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Chapter 74: Answers Explained
There are only reflected colors.
The graph shows that red and violet are the most absorbed colors.
The color of the pigment is green.
The only purpose of photophosphorylation is the production of ATP.
Oxygen is not released and no NADPH is produced.
This process is needed when the Calvin cycle is over.
Sugar is only produced during the light-independent reactions.
The Calvin cycle produces PGAL or G3P in the stroma.
Choice B is incorrect because carbon dioxide is a raw material for the Calvin cycle.
Choice D is incorrect because photorespiration doesn't produce sugar.
When rubisco binding with oxygen instead of CO 2 photorespiration occurs.
The Calvin cycle occurs in the stroma.
The Calvin cycle only occurs when there is light, which is why Choice B is incorrect.
The Calvin cycle results in the reduction of CO 2 instead of the oxidation.
The stroma is the site of light-independent reactions.
The light-dependent reactions, including photolysis, are carried out by the grana.
There are no relevant reactions in D.
This is where the Calvin cycle occurs and where G3P is produced.
The matches in B, C, and D are not correct.
Oxygen is released when cells carry out photosynthesis.
In this experiment, aerobicbacteria organize themselves close to an oxygen source.
The answer is red and violet light.
Choice D has a lot ofbacteria in red and violet light.
Choices A and B do not show the distribution.
Choice C shows a distribution that doesn't make sense.
Choices B, C, and D are related to light-dependent reactions.
Plants take in water when PS II loses electrons.
When PS I loses electrons, they are replaced with electrons from PS II.
Choice A is wrong because photosystem II occurs first.
PS I and PS II only occur in the light.
Both photosystems depend on the chlorophyll a and antenna pigments.
Choice B is incorrect because antenna pigments absorb light.
Choice C isn't correct because NADP shuttles hydrogen from the light-independent reactions to the light- dependent reactions.
Choice D isn't correct because the antenna pigments don't store light.
A lab that was described in this question showed that the green from the spinach contained a mixture of different pigments that separated during the process.
There were no bonds being broken and the separation was physical.
The carotenoids are the least dense so they run the fastest and farthest.
Choice C is incorrect because the sample of spinach is a mixture of four different pigments.
A technique to separate a mixture into its components is called chorography.
The solution and indicator will change from yellow to green and then to blue as the CO 2 in the solution is used.
The red and violet colors of light provide the most energy for photosynthesis.
Green light doesn't provide any energy for photosynthesis.
Sunlight contains all the colors of light, but some do not provide enough energy for plants.
The most efficient way to change the indicator from yellow to blue would be to use a beam of focused red light.
CO 2 is used up when sugar is manufactured.
It is possible to measure the amount of sugar inside a plant cell.
Watching an indicator change color is very easy.
The water becomes acidic when CO 2 is dissolved in it.
Another pH indicator is phenolphthalein.
It becomes strong pink in the presence of a base.
The excited electrons end up in PS I.
The process of photolysis removes electrons from water.
Both processes depend on the fact that protons can only flow across a membrane at the ATP synthase channels.
There would be no ATP produced if a chemical was used to make the cristae membrane permeable to protons.
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