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Biology Review Photosyntesis
Terms in this set (20)
What is photosynthesis?
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
What is the Photosynthesis Formula and what does it mean?
6 CO2(carbon dioxide) + 6 H2O(water) ---> C6H12O6(glucose) + 6 O2(oxygen)
Plants take in carbon dioxide and water and converts it into glucose which eventually becomes oxygen
What is the ultimate energy source for photosynthesis?
What is the first law of thermodynamics?
The First Law of Thermodynamics states that heat energy cannot be created or destroyed. It can, however, be transferred from one location to another and converted to and from other forms of energy.
How does the first law of thermodynamics apply to photosynthesis?
In photosynthesis, the plant does not make energy but just transforms light energy into food energy.
Why does the color of light have an effect on photosynthesis?
Plants respond differently to different colors of light, because chlorophyll reflects green light and absorbs blue and red (therefore, blue and red are useful for photosynthesis, but green isn't).
What are the two stages of photosynthesis?
Light reaction and Dark reaction(Calvin cycle)
What happens during light reaction?
-Uses sunlight energy
• Occurs in thylakoid
• Splits water and releases
• Produces ATP and NADPH
Describe electron transport and its role in photosynthesis.
Electron transport is the bumping together of electrons. This bonds the hydrogen and transfers energy to promote photosynthesis.
Describe how the formation of ATP takes place during the light reaction. Be sure to include all the details.
ATP SYNTHASE~ formed by the positive charge of the interior reacting to the negative charge of the exterior.
Po3~ part of the stroma
ADP~ formed from excess ATP in previous cycles
These 3 things combined form ATP
What is the chemiosmotic production of ATP in photosynthesis called?
What are the end products of the light reaction?
ATP and NADPH
List the storage molecules of the light reaction.
What happens during the Calvin cycle?
• Uses sunlight energy
• Occurs in Stroma
• Uses CO2, ATP, NADPH
• Produces Glucose
During the dark reaction, why does the formation of glucose happen 1 out of 6 cycles?
This is because there are missing enzymes that should've been formed during the light reaction.
Water breaks down into 3 parts what are they and how do these parts help in the formation of the glucose molecule?
-2p(pair of electrons)
12 H+ and 6O2 are put together with 6O2 in the formula to complete photosynthesis.
Describe the various parts and what occurs in the areas covered in class about the CHLOROPLAST.
A grana is a stack of thylakoid discs. This is where the light reactions occur. ATP and NADPH are produced from the grana.
Stroma is the space below the grana. This is where the dark reactions of the Calvin Cycle occur, producing glucose.
In soluble starch molecules store the carbohydrate molecules formed from photosynthesis. They keep sugar from building up with the cell.
Draw and describe the structure of the typical leaf.
The drawing is in your notes.
-Xylem... water movement
-Phloem... sugar movement
-Stoma... air exchange
Guard cells... close the stoma
Palisade layer... Thick the capture sun rays
Sponge layer... allows for exchange
Waxy epidermis... keeps water in
Explain what the term vascular means?
of, relating to, affecting, or consisting of a vessel or vessels, especially those that carry blood.
Be able to fill in the chart of photosynthesis.
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