Lab #7 Flashcards
Photosynthesis
• The process whereby green plants (autotrophs) capture the energy of sunlight, and using the electrings from water, produce energy-containing compounds which are used to fix CO2 to produce glucose
- energy capturing reaction
- all life on earth is dependent of this
- glucose produced by photosynthesis is burned during respiration to release the store energy and produce ATP, which is used to drive all energy-requiring processes
The photosynthetic processes occurs in two stages:
- Light reactions
2. Dark reactions
Light reactions
- known as “light reaction” because light is required to drive them
- water is split and the energy rich compounds ATP and NADPH2 are then used in the dark reactions
Dark Reactions
Once water is split (Light reaction) the energy rich compounds ATP and NADPH2 are then used in the dark reactions (AKA Calvin Cycle) to drive the energy requiring process if CO2 fixation
- processes in which CO2 is actually fixed
Pigments involved in photosynthesis
- Carotenes
- Xanthophylls (AKA carotenoid)
- Chlorophylls
Stroma
- Ground substance present in chloroplasts
- site of the dark reactions in photosynthesis
Thylakoids
Sac-like membraneous structures in chloroplasts, chlorophylls, and carotenoid pigments are found within the thylakoid membranes
Granum
- Stack of thylakoids
- site of the light reactions of photosynthesis
Intergrana Lamellae
Membranes connecting grana
Chlorophyll A
Blue green in color
Chlorophyll B
Yellow green in color
Spectroscope
• instruments that seperates or splits white light into its component parts (colors).
-The colors appear as a band, called the spectrum, ranging from red to violet
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Chemical reactions shown in lab
