Question 1

Which experimental modification would most effectively help to determine the sequence of reactions and reaction intermediates in the Calvin cycle?

Accepted Answer

A) Exposing the cells to 14CO2 for various time intervals 
B) Exposing the cells to alternating periods of light and darkness 
C) Exposing the cells to radiolabeled O2 instead of 14CO2 
D) Varying the amount of water the cells are exposed to 
A) Exposing the cells to 14CO2 for various time intervals 
B) Exposing the cells to alternating periods of light and darkness 
C) Exposing the cells to radiolabeled O2 instead of 14CO2 
D) Varying the amount of water the cells are exposed to

Question 2

The cyclic carbon fixation reactions are also known as the

Accepted Answer

A) Krebs cycle. 
B) Calvin cycle. 
C) citric acid cycle. 
D) tri carboxylic acid cycle. 
A) Krebs cycle. 
B) Calvin cycle. 
C) citric acid cycle. 
D) tri carboxylic acid cycle.

Question 3

If the antenna complex did not exist in a particular plant mesophyll cell, what effect would that have on photosynthesis?

Accepted Answer

A) There would be no expected effect on photosynthesis 
B) These cells would be unable to absorb any light energy 
C) These cells would have a reduced capacity to generate glucose 
D) These cells would be able to fix more carbon dioxide 
A) There would be no expected effect on photosynthesis 
B) These cells would be unable to absorb any light energy 
C) These cells would have a reduced capacity to generate glucose 
D) These cells would be able to fix more carbon dioxide

Question 4

A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I, such that protons are not transported from the stroma into the thylakoid compartment.What is the effect of this chemical on photosynthesis?

Accepted Answer

A) the increased number of protons will be directly used in the thylakoid to produce glucose 
B) an increased proton gradient will provide the energy needed to produce ATP from the light reactions 
C) a decreased proton gradient will cause less ATP to be produced from the light reactions 
D) the increased proton gradient will be used to make NADPH for the Calvin cycle 
A) the increased number of protons will be directly used in the thylakoid to produce glucose 
B) an increased proton gradient will provide the energy needed to produce ATP from the light reactions 
C) a decreased proton gradient will cause less ATP to be produced from the light reactions 
D) the increased proton gradient will be used to make NADPH for the Calvin cycle

Question 5

Flattened sacs of internal membranes associated with photosynthesis are called

Accepted Answer

A) chloroplasts. 
B) photosystems. 
C) the stroma. 
D) thylakoids. 
A) chloroplasts. 
B) photosystems. 
C) the stroma. 
D) thylakoids.

Question 6

Most atmospheric oxygen comes from photosynthesis.From which of the following molecules is the oxygen derived?

Accepted Answer

A) water 
B) carbon dioxide 
C) glucose 
D) chlorophyll a 
A) water 
B) carbon dioxide 
C) glucose 
D) chlorophyll a

Question 7

Light consists of units of energy called

Accepted Answer

A) electrons. 
B) photons. 
C) calories. 
D) neutrons. 
A) electrons. 
B) photons. 
C) calories. 
D) neutrons.

Question 8

The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to

Accepted Answer

A) photosystem I. 
B) photosystem II. 
C) the primary electron acceptor. 
D) the secondary electron center. 
A) photosystem I. 
B) photosystem II. 
C) the primary electron acceptor. 
D) the secondary electron center.

Question 9

If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the

Accepted Answer

A) Stroma 
B) Thylakoid membrane 
C) Between the outer and inner membranes 
D) Inside the thylakoid 
A) Stroma 
B) Thylakoid membrane 
C) Between the outer and inner membranes 
D) Inside the thylakoid

Question 10

A protein that has been transported past the outer chloroplast membrane would have to pass how many more membranes to reach the stroma and thylakoid lumen, respectively?

Accepted Answer

A) 0,1 
B) 1,2 
C) 2,3 
D) 3,4 
A) 0,1 
B) 1,2 
C) 2,3 
D) 3,4

Question 11

A plant researcher wants to construct a synthetic cellulose fiber from 20 glucose molecules.How many molecules of CO2 and glyceraldehyde-3-phosphate are needed to construct the fiber?

Accepted Answer

A) 20, 40 
B) 120, 60 
C) 120, 40 
D) 20, 60 
A) 20, 40 
B) 120, 60 
C) 120, 40 
D) 20, 60

Question 12

Carbon dioxide and water can combine to form glucose, water and oxygen.What is required for that process to occur?

Accepted Answer

A) Nothing, this is a spontaneous reaction 
B) Energy from the process of cellular respiration 
C) Light energy from the sun 
D) Mitochondria This describes the process of photosynthesis, which is an endergonic reaction requiring light energy. 
A) Nothing, this is a spontaneous reaction 
B) Energy from the process of cellular respiration 
C) Light energy from the sun 
D) Mitochondria This describes the process of photosynthesis, which is an endergonic reaction requiring light energy.

Question 13

In which part of the chloroplasts are the Calvin cycle enzymes located?

Accepted Answer

A) stroma 
B) thylakoids 
C) grana 
D) envelope 
A) stroma 
B) thylakoids 
C) grana 
D) envelope

Question 14

What is the color of light that chlorophylls absorb that has the highest energy?

Accepted Answer

A) green 
B) violet-blue 
C) red 
D) yellow-orange Chlorophylls absorb violet-blue, blue, orange-red, and red light.Of these, violet-blue light has the shortest wavelength and thus the highest energy. 
A) green 
B) violet-blue 
C) red 
D) yellow-orange Chlorophylls absorb violet-blue, blue, orange-red, and red light.Of these, violet-blue light has the shortest wavelength and thus the highest energy.

Question 15

Jan Baptista van Helmont did an important experiment related to photosynthesis.He weighed a small willow tree and a pot of soil.Jan then planted the tree in the pot.Over the course of five years, he added only water to the pot.At the end of five years, he weighed the tree and found that it had gained 74.4 kg.He weighed the soil, and it was only 57 g less.What do the results of this specific experiment demonstrate about what is needed for a plant to grow and increase its mass?

Accepted Answer

A) All of the food a plant needs to grow comes from the soil 
B) Plants do not need soil to grow 
C) Plants must be able to increase their mass using substances in addition to what is found in soil 
D) All of the food a plant needs to grow comes from the water 
A) All of the food a plant needs to grow comes from the soil 
B) Plants do not need soil to grow 
C) Plants must be able to increase their mass using substances in addition to what is found in soil 
D) All of the food a plant needs to grow comes from the water

Question 16

What products of light reactions of photosynthesis are used in the Calvin cycle?

Accepted Answer

A) oxygen and protons 
B) carbon dioxide and water 
C) ATP and NADPH 
D) ADP and NADP 
A) oxygen and protons 
B) carbon dioxide and water 
C) ATP and NADPH 
D) ADP and NADP

Question 17

The photosynthetic electron transport causes the accumulation of protons in which part of the chloroplast?

Accepted Answer

A) matrix 
B) stroma 
C) outer membrane 
D) internal thylakoid space 
A) matrix 
B) stroma 
C) outer membrane 
D) internal thylakoid space

Question 18

What color of light is not strongly absorbed by chlorophyll?

Accepted Answer

A) green 
B) violet-blue 
C) red 
D) yellow-orange 
A) green 
B) violet-blue 
C) red 
D) yellow-orange

Question 19

Molecules that absorb light are called

Accepted Answer

A) enzymes. 
B) electron carriers. 
C) pigments. 
D) photosynthesizers. 
A) enzymes. 
B) electron carriers. 
C) pigments. 
D) photosynthesizers.

Question 20

What are the characteristics of red light, which is absorbed by chlorophylls?

Accepted Answer

A) Its photons have the shortest wavelength in the visual spectrum 
B) Its photons have the highest energy in the visual spectrum 
C) Its photons have the longest wavelength in the visual spectrum 
D) It is not considered a part of the visual spectrum Review Figure 8.4 
A) Its photons have the shortest wavelength in the visual spectrum 
B) Its photons have the highest energy in the visual spectrum 
C) Its photons have the longest wavelength in the visual spectrum 
D) It is not considered a part of the visual spectrum Review Figure 8.4

Exam 8: Photosynthesis

Which experimental modification would most effectively help to determine the sequence of reactions and reaction intermediates in the Calvin cycle?

The cyclic carbon fixation reactions are also known as the

If the antenna complex did not exist in a particular plant mesophyll cell, what effect would that have on photosynthesis?

A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I, such that protons are not transported from the stroma into the thylakoid compartment.What is the effect of this chemical on photosynthesis?

Flattened sacs of internal membranes associated with photosynthesis are called

Most atmospheric oxygen comes from photosynthesis.From which of the following molecules is the oxygen derived?

Light consists of units of energy called

The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to

If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the

A protein that has been transported past the outer chloroplast membrane would have to pass how many more membranes to reach the stroma and thylakoid lumen, respectively?

A plant researcher wants to construct a synthetic cellulose fiber from 20 glucose molecules.How many molecules of CO2 and glyceraldehyde-3-phosphate are needed to construct the fiber?

Carbon dioxide and water can combine to form glucose, water and oxygen.What is required for that process to occur?

In which part of the chloroplasts are the Calvin cycle enzymes located?

What is the color of light that chlorophylls absorb that has the highest energy?

What products of light reactions of photosynthesis are used in the Calvin cycle?

The photosynthetic electron transport causes the accumulation of protons in which part of the chloroplast?

What color of light is not strongly absorbed by chlorophyll?

Molecules that absorb light are called

What are the characteristics of red light, which is absorbed by chlorophylls?

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A plant researcher wants to construct a synthetic cellulose fiber from 20 glucose molecules.How many molecules of CO₂ and glyceraldehyde-3-phosphate are needed to construct the fiber?