Photosynthesis test

Which of the following organisms makes its own food using light energy from the sun?
Which of the following organisms is a heterotroph?
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Autotrophs produce carbohydrates.
What happens during photosynthesis?
Plants gather energy with light-absorbing molecules called
Plants get the energy they need for photosynthesis by absorbing
does not absorb green light.
Most plants appear green because chlorophyll
stack of thylakoids.
A granum is a
The stroma is the region outside the
In the thylakoid membrane.
Where in the chloroplast is chlorophyll found?
Which of the following is NOT a part of an ATP molecule?
The electrons in chlorophyll molecule become energized.
What happens when chlorophyll is struck by sunlight?
Electron carrier.
What is the role of NADP+ in photosynthesis?
They can accept electrons and transfer most of their energy to another molecule.
What makes certain molecules good electron carriers?
High-energy electrons are highly reactive.
Why are electron carriers needed for transporting electrons from one part of the chloroplast to another?
A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably
oxygen and high-energy sugars.
Photosynthesis uses sunlight to convert water and carbon dioxide into
Which of the following is NOT found in the overall reaction for photosynthesis?
In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of
a phosphate group is removed.
Energy is released from ATP when
Within the thylakoid membranes
Where do the light-dependent reactions take place?
ATP, NADPH, and oxygen gas
What are the products of the light-dependent reactions?
ATP and NADPH are used to produce high-energy sugars.
Which of the following is NOT a step in the light-dependent reactions?
H+ ions are released as water splits.
What action contributes to the inside of the thylakoid membrane becoming positively charged during the light-dependent reactions?
In the thylakoid membrane.
Where are photosystems I and II found?
The Calvin cycle produces sugars.
Which of the following activities happens within the stroma?
H2O ® NADP+ ® Calvin cycle.
Which pathway represents the flow of electrons during photosynthesis?
light-independent reactions.
The Calvin cycle is another name for the
The Calvin cycle takes place in the
High-energy sugars.
What is a product of the Calvin cycle?
Used ATP is discarded by the cell as waste.
Which of the following is NOT a true statement about ATP?
It takes place in the stroma.
How does the Calvin cycle differ from the light-dependent reactions?
No sugars will be produced.
If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars?
The rate of photosynthesis increases and then levels off.
If you continue to increase the intensity of light that a plant receives, what happens?
Organisms, such as plants, that make their own food are called
Organisms that cannot make their own food and must obtain energy from external sources are called

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