Requirements
Light Reactions I
Light Reaction II
Calvin Cycle
General Equation
100
____ are molecules that absorb light.
pigments
100
When and where is water split?
During the Light Dependent Reactions in photosystem II
100

What is the name for the enzyme protein that creates ATP?

ATP Synthase

100
The overall purpose of the Calvin cycle is to:
to make sugar
100
What are the products of photosynthesis?
1- oxygen 2- sugar
200
Organisms that make their own energy are called
autotrophs
200

What common process drives H+ ions from inside the lumen to the stroma outside?

diffusion or chemiosmosis

200
NADPH is produced in light-dependent reactions and carries energy in the form of what?
high energy electrons
200

This enzyme is responsible for carbon fixation in the Calvin Cycle.

rubisco

200
The oxygen in our atmosphere comes from _____.
Water (water splitting)
300
What is the main pigment in plants called and where are they located (be specific)?
Chlorophyll Located in photosystem I and II in the thylakoid membrane.
300

What is the main product of photosystem I

NADPH

300
What are the products of the Light-Dependent reactions?
ATP, NADPH and O2
300
The energy to power the Calvin cycle comes from:
Light dependent reactions (light reactions) ATP and NADPH
300

ATP stands for:

adenosine triphosphate

400
When something appears red, it is absorbing all colors except _________.
Red
400

What happens in Photosystem II?

Light from the sun is absorbed by chlorophyll. Electron is excited and begins its travel through e- transport chain; H2O is split into e-, O2, and H+; the e- replenishes chlorophyll

400

Is another water molecule split before the start of photosystem I or are the electrons re-excited from another photon of light?

electrons re-excited from another photon of light

400
What are the three phases of the Calvin Cycle?
1- Fixation 2- Making of sugar (Reduction) 3- Regeneration
400
During which main phase of photosynthesis is CO2 consumed?
During the fixation step of the Calvin Cycle.
500
How is energy released from ATP?
the bond between two P is broken. ADP and P are produced.
500
Where are hydrogen ions pumped into to generate energy to make ATP?
pumped from the thylakoid space into the stroma by ATP Synthase
500

What are the two roles of ATP Synthase?

1- pumps protons (H+ ions) from thylakoid space to stroma. 2- makes ATP from ADP and P

500
How many CO2 molecules are required to produce one sugar molecule (one glucose molecule)?
6
500
Where do ATP and NADPH come from? (Be specific)
in the light dependent reactions: - NADPH is formed in photosystem I (from e- and H+) - ATP is formed by ATP synthase (from ADP and P)
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