Photosynthesis Flashcards
basic equation for photosynthesis
6CO2 + 12H2O → C6H12O6 + 6H2O + 6O2
process whereby green plants convert the radiant energy of light into chemical energy that is then stored in food molecules
Photosynthesis
photosynthesis to occur must be present
light, a green pigment and carbon dioxide
who are dependent on the products of photosynthesis for their energy, for the raw materials necessary for growth and repair
All living things
Photosynthesis
takes place in chloroplasts
the main product of photosynthesis
Glucose
photosynthesis, follows three different pathways
1) it is converted into other chemical substances required by plant cells (e.g., cellulose in cell walls);
2) it is converted into starch, a storage molecule that can be broken down to glucose again when the plant requires it; and
3) it is broken down during cellular respiration to release energy needed by plants for growth and development.
Light as a Factor in Photosynthesis is measured by
Plectranthus plants experiment
Carbon Dioxide as a Requirement for Photosynthesis
dilute phenol red solution experiment
Separation of Chloroplast Pigments
Paper Chromatography
method of separating closely related compounds, as in the case of pigments, by allowing the mixture of substances to diffuse through an absorbent
Chromatography
absorbent in Chromatography
chromatogram
The different chloroplast pigments can be separated and observed as different color bands on the chromatogram
true
Band Color:
Yellow
Carotene
Band Color:
Yellow-grey
Phaeophytin
Band Color:
Yellow-brown
Xanthophyll
Band Color:
Bright green to blue green
Chlorophyll a
Band Color:
Yellow green to olive green
Chlorophyll b
retention factor equation
RF = (distance of pigment from origin) /
(distance of solvent front from origin)
value is a ratio that can be calculated and compared to known Rf standards to identify unknown compounds
retention factor
_________ of a compound is characteristic of that compound and the solvent used.
rf value
pigment
Absorb violet, blue, and green light
Photoprotective
Carotene
pigment
Transport electrons from PS II
Phaeophytin
pigment
Absorb blue to green light
Xanthophyll
Electron donor and absorbs light with higher wavelengthsa
Chlorophyll a
Main light absorber
Accessory pigment
Chlorophyll b
polar
Anthocyanin (violet)
Carotene rf value
0.95
Phaeophytin rf value
0.83
Xanthophyll rf value
0.71
Chlorophyll a rf value
0.65
Chlorophyll b rf value
0.45
