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block

During photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the ______.

Select the correct answer(s).  

(0/0)

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thylakoid membrane

chloroplast outer membrane

stomata

cristae

chloroplast inner membrane

none

How does carbon dioxide enter the leaf?

Select the correct answer(s).  

(0/0)

---

through the chloroplasts

through the stomata

through the vascular system

through the thylakoids

through the roots

none

Of the following, which occurs during the Calvin cycle?

Select the correct answer(s).  

(0/0)

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ATP and NADPH are synthesized.

Light energy is converted to chemical energy.

CO2 is reduced

Excited electrons are conveyed from chlorophyll to an electron acceptor.

Photons are absorbed.

none

Chlorophyll molecules are in which part of the chloroplast?

Select the correct answer(s).  

(0/0)

---

plasma membrane

stomata

thylakoid lumen

thylakoid membranes

stroma

none

A photon of which of these colors would carry the most energy?

Select the correct answer(s).  

(0/0)

---

orange

yellow

green

red

blue

none

Glyceraldehyde-3-phosphate (G3P) is produced in the stroma of chloroplasts. Which of the following statements is most true about this compound?

Select the correct answer(s).  

(0/0)

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It is produced from glucose during glycolysis.

For every three molecules of CO2, six molecules of G3P are formed but only one molecule exits the cycle to be used by the plant cell.

It is a 3-carbon sugar.

For every three molecules of CO2, six molecules of G3P are formed but five molecules must be recycled to regenerate three molecules of RuBP

All of the listed responses are correct.

none

Of the following, which occurs during the Calvin cycle?

Select the correct answer(s).  

(0/0)

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ATP is reduced and NADPH is oxidized.

ATP is oxidized and NADPH is reduced.

ATP is hydrolyzed and NADPH is oxidized.

Noncyclic electron flow produces the materials required for the fixation of carbon from carbon dioxide.

Light energy is converted to chemical energy.

none

In photosynthesis, what is the fate of the oxygen atoms present in CO2? They end up _____.

Select the correct answer(s).  

(0/0)

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in water

as molecular oxygen and in sugar molecules

in sugar molecules and in water

in sugar molecules

as molecular oxygen

none

In photosynthesis, plants use carbon from _____ to make sugar and other organic molecules.

Select the correct answer(s).  

(0/0)

---

carbon dioxide

water

soil

chlorophyll

the sun

none

During photosynthesis in chloroplasts, O2 is produced from _____ via a series of reactions associated with _____.

Select the correct answer(s).  

(0/0)

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CO2 ... photosystem II

H2O ... photosystem II

H2O ... photosystem I

CO2 ... both photosystem I and the Calvin cycle

CO2 ... the Calvin cycle

none

During photosynthesis, an electron transport chain is used to _____.

Select the correct answer(s).  

(0/0)

---

transport electrons from photosystem II to photosystem I

transport excited electrons from P700 to an electron acceptor

transport excited electrons from P700 to an electron acceptor and transport excited electrons from P680 to an electron acceptor

transport excited electrons from P680 to an electron acceptor

transport NADPH from the light reactions to the Calvin cycle

none

Molecular oxygen is produced during _____.

Select the correct answer(s).  

(0/0)

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cyclic electron flow during the light reactions

re-energization of electrons by PSI

glycolysis

the Calvin cycle

noncyclic electron flow during the light reactions

none

In a rosebush, chlorophyll is located in _____.

Select the correct answer(s).  

(0/0)

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chloroplasts, which are in mesophyll cells in the thylakoids of a leaf

chloroplasts, which are in thylakoids in the mesophyll cells of a leaf

thylakoids, which are in chloroplasts in the mesophyll cells of a leaf

thylakoids, which are in mesophyll cells in the chloroplasts of a leaf

mesophyll cells, found within the thylakoids of a leaf's chloroplasts

none

Both mitochondria and chloroplasts _____.

Select the correct answer(s).  

(0/0)

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reduce NAD+, forming NADP

use chemiosmosis to produce ATP

release oxygen as a by-product

obtain electrons from water

are surrounded by a single membrane

none

In the Calvin cycle, CO2 is combined with _____.

Select the correct answer(s).  

(0/0)

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a 5-carbon compound to form a stable 6-carbon compound that can be converted directly to glucose

two 2-carbon compounds to form a 5-carbon compound

a 7-carbon compound to form two 4-carbon compounds

a 2-carbon compound to form a 3-carbon compound

a 5-carbon compound to form an unstable 6-carbon compound, which decomposes into two 3-carbon compounds