If you expose a photosynthesizing plant to water that contains both radioactive H and radioactive O, in which of the products of photosynthesis will the radioactive H and O show up?

H in glucose and water; O in O2

Which of the following statements concerning the role of redox reactions in photosynthesis and cellular respiration is true

In photosynthesis, carbon dioxide is reduced to form sugar, while in respiration, sugar is oxidized to form carbon dioxide

Photosynthesis involves only reductions, while respiration involves only oxidations

Photosynthesis involves only oxidations, while respiration involves only reductions

In photosynthesis, carbon dioxide is oxidized to form sugar, while in respiration, sugar is reduced to form carbon dioxide

Which of the following statements regarding photosynthesis is false?

ATP is not produced during photosynthesis, but only during cellular respiration

Photosynthesis is ultimately powered by light energy and respiration by the chemical energy of fuel molecules

Photosynthesis consumes CO2; respiration consumes O

Photosynthesis produces O2; respiration produces CO2

The light reactions occur in the ________, while the Calvin cycle occurs in the ________.

thylakoid membranes . . . stroma

stroma . . . thylakoid membrane

cytoplasm . . . thylakoid membrane

Which of the following is part of the light reaction?

formation of waste products in the form of O2

occurs when carbon atoms from CO2 are incorporated into an organic molecule.

occurs during the light reactions

provides the cell with a supply of NADPH molecules

Why are most plants green?

Chlorophyll a reflects green light

Chlorophyll a absorbs green light

Chlorophyll b primarily uses green light as the source of energy for photosynthesis.

Green helps plants blend into their environment as a sort of camouflage

passes absorbed energy to chlorophyll a

is best at absorbing the energy of green light

is best at absorbing the energy of blue-violet and red light, just like chlorophyll a

atalyze the incorporation of carbon atoms into RuBP

Which of the following statements about the absorption of photons by pigment molecules is true?

The release of energy by the excited electron can be as heat, light, or fluorescence

It takes several minutes for the pigment electrons to become excited

Photons raise electrons in pigments to the ground state

Excitation of the electrons is a very stable state.

Which of the following is a normal process of photosynthesis that could not occur if all reaction centers were inactivated by a toxin?

donation of excited electrons by chlorophyll a to a primary electron acceptor

donation of excited electrons by chlorophyll b to a primary electron acceptor

absorption of photons by chlorophyll b

absorption of photons by carotenoids

How do the reaction centers of photosystem I and II differ?

Each preferentially absorbs slightly different wavelengths of light

Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II

Photosystem I functions first in the sequence of steps that make up the light reactions

Photosystem II does not transfer electrons from photons

Clusters of light-gathering pigments in a photosystem

pass energy to the reaction center.

are found in the roots of plants

Clusters of light-gathering pigments in a photosystem

pass energy to the reaction center.

are found in the roots of plants

The energy that excites P680 and P700 is supplied by

electrons passing down the electron transport chain

The electron transport chains of the light reaction

shuttle electrons along in a series of redox reaction

provide energy for the citric acid cycle

are found on the plasma membrane of mesophyll cells

The electrons lost from the reaction center of photosystem I are replaced by electrons from

the bottom of the electron transport chain

the top of the electron transport chain

passes electrons to photosystem I

has P700 at its reaction center

does not have a reaction center.

Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that

the final electron acceptor is NADP+ and not oxygen

it involves an electron transport chain

energy is stored in the form of a proton concentration difference

regeneration of ATP is driven by a flow of protons through an ATP synthase

The chloroplast ATP synthase

couples the flow of H+ to the phosphorylation of ADP

helps transport H+ against the concentration gradient

In photosynthesis, the chemiosmotic production of ATP

is analogous to the production of ATP in mitochondria

is a result of the oxidation of glucose

Mitochondria transfer ________ energy from ________ to ATP; chloroplasts transform ________ energy into the chemical energy of ATP

chemical . . . food . . . light

food . . . light . . . chemical

power sugar synthesis during the Calvin cycle

are products of the Calvin cycle.

provide energy to Photosystem I and Photosystem II

are used in the electron transport chain to pump H+ into the thylakoid space.

Chapter 7 photosynthesis

Authored by kelsey backer

Biology

9th - 12th Grade

NGSS covered

Used 6+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Companion

Mesophyll

Sclerenchyma

Tracheid

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NGSS.HS-LS1-5

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Chapter 7 photosynthesis

What is the name given to organisms that can make their own food and thus sustain themselves
without consuming organic molecules derived from other organisms?

Photoautotrophs

Which of the following is an example of a photoautotroph?

Autotrophs that utilize light as their energy source are

What is the likely origin of chloroplasts?

In most green plants, chloroplasts are

________ cells in leaves are specialized for photosynthesis

CO2 enters and O2 escapes from a leaf via

In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the

Chloroplasts contain disklike membranous sacs arranged in stacks calle

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Chapter 7 photosynthesis

What is the name given to organisms that can make their own food and thus sustain themselveswithout consuming organic molecules derived from other organisms?

Photoautotrophs

Which of the following is an example of a photoautotroph?

Autotrophs that utilize light as their energy source are

What is the likely origin of chloroplasts?

In most green plants, chloroplasts are

________ cells in leaves are specialized for photosynthesis

CO2 enters and O2 escapes from a leaf via

In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the

Chloroplasts contain disklike membranous sacs arranged in stacks calle

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology

What is the name given to organisms that can make their own food and thus sustain themselves
without consuming organic molecules derived from other organisms?