 24, 2013

Photosynthesis

Part A

Correct
Oxygen is a by-product of the photosynthetic process.
Part B

Correct
The light-dependent reactions use H2O and produce O2.
Part C

Correct
CO2 is unusable until plants have "fixed" this carbon into sugar.
Part D

Correct
The water molecules are split to replenish electrons in photosystem II, leaving behind protons, which are used to generate a proton gradient for the formation of ATP, and oxygen, which is released as a by-product.
Part E

Correct
The NADPH produced by photosystem I is used to supply energy for the production of sugars during photosynthesis.
Part F

Correct
All organisms use the sugars produced by photosynthesis to generate energy.
Part G

Correct
Light energy drives the formation of ATP and NADPH during the light-dependent reactions; these energy molecules are then used during the light-independent reactions to form sugars.
Part H

Correct
The regeneration of RuBP ensures that the Calvin cycle can proceed indefinitely, since RuBP fixes carbon dioxide into an organic molecule that is used to produce sugar.

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