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Match the reactants of photosynthesis with the correct sources.

Premises
carbon dioxide
water
energy
Responses
absorption through roots
captured from wavelengths of light
gas exchange through stomata

Correct Answer

carbon dioxide
water
energy

Of the following organisms,which one does not use photosynthesis to convert CO₂ and water into glucose?


A) algae
B) oak trees
C) humans
D) some bacteria
E) a flowering plant

F) D) and E)
G) A) and D)

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If oxygen could be traced,the oxygen in the water in a leaf would end up in carbohydrates after photosynthesis.

A) True
B) False

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Rubisco catalyzes the fixation of CO₂ with ribulose bisphosphate in the first step of the Calvin cycle.

A) True
B) False

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Electrons from water are used to replenish those removed from chlorophyll during the light reactions.

A) True
B) False

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The energy source for photosynthesis is


A) oxygen.
B) sunlight.
C) carbon dioxide.
D) chlorophyll.
E) glucose.

F) B) and E)
G) A) and B)

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Herbicides may kill plants by


A) blocking carotenoid synthesis.
B) blocking electron flow in photosystem II.
C) diverting electrons away from photosystem I.
D) interfering with amino acid synthesis.
E) All of the answer choices are correct.

F) B) and E)
G) C) and E)

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The product of photosystem I is


A) NADPH.
B) ATP.
C) glucose.
D) water.
E) NADH.

F) A) and E)
G) C) and E)

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If you were placing orders for experiments with rubisco,you would need ribulose bisphosphate and what other molecule to conduct the experiments?


A) glucose
B) ATP
C) carbon monoxide
D) organic compounds
E) carbon dioxide

F) D) and E)
G) A) and C)

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Examples of photosynthetic accessory pigments are


A) chlorophyll b and carotenoids.
B) chlorophyll a and carotenoids.
C) chlorophyll a and chlorophyll b.
D) carotenoids and DNA.
E) chlorophyll b and DNA.

F) B) and D)
G) B) and C)

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Electrons excited in photosystem II help the chloroplast produce


A) water.
B) NADPH.
C) glucose.
D) NADH.
E) ATP.

F) All of the above
G) A) and E)

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The Calvin cycle is a 


A) cyclic pathway that produces three-carbon carbohydrates from CO₂.
B) linear pathway that produces three-carbon carbohydrates from CO₂.
C) cyclic pathway that produces ATP and NADPH.
D) linear pathway that produces ATP and NADPH.
E) cyclic pathway that produces ATP and three-carbon carbohydrates from CO₂.

F) All of the above
G) A) and B)

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If you were conducting research on the functioning of a stoma (plural: stomata)to suit your awake-at-night personality,with which plants would you choose to work? A) CAM B) C? C) C? D) CAM or C? E) C? or C?

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Organisms that gain energy by consuming preexisting organic molecules are called


A) heterotrophs.
B) autotrophs.
C) animorphs.
D) plants.
E) None of the answer choices are correct.

F) A) and E)
G) B) and D)

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Reactants in a chemical reaction are the molecules that are assembled together or broken down to form products.The reactants in photosynthesis are 


A) oxygen and glucose.
B) water and carbon dioxide.
C) chlorophyll and oxygen.
D) glucose and water.
E) glucose and oxygen.

F) A) and D)
G) A) and E)

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For many plants to grow well in hot,dry weather,they must be watered so their stomata will remain open for longer periods of time to let in oxygen.

A) True
B) False

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In algae and plants,photosynthesis takes place in the


A) chloroplast.
B) mitochondrion.
C) ribosome.
D) nucleus.
E) lysosome.

F) B) and C)
G) None of the above

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Most biologists agree that the light reactions are less important than the carbon reactions.

A) True
B) False

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The reactions of photosynthesis are summarized as


A) 6CO₂ + 6H₂O C₆H₁₂O₆ + 6O₂.
B) 6CO + 6H₂O C₆H₁₂O₆ + 6H₂O. 
C) 12CO₂ + 6H₂O C₁₂H₁₂O₆ + 6H₂O. 
D) 6CO + 6H₂O C₆H₁₂O₆ + 6O₂. 
E) No answer is correct.

F) B) and C)
G) A) and C)

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