Chapter 8: Light Reactions
What is the primary purpose of the light-dependent reactions?
To convert solar energy into ATP and NADPH.
Where does the Calvin Cycle take place?
The stroma of the chloroplast.
What structure in the leaf allows gas exchange?
Stomata.
What gas is taken in by plants during photosynthesis?
Carbon dioxide
What is the main pigment used in photosynthesis?
Chlorophyll
In which organelle do the light-dependent reactions take place?
The chloroplast.
What enzyme is responsible for fixing carbon dioxide?
RuBisCO.
What layer of the leaf contains the most chloroplasts?
The palisade mesophyll.
What gas is released as a byproduct of photosynthesis?
Oxygen (O2).
What color of light is least effective for photosynthesis?
Green
What molecule is split during photolysis?
H20
What is the primary product of the Calvin Cycle?
G3P (Glyceraldehyde-3-Phosphate).
What vascular tissue transports water from the roots to the leaves?
Xylem.
What simple sugar is produced by photosynthesis?
Glucose
What accessory pigments assist in photosynthesis?
Carotenoids and xanthophylls.
What are the two main products of the light-dependent reactions?
ATP and NADPH.
How many turns of the Calvin Cycle are needed to produce one glucose molecule?
six
What vascular tissue transports sugars throughout the plant?
Phloem
What are the two stages of photosynthesis?
Light-dependent reactions and the Calvin Cycle.
What molecule carries electrons from the light-dependent reactions to the Calvin Cycle?
NADPH.
What pigment absorbs light energy for photosynthesis?
Chlorophyll.
energy molecules that power the Calvin Cycle
What is ATP and NADPH.
What waxy layer prevents water loss from the leaf?
The cuticle
What is the overall equation for photosynthesis?
6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
What is chemiosmosis?
The process of ATP production using a proton gradient and ATP synthase.