A) play no specific role in photosynthesis. B) transfer energy from chlorophyll to the electron transport chain. C) absorb only red wavelengths of light. D) broaden the range of wavelengths plants can use for photosynthesis. E) transfer electrons to NADP+. A) play no specific role in photosynthesis. B) transfer energy from chlorophyll to the electron transport chain. C) absorb only red wavelengths of light. D) broaden the range of wavelengths plants can use for photosynthesis. E) transfer electrons to NADP+.

A) a pigment found in the stroma of a chloroplast. B) capable of forming chemical bonds using light energy. C) independent of any other molecule. D) raised to an excited state after absorbing light energy. E) able to absorb energy from any incoming electromagnetic wave. A) a pigment found in the stroma of a chloroplast. B) capable of forming chemical bonds using light energy. C) independent of any other molecule. D) raised to an excited state after absorbing light energy. E) able to absorb energy from any incoming electromagnetic wave.

Refer to the Venn diagram below. A student is preparing this diagram as a way to compare CAM plants and C4 plants.Which statement should be placed in the center of the diagram where the two circles overlap?

A) Initial fixation of carbon and Calvin cycle reactions occur at the same time. B) Initial fixation of carbon does not involve rubisco. C) PEP carboxylase is only active at night. D) Malate, the product of initial carbon fixation, is temporarily stored in a vacuole. E) Examples include succulents and cacti. A) Initial fixation of carbon and Calvin cycle reactions occur at the same time. B) Initial fixation of carbon does not involve rubisco. C) PEP carboxylase is only active at night. D) Malate, the product of initial carbon fixation, is temporarily stored in a vacuole. E) Examples include succulents and cacti.

Exam 10: Photosynthesis: Energy From Sunlight

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Rubisco is the most abundant protein on Earth.It has also been claimed to be the most important protein on Earth.Animals do not have this enzyme, and yet their survival depends on it.Why?

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Question 1

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All organisms need to have a source of fixed carbon in order to carry out the anabolic reactions that support cell growth and cell division. Autotrophs are able to fix carbon themselves using photosynthesis, but heterotrophs must rely on autotrophs to fix carbon and provide a supply of it for the heterotrophs to eat. Without autotrophs performing this function, heterotrophs would not survive.

Both the light reactions and the light-independent reactions of photosynthesis

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Refer to the graph and table below. The graph was produced from data obtained by measuring the rate of the reaction catalyzed by the enzyme rubisco under different pH conditions.The data in the table were obtained by measuring the pH inside the thylakoid lumen and in the stroma of a chloroplast under conditions of light and dark.Based on these data, what do you predict will happen to rubisco inside living plant cells when a plant that has been kept in the dark for several hours is moved into a brightly lit room? Explain your reasoning, and also explain the biological mechanism that underlies these observations.

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Rubisco will go from an inactive state in the dark to an active state as the result of pH changes in the stroma where this enzyme is located. Light induces electron transport, which induces the pumping of protons from the stroma into the thylakoid lumen, which results in the increase in pH in the stroma, as shown in the table. This shift in pH is enough to cause significant activation of the enzyme rubisco, as shown by the graph.

Which enzyme catalyzes the first step in the Calvin cycle?

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Question 4

Which substance has not been identified as an electron donor in various organisms that carry out either oxygenic or anoxygenic photosynthesis?

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Question 5

How many moles of CO₂ must enter the Calvin cycle for the synthesis of one mole of hexose to be synthesized?

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Question 6

Accessory pigments

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Question 7

Refer to the figure below. To complete this figure, the chemical formula for the compound _______ needs to be added to the box on the left.

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Question 8

During photophosphorylation, free energy is released

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Question 9

Chlorophyll a is

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Question 10

Carotenoids and phycobilins absorb photons between the red and blue wavelengths and are known as _______ for photosynthesis.

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Question 11

Which statement about photosynthesis is false?

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Question 12

How do red and blue light differ from each other?

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Question 13

Refer to the figure below showing a photosystem embedded in a thylakoid membrane of a chloroplast. Which terms correctly fill the blanks in the following statement: A light-harvesting complex composed of ___ surrounds a central _, where energy absorbed is channeled for its conversion to _____.

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Question 14

What is the general equation of oxygenic photosynthesis?

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Question 15

Plants are green because

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Question 16

Draw a diagram showing how a plant might use the carbohydrates generated by photosynthesis to build the proteins it needs.

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Question 17

The Calvin cycle uses all of the following except _______ to produce glyceraldehyde 3-phosphate (G3P).

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Question 18

Refer to the Venn diagram below. A student is preparing this diagram as a way to compare CAM plants and C₄ plants.Which statement should be placed in the center of the diagram where the two circles overlap?

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Question 19

The chemiosmotic hypothesis states that the energy for the production of ATP during photosynthesis comes from

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Question 20

Showing 1 - 20 of 242

Exam 10: Photosynthesis: Energy From Sunlight

Rubisco is the most abundant protein on Earth.It has also been claimed to be the most important protein on Earth.Animals do not have this enzyme, and yet their survival depends on it.Why?

Both the light reactions and the light-independent reactions of photosynthesis

Which enzyme catalyzes the first step in the Calvin cycle?

Which substance has not been identified as an electron donor in various organisms that carry out either oxygenic or anoxygenic photosynthesis?

How many moles of CO2 must enter the Calvin cycle for the synthesis of one mole of hexose to be synthesized?

Accessory pigments

Refer to the figure below. To complete this figure, the chemical formula for the compound _______ needs to be added to the box on the left.

During photophosphorylation, free energy is released

Chlorophyll a is

Carotenoids and phycobilins absorb photons between the red and blue wavelengths and are known as _______ for photosynthesis.

Which statement about photosynthesis is false?

How do red and blue light differ from each other?

What is the general equation of oxygenic photosynthesis?

Plants are green because

Draw a diagram showing how a plant might use the carbohydrates generated by photosynthesis to build the proteins it needs.

The Calvin cycle uses all of the following except _______ to produce glyceraldehyde 3-phosphate (G3P).

Refer to the Venn diagram below. A student is preparing this diagram as a way to compare CAM plants and C4 plants.Which statement should be placed in the center of the diagram where the two circles overlap?

The chemiosmotic hypothesis states that the energy for the production of ATP during photosynthesis comes from

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How many moles of CO₂ must enter the Calvin cycle for the synthesis of one mole of hexose to be synthesized?

Refer to the Venn diagram below. A student is preparing this diagram as a way to compare CAM plants and C₄ plants.Which statement should be placed in the center of the diagram where the two circles overlap?