Photosynthesis Flashcards
chlorophyll
- green pigment
- molecule required for photosynthesis
- absorb light energy and converts into chemical energy
chloroplasts
plant cell organelle
redox reaction
- reducing and oxidizing
- 6CO2 + 12 H2O –> C6H12O6 + 6H2O + 6O2
photosynthesis
- Light reactions release oxygen. Products of the light reactions move to the Calvin Cycle.
- Light reaction products and carbon dioxide from the environment interact in the calvin cycle to form monosaccharides, glucose.
light reactions
-light energy excites a chlorophyll molecule housed within a chloroplast. IN: carbon dioxide, water OUT: sugar, oxygen photosystem 2: p680 photosystem 1: p700
Calvin Cycle
Light reaction products and carbon dioxide from the environment interact to form monosaccharides, glucose.
INPUT: ATP, NADPH, CO2
OUTPUT: SUGAR (G3P)
monosaccharides
single sugar molecules
How do plant parts that cannot photosynthesize (produce glucose) receive glucose?
From photosynthetic parts of the plant in the form of sucrose.
Sucrose
disaccharide formed from the joining of glucose + fructose.
starch
- polysaccharides formed with ample supply of glucose and sucrose.
- stored where needed and be later utilized by the plant (example: when photosynthesis is halted)
- Can be transported to other plant cells
When can photosynthesis be halted? What happens when it is halted?
When light or CO2 is unavailable. Plant cells break down the starch into glucose monomers for fuel for cellular reactions.
iodine-potassium iodide
stains starch blue-black
cell wall
The plant cell wall is composed of cellulose. Cellulose is a structural carbohydrate and is considered a complex sugar because it is used in both protection and structure. The plant cell wall consists of three layers. Each layer has its own unique structure and function.
main vein
vein toward the base of each leaf
sodium bicarbonate
baking soda
