ART 1001 : Biology 1201 Exam3
10/1-10/5 Photosynthesis 10/1/2012 8:43:00 AM
Where did most of the mass dry weight of this tree come from?
Sun
Air
Soil
Answer: Air
Sun isn’t the answer
Photosynthesis: 6CO2+12H2O+Light → 6O2+C6H12O6+6H2O
• Convert 2 low energy molecules into a high energy molecule
• Actually creates G3P which is an intermediate of glycolysis in
cellular respiration
What is the fate of Oxygen in water?
Glucose
Oxygen
Water
Answer: oxygen
Which of the following best describes the light reaction?
Conversion of CO2 to glucose
Capture Light energy to for chemical energy
Converts light energy to glucose
Answer: Capture light energy to chemical energy
The Calvin cycle (dark reactions) occur in the:
Cytoplasm
Thylakoid
Stroma
Matrix
Space between membranes
Answer: Stroma
What are the inputs to the Calvin cycles?
CO2
ATP
NADH+H+
CO2, ATP, NADH+H+
ATP and NADH+H+
Answer: CO2, ATP, NADPH+
What are the outputs of the Calvin cycles?
G3P
APD
NADP+
G3P and ADP
G3P, ADP, and NADP+
Answer G3P, ADP, and NADP+
We really just did clicker questions today based on what was said in
the pre lecture and the images he showed.
Where do we get the energy for the Calvin Cycle?
• Light reactions
• Cyclic and Non-Cyclic Phosphorylation
Photosystem
Document Summary
Photosynthesis: 6co2+12h2o+light 6o2+c6h12o6+6h2o: convert 2 low energy molecules into a high energy molecule, actually creates g3p which is an intermediate of glycolysis in cellular respiration. The calvin cycle (dark reactions) occur in the: We really just did clicker questions today based on what was said in the pre lecture and the images he showed. Where do we get the energy for the calvin cycle: light reactions, cyclic and non-cyclic phosphorylation. Photosystem: a collection of several hundred pigment molecules in the thylakoid membrane. Photosystem 1 and 2: antenna pigments, ~200 chlorophyll a, ~50 chlorophyll b, ~50 other pigments, reaction center molecules, special versions of chlorophyll a, p700(photosystem 1 reaction center) or. P680(photosystem 2 reaction center: light absorbed, light bounces from pigment molecule to pigment molecule until it gets to the reaction center. Why not have 300 reaction centers: pigments absorb light and reflects color, if they have a large range of pigment there able to absorb more wavelengths of light.