Question 1

Figuer:
Examine this image, showing an electron transport chain in photosynthesis. 2. D)  is a cyclic reactive pathway that produces three-carbon molecules from CO2." class="answers-bank-image d-inline" rel="preload" >
-The Calvin cycle

Accepted Answer

A)   is a linear pathway that passes high-energy electrons to glucose molecules.
B)   is a cyclic reactive pathway that produces ATP and NADPH to drive other cell processes.
C)   is a linear reactive pathway that produces three-carbon molecules from CO2.
D)   is a cyclic reactive pathway that produces three-carbon molecules from CO2.E) A) and B)
F) None of the above

Question 2

Grana,thylakoids,and chloroplasts are structures in cells that are important to the process of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 3

The rise of photosynthetic organisms increased the concentration of CO2 in the atmosphere.

Accepted Answer

A) True 
 B)False

Question 4

The organelle that carries out photosynthesis in plants is the

Accepted Answer

A)   chlorophyll.
B)   ribosome.
C)   lysosome.
D)   mitochondria.
E)   chloroplast.F) A) and C)
G) None of the above

Question 5

Which of these portions of the electromagnetic spectrum has highest energy?

Accepted Answer

A)   green light, at 510 nm
B)   yellow light, at 590 nm
C)   orange light, at 640 nm
D)   ultraviolet light, at 330 nm
E)   blue-green light, at 450 nmF) A) and B)
G) A) and D)

Question 6

The sea slug Elysia chlorotica absorbs chloroplasts from the alga Vaucheria litorea as it digests the cells.Thousands of structure and transport proteins involved in photosynthesis require thousands of genes in DNA.The algal chloroplast contains only 10% of the genes,while the algal nucleus contains the rest.Chloroplasts function inside the sea slug,allowing it to live on sunlight and carbon dioxide,suggesting that

Accepted Answer

A)   photosynthesis can occur outside of a chloroplast organelle found in algae.
B)   chloroplasts alone are sufficient for photosynthesis, whether in algal cells or sea slug cells.
C)   regions of DNA containing necessary genes for photosynthesis must be present in sea slug cells to retain functioning chloroplasts.
D)   some of the algal cells are not digested and are living symbiotically inside digestive tract of the sea slugs.
E)   algal genes controlling photosynthesis can produce necessary proteins prior to cell digestion, retaining function of the chloroplast.F) A) and E)
G) A) and C)

Question 7

The main byproduct molecule of photosynthesis that is released into the environment is

Accepted Answer

A)   ATP.
B)   oxygen.
C)   chlorophyll.
D)   glucose.
E)   carbon dioxide.F) A) and C)
G) D) and E)

Question 8

What will happen to the pH inside of a thylakoid that is exposed to light?

Accepted Answer

A)   It will not change.
B)   It will increase.
C)   It will decrease.D) None of the above
E) All of the above

Question 9

The reactions of photosynthesis may be summarized as:

Accepted Answer

A)   6CO2 + 6H2O → C6H12O6 + 6O2
B)   6CO + 6H2O → C6H12O6 + 6H2O
C)   12CO2 + 6H2O → C12H12O6 + 6H2O
D)   6CO + 6H2O → C6H12O­6 + 6O2E) A) and B)
F) All of the above

Question 10

Blue light has ___ energy than red light and is ____ by a green leaf.

Accepted Answer

A)   less; reflected
B)   more; absorbed
C)   less; absorbed
D)   more; reflectedE) B) and C)
F) A) and C)

Question 11

The role of water in photosystem I is in contributing electrons,hydrogens,and oxygen.The resulting electrons in photosystem I

Accepted Answer

A)   are used by the Rubisco enzyme to complete carbon fixation with RuBP and CO2.
B)   directly pass through ATP synthase enzymes to activate them in transforming ADP to ATP.
C)   prevent chlorophylls from losing all electrons and breaking apart as they capture light energy.
D)   are added to hydrogens so they can be transported across the thylakoid membranes more easily.E) A) and B)
F) A) and C)

Question 12

The proportion of oxygen in our atmosphere today

Accepted Answer

A)   has increased to 20% since before photosynthesis.
B)   has remained about the same since the first organisms developed.
C)   has decreased to 10%, from higher levels before photosynthesis.
D)   increased rapidly since the development of water-splitting photosynthesis and eukaryotes.
E)   has increased to 20%, including rapid increase since water-splitting photosynthesis and eukaryotes.F) A) and C)
G) A) and E)

Question 13

Most biologists would agree that the most important metabolic pathway of living organisms is photosynthesis.

Accepted Answer

A) True 
 B)False

Question 14

Accessory pigments include molecules that reflect reds,oranges and yellows.Leaves of many plants show these colors in the fall because

Accepted Answer

A)   the cooler weather causes the plant to produce more of the accessory photosynthetic pigments.
B)   the lessening of daylight as winter approaches causes the plant to produce more of the accessory photosynthetic pigments.
C)   plants produce more chlorophyll.
D)   the chlorophyll in the leaves degrades as winter approaches.
E)   All of the answer choices are correct.F) A) and B)
G) A) and C)

Question 15

The reactant (reactants) of photosynthesis is (are)

Accepted Answer

A)   sunlight.
B)   oxygen.
C)   chlorophyll.
D)   water and carbon dioxide.
E)   glucose.F) All of the above
G) A) and B)

Question 16

Discrete packets of kinetic energy in light are called

Accepted Answer

A)   photons.
B)   protons.
C)   lasers.
D)   electrons.
E)   grana.F) A) and E)
G) A) and C)

Question 17

How are algal chloroplasts able to perform photosynthesis in a sea slug?

Accepted Answer

A)   Other animals like puffer fish contain the algal photosystem II gene psbO and perform photosynthesis.
B)   The chloroplast chromosomes were missing the photosystem II gene psbO.
C)   The chloroplasts can function without the photosystem II gene psbO.
D)   The sea slug chromosomes contain the algal photosystem II gene psbO.
E)   The chloroplasts can perform photosynthesis if removed from an algal cell.F) A) and D)
G) B) and E)

Question 18

Photosystem I initiates the electron transport chain that produces

Accepted Answer

A)   NADPH.
B)   ATP.
C)   NADH.
D)   glucose.
E)   water.F) C) and D)
G) B) and D)

Question 19

The survival of most organisms is immediately threatened if they live at the site of a catastrophic forest fire,volcanic eruption or dust storm.These events,however can launch soot,ash or dust into different levels of the atmosphere,measurably lowering available sunlight at locations thousands of miles from the site.The _____ are most quickly and strongly impacted at these distances,with lack of growth and reproduction.

Accepted Answer

A)   autotrophs, such as crops and woodlands
B)   heterotrophs, such as humans and livestock
C)   deep-sea thermal vent communities
D)   All of these will be impacted with similar severity.E) A) and B)
F) B) and C)

Question 20

Organisms that consume preexisting organic molecules are called

Accepted Answer

A)   animorphs.
B)   heterotrophs.
C)   plants.
D)   autotrophs.
E)   None of the answer choices are correct.F) A) and B)
G) D) and E)

Exam 5: Photosynthesis

The role of water in photosystem I is in contributing electrons,hydrogens,and oxygen.The resulting electrons in photosystem I

Correct Answer
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Correct Answer
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Photosystem I initiates the electron transport chain that produces

Correct Answer
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The proportion of oxygen in our atmosphere today

Correct Answer
verified

The reactions of photosynthesis may be summarized as:

Correct Answer
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Which of these portions of the electromagnetic spectrum has highest energy?

Correct Answer
verified

The rise of photosynthetic organisms increased the concentration of CO₂ in the atmosphere.

Correct Answer
verified

Organisms that consume preexisting organic molecules are called

Correct Answer
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How are algal chloroplasts able to perform photosynthesis in a sea slug?

Correct Answer
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The main byproduct molecule of photosynthesis that is released into the environment is

Correct Answer
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What will happen to the pH inside of a thylakoid that is exposed to light?

Correct Answer
verified

Discrete packets of kinetic energy in light are called

Correct Answer
verified

The reactant (reactants) of photosynthesis is (are)

Correct Answer
verified

Grana,thylakoids,and chloroplasts are structures in cells that are important to the process of photosynthesis.

Correct Answer
verified

Most biologists would agree that the most important metabolic pathway of living organisms is photosynthesis.

Correct Answer
verified

Blue light has _ energy than red light and is __ by a green leaf.

Correct Answer
verified

Accessory pigments include molecules that reflect reds,oranges and yellows.Leaves of many plants show these colors in the fall because

Correct Answer
verified

The organelle that carries out photosynthesis in plants is the

Correct Answer
verified

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -The Calvin cycle

Correct Answer
verified

Correct Answer
verified

Exam 5: Photosynthesis

The role of water in photosystem I is in contributing electrons,hydrogens,and oxygen.The resulting electrons in photosystem I

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Photosystem I initiates the electron transport chain that produces

Correct AnswerverifiedShow Answer

The proportion of oxygen in our atmosphere today

Correct AnswerverifiedShow Answer

The reactions of photosynthesis may be summarized as:

Correct AnswerverifiedShow Answer

Which of these portions of the electromagnetic spectrum has highest energy?

Correct AnswerverifiedShow Answer

The rise of photosynthetic organisms increased the concentration of CO2 in the atmosphere.

Correct AnswerverifiedShow Answer

Organisms that consume preexisting organic molecules are called

Correct AnswerverifiedShow Answer

How are algal chloroplasts able to perform photosynthesis in a sea slug?

Correct AnswerverifiedShow Answer

The main byproduct molecule of photosynthesis that is released into the environment is

Correct AnswerverifiedShow Answer

What will happen to the pH inside of a thylakoid that is exposed to light?

Correct AnswerverifiedShow Answer

Discrete packets of kinetic energy in light are called

Correct AnswerverifiedShow Answer

The reactant (reactants) of photosynthesis is (are)

Correct AnswerverifiedShow Answer

Grana,thylakoids,and chloroplasts are structures in cells that are important to the process of photosynthesis.

Correct AnswerverifiedShow Answer

Most biologists would agree that the most important metabolic pathway of living organisms is photosynthesis.

Correct AnswerverifiedShow Answer

Blue light has ___ energy than red light and is ____ by a green leaf.

Correct AnswerverifiedShow Answer

Accessory pigments include molecules that reflect reds,oranges and yellows.Leaves of many plants show these colors in the fall because

Correct AnswerverifiedShow Answer

The organelle that carries out photosynthesis in plants is the

Correct AnswerverifiedShow Answer

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -The Calvin cycle

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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The rise of photosynthetic organisms increased the concentration of CO₂ in the atmosphere.

Correct Answer
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Correct Answer
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Blue light has _ energy than red light and is __ by a green leaf.

Correct Answer
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Correct Answer
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