Question 1

Halobacterium has a photosynthetic membrane that is coloured purple. Its photosynthetic action spectrum is exactly complementary (opposite to) the action spectrum for green plants. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?

Accepted Answer

A)  red and yellow
B)  blue, green, and red
C)  green and yellow
D)  red and green
E)  blue and redF) All of the above
G) A) and B)

Question 2

The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during

Accepted Answer

A)  photosynthesis.
B)  respiration.
C)  both photosynthesis and respiration.
D)  neither photosynthesis nor respiration.
E)  photorespiration.F) B) and E)
G) A) and C)

Question 3

Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

Accepted Answer

A)  the splitting of water
B)  the absorption of light energy by chlorophyll
C)  the flow of electrons from photosystem II to photosystem I
D)  the synthesis of ATP
E)  the reduction of NADP⁺F) B) and D)
G) A) and E)

Question 4

Where does the Calvin cycle take place?

Accepted Answer

A)  stroma of the chloroplast
B)  thylakoid membrane
C)  cytoplasm surrounding the chloroplast
D)  interior of the thylakoid (thylakoid space) 
E)  outer membrane of the chloroplastF) A) and B)
G) B) and D)

Question 5

P680⁺ is said to be the strongest biological oxidizing agent. Why?

Accepted Answer

A)  It is the receptor for the most excited electron in either photosystem.
B)  It is the molecule that transfers electrons to plastoquinone (Pq) of the electron transfer system.
C)  It transfers its electrons to reduce NADP⁺ to NADPH.
D)  This molecule has a stronger attraction for electrons than oxygen, to obtain electrons from water.
E)  It has a positive charge.F) A) and B)
G) A) and C)

Question 6

What is the relationship between wavelength of light and the quantity of energy per photon?

Accepted Answer

A)  They have a direct, linear relationship.
B)  They are inversely related.
C)  They are logarithmically related.
D)  They are separate phenomena.
E)  They are only related in certain parts of the spectrum.F) A) and B)
G) C) and E)

Question 7

In the thylakoid membranes, what is the main role of the antenna pigment molecules?

Accepted Answer

A)  split water and release oxygen to the reaction-centre chlorophyll
B)  harvest photons and transfer light energy to the reaction-centre chlorophyll
C)  synthesize ATP from ADP and  ᵢ
D)  transfer electrons to ferredoxin and then NADPH
E)  concentrate photons within the stromaF) A) and E)
G) D) and E)

Question 8

Use the following information to answer the questions below.
You have learned about research conducted during the 1930s by van Niel, who studied photosynthesis in bacteria, which were observed to not release O₂ even though they fixed CO₂.
-These organisms were confounding because the prevailing hypothesis at that time was that

Accepted Answer

A)  autotrophs released O₂ from the splitting of CO₂ to make sugars.
B)  autotrophs didn't use CO₂.
C)  CO₂ was released and oxygen used up during photosynthesis.
D)  only heterotrophs released O₂ while fixing carbon.
E)  the process of photosynthesis was unknown at this time.F) B) and D)
G) A) and E)

Question 9

What is the primary function of the Calvin cycle?

Accepted Answer

A)  use ATP to release carbon dioxide
B)  use NADPH to release carbon dioxide
C)  split water and release oxygen
D)  transport RuBP out of the chloroplast
E)  synthesize simple sugars from carbon dioxideF) A) and E)
G) C) and D)

Question 10

Use the following information to answer the questions below.
You have learned about research conducted during the 1930s by van Niel, who studied photosynthesis in bacteria, which were observed to not release O₂ even though they fixed CO₂.
-From his experiments, van Niel concluded that

Accepted Answer

A)  he must have done something wrong.
B)  something else was being used to provide hydrogen.
C)  CO₂ was not being split to produce O₂.
D)  CO₂ was directly involved in O₂ production.
E)  H₂O was being used to provide hydrogen.F) A) and C)
G) C) and D)

Question 11

Use the following information to answer the questions below.
A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide.
-Since the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed. What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?

Accepted Answer

A)  full-spectrum white light
B)  green light
C)  a mixture of blue and red light
D)  yellow light
E)  UV lightF) A) and C)
G) B) and D)

Question 12

Which of the following are directly associated with photosystem I?

Accepted Answer

A)  harvesting of light energy by ATP
B)  receiving electrons from the thylakoid membrane electron transport chain
C)  generation of molecular oxygen
D)  extraction of hydrogen electrons from the splitting of water
E)  passing electrons to the thylakoid membrane electron transport chainF) C) and D)
G) A) and C)

Question 13

How is photosynthesis similar in C₄ plants and CAM plants?

Accepted Answer

A)  In both cases, only photosystem I is used.
B)  Both types of plants make sugar without the Calvin cycle.
C)  In both cases, rubisco is not used to fix carbon initially.
D)  Both types of plants make most of their sugar in the dark.
E)  In both cases, thylakoids are not involved in photosynthesis.F) All of the above
G) C) and D)

Question 14

What are the products of linear photophosphorylation?

Accepted Answer

A)  heat and fluorescence
B)  ATP and P700
C)  ATP and NADPH
D)  ADP and NADP
E)  P700 and P680F) A) and B)
G) C) and E)

Question 15

Generation of proton gradients across membranes occurs during

Accepted Answer

A)  photosynthesis.
B)  respiration.
C)  both photosynthesis and respiration.
D)  neither photosynthesis nor respiration.
E)  photorespiration.F) A) and B)
G) None of the above

Question 16

Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?

Accepted Answer

A)  The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP,  ᵢ, and NADP⁺ to the light reactions.
B)  The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions.
C)  The light reactions supply the Calvin cycle with CO₂ to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP.
D)  The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provides the light reactions with water to split.
E)  There is no relationship between the light reactions and the Calvin cycle.F) All of the above
G) None of the above

Question 17

In the process of carbon fixation, RuBP attaches a CO₂ to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P) , what more needs to happen to complete the Calvin cycle?

Accepted Answer

A)  addition of a pair of electrons from NADPH
B)  inactivation of RuBP carboxylase enzyme
C)  regeneration of ATP from ADP
D)  regeneration of RuBP
E)  regeneration of NADP⁺F) None of the above
G) A) and D)

Question 18

Which of the events listed below occurs in the light reactions of photosynthesis?

Accepted Answer

A)  NADP is produced.
B)  NADPH is reduced to NADP⁺.
C)  Carbon dioxide is incorporated into PGA.
D)  ATP is phosphorylated to yield ADP.
E)  Light is absorbed and funnelled to reaction-centre chlorophyll a.F) B) and E)
G) All of the above

Question 19

In a plant leaf, the reactions that produce NADH occur in

Accepted Answer

A)  the light reactions alone.
B)  the Calvin cycle alone.
C)  both the light reactions and the Calvin cycle.
D)  neither the light reactions nor the Calvin cycle.
E)  the chloroplast, but are not part of photosynthesis.F) C) and D)
G) D) and E)

Question 20

Photorespiration lowers the efficiency of photosynthesis by

Accepted Answer

A)  carbon dioxide molecules.
B)  3-phosphoglycerate molecules.
C)  ATP molecules.
D)  ribulose bisphosphate molecules.
E)  RuBP carboxylase molecules.F) A) and E)
G) None of the above

Exam 10: Photosynthesis

Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

Correct Answer
verified

The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during

Correct Answer
verified

What is the primary function of the Calvin cycle?

Correct Answer
verified

How is photosynthesis similar in C₄ plants and CAM plants?

Correct Answer
verified

Which of the following are directly associated with photosystem I?

Correct Answer
verified

Halobacterium has a photosynthetic membrane that is coloured purple. Its photosynthetic action spectrum is exactly complementary (opposite to) the action spectrum for green plants. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?

Correct Answer
verified

Where does the Calvin cycle take place?

Correct Answer
verified

In the thylakoid membranes, what is the main role of the antenna pigment molecules?

Correct Answer
verified

P680⁺ is said to be the strongest biological oxidizing agent. Why?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the relationship between wavelength of light and the quantity of energy per photon?

Correct Answer
verified

In a plant leaf, the reactions that produce NADH occur in

Correct Answer
verified

What are the products of linear photophosphorylation?

Correct Answer
verified

Use the following information to answer the questions below. You have learned about research conducted during the 1930s by van Niel, who studied photosynthesis in bacteria, which were observed to not release O₂ even though they fixed CO₂. -From his experiments, van Niel concluded that

Correct Answer
verified

Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?

Correct Answer
verified

In the process of carbon fixation, RuBP attaches a CO₂ to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P) , what more needs to happen to complete the Calvin cycle?

Correct Answer
verified

Which of the events listed below occurs in the light reactions of photosynthesis?

Correct Answer
verified

Photorespiration lowers the efficiency of photosynthesis by

Correct Answer
verified

Generation of proton gradients across membranes occurs during

Correct Answer
verified

Exam 10: Photosynthesis

Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

Correct AnswerverifiedShow Answer

The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during

Correct AnswerverifiedShow Answer

What is the primary function of the Calvin cycle?

Correct AnswerverifiedShow Answer

How is photosynthesis similar in C₄ plants and CAM plants?

Correct AnswerverifiedShow Answer

Which of the following are directly associated with photosystem I?

Correct AnswerverifiedShow Answer

Halobacterium has a photosynthetic membrane that is coloured purple. Its photosynthetic action spectrum is exactly complementary (opposite to) the action spectrum for green plants. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?

Correct AnswerverifiedShow Answer

Where does the Calvin cycle take place?

Correct AnswerverifiedShow Answer

In the thylakoid membranes, what is the main role of the antenna pigment molecules?

Correct AnswerverifiedShow Answer

P680⁺ is said to be the strongest biological oxidizing agent. Why?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the relationship between wavelength of light and the quantity of energy per photon?

Correct AnswerverifiedShow Answer

In a plant leaf, the reactions that produce NADH occur in

Correct AnswerverifiedShow Answer

What are the products of linear photophosphorylation?

Correct AnswerverifiedShow Answer

Use the following information to answer the questions below. You have learned about research conducted during the 1930s by van Niel, who studied photosynthesis in bacteria, which were observed to not release O₂ even though they fixed CO₂. -From his experiments, van Niel concluded that

Correct AnswerverifiedShow Answer

Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?

Correct AnswerverifiedShow Answer

In the process of carbon fixation, RuBP attaches a CO₂ to produce a six-carbon molecule, which is then split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P) , what more needs to happen to complete the Calvin cycle?

Correct AnswerverifiedShow Answer

Which of the events listed below occurs in the light reactions of photosynthesis?

Correct AnswerverifiedShow Answer

Photorespiration lowers the efficiency of photosynthesis by

Correct AnswerverifiedShow Answer

Generation of proton gradients across membranes occurs during

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified