Question 1

Clusters of light-gathering pigments in a photosystem

Accepted Answer

A)  pass energy to the reaction center. 
B)  are found in the roots of plants. 
C)  absorb electrons. 
D)  break down H2O. 
A)  pass energy to the reaction center. 
B)  are found in the roots of plants. 
C)  absorb electrons. 
D)  break down H2O.

Question 2

It has been suggested that scientists should attempt to genetically engineer a plant to have black leaves so that it would perform photosynthesis more efficiently. What is the likely reason behind this idea?

Accepted Answer

A)  Black plants would heat up faster and therefore all chemical reactions including photosynthesis would operate faster. 
B)  A black plant would reflect all wavelengths and therefore have more energy to drive photosynthesis. 
C)  A black plant would absorb all wavelengths and therefore absorb more light energy that powers photosynthesis. 
D)  A black plant would absorb green wavelengths like most plants, but would absorb them more efficiently. 
A)  Black plants would heat up faster and therefore all chemical reactions including photosynthesis would operate faster. 
B)  A black plant would reflect all wavelengths and therefore have more energy to drive photosynthesis. 
C)  A black plant would absorb all wavelengths and therefore absorb more light energy that powers photosynthesis. 
D)  A black plant would absorb green wavelengths like most plants, but would absorb them more efficiently.

Question 3

The graph shows records of temperature (light gray line) and COS1U1B12S1U1B0 (dark gray line) over the past 1,000 years. COS1U1B12S1U1B0 is recorded in parts per million (ppm).
-Currently, atmospheric CO2 levels are approximately 400 ppm. The annual mean growth rate in CO2 is about 2 ppm/year. Assuming this trend continues, what would you predict the CO2 level to be in 100 years?

Accepted Answer

A)  100 ppm 
B)  200 ppm 
C)  600 ppm 
D)  1,000 ppm 
A)  100 ppm 
B)  200 ppm 
C)  600 ppm 
D)  1,000 ppm

Question 4

Which of the following colors contributes the least energy to photosynthesis?

Accepted Answer

A)  blue 
B)  red 
C)  orange 
D)  green 
A)  blue 
B)  red 
C)  orange 
D)  green

Question 5

Chlorophyll is located in ________, which are found in ________, which are concentrated in ________.

Accepted Answer

A)  thylakoids; chloroplasts; mesophyll 
B)  chloroplasts; thylakoids; mesophyll 
C)  mesophyll; chloroplasts; thylakoids 
D)  mesophyll; thylakoids; chloroplasts 
A)  thylakoids; chloroplasts; mesophyll 
B)  chloroplasts; thylakoids; mesophyll 
C)  mesophyll; chloroplasts; thylakoids 
D)  mesophyll; thylakoids; chloroplasts

Question 6

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

Accepted Answer

A)  stroma; thylakoid membranes 
B)  stroma; nucleus 
C)  cytoplasm; thylakoid membrane 
D)  thylakoid membranes; stroma 
A)  stroma; thylakoid membranes 
B)  stroma; nucleus 
C)  cytoplasm; thylakoid membrane 
D)  thylakoid membranes; stroma

Question 7

Atrazine is a widely used herbicide that binds to a protein in photosystem II, ultimately causing a breakdown in electron transport. Atrazine would first inhibit the production of

Accepted Answer

A)  NADPH. 
B)  G3P. 
C)  ATP. 
D)  O2. 
A)  NADPH. 
B)  G3P. 
C)  ATP. 
D)  O2.

Question 8

To produce one glucose, the Calvin cycle needs to be run ________ times.

Accepted Answer

A)  two 
B)  four 
C)  six 
D)  eight 
A)  two 
B)  four 
C)  six 
D)  eight

Question 9

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

Accepted Answer

A)  stomata. 
B)  thylakoid. 
C)  matrix. 
D)  stroma. 
A)  stomata. 
B)  thylakoid. 
C)  matrix. 
D)  stroma.

Question 10

You want to use radioactively labeled oxygen to trace carbon fixation in a plant. You should incorporate the radioactively labeled oxygen into

Accepted Answer

A)  O2. 
B)  CO2. 
C)  H2O. 
D)  C6H12O6. 
A)  O2. 
B)  CO2. 
C)  H2O. 
D)  C6H12O6.

Question 11

It has been suggested that scientists mimic photosynthesis by building artificial leaves that can respond to electricity from solar cells. The electricity could be applied to the leaves to split water into oxygen and hydrogen. The hydrogen could then be used a fuel. Which of these is the best explanation of how this mimics photosynthesis?

Accepted Answer

A)  Both this proposed process and photosynthesis store solar energy as electricity for later use. 
B)  Both this proposed process and photosynthesis split water into hydrogen and oxygen. 
C)  The mimic leaves would have to be green like photosynthesizing leaves in order to respond to light. 
D)  Both processes convert electrical energy to light energy. 
A)  Both this proposed process and photosynthesis store solar energy as electricity for later use. 
B)  Both this proposed process and photosynthesis split water into hydrogen and oxygen. 
C)  The mimic leaves would have to be green like photosynthesizing leaves in order to respond to light. 
D)  Both processes convert electrical energy to light energy.

Question 12

Which of the following are produced during the Calvin cycle?

Accepted Answer

A)  glucose, ADP, NADP+ 
B)  glucose, ADP, NADP+, CO2 
C)  ATP, NADPH, O2 
D)  ATP, NADPH, CO2 
A)  glucose, ADP, NADP+ 
B)  glucose, ADP, NADP+, CO2 
C)  ATP, NADPH, O2 
D)  ATP, NADPH, CO2

Question 13

Chlorophyll b

Accepted Answer

A)  is best at absorbing the energy of green light. 
B)  is best at absorbing the energy of blue-violet and red light, just like chlorophyll a. 
C)  passes absorbed energy to chlorophyll a. 
D)  catalyzes the incorporation of carbon atoms into RuBP. 
A)  is best at absorbing the energy of green light. 
B)  is best at absorbing the energy of blue-violet and red light, just like chlorophyll a. 
C)  passes absorbed energy to chlorophyll a. 
D)  catalyzes the incorporation of carbon atoms into RuBP.

Question 14

Which of the following molecules are products of photosynthesis?

Accepted Answer

A)  CO2 and chlorophyll 
B)  glucose and O2 
C)  O2 and CO2 
D)  glucose and CO2 
A)  CO2 and chlorophyll 
B)  glucose and O2 
C)  O2 and CO2 
D)  glucose and CO2

Question 15

Which of the following photosynthetic pigments can be found at the photosystem reaction center?

Accepted Answer

A)  chlorophyll b 
B)  chlorophyll a 
C)  a carotenoid 
A)  chlorophyll b 
B)  chlorophyll a 
C)  a carotenoid

Question 16

ATP and NADPH

Accepted Answer

A)  power sugar synthesis during the Calvin cycle. 
B)  are products of the Calvin cycle. 
C)  provide energy to photosystem I and photosystem II. 
D)  are used in the electron transport chain to pump H+ into the thylakoid space. 
A)  power sugar synthesis during the Calvin cycle. 
B)  are products of the Calvin cycle. 
C)  provide energy to photosystem I and photosystem II. 
D)  are used in the electron transport chain to pump H+ into the thylakoid space.

Question 17

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?

Accepted Answer

A)  H and O both in glucose 
B)  H in glucose; O in water 
C)  H in water; O in glucose 
D)  H in glucose and water; O in O2 
A)  H and O both in glucose 
B)  H in glucose; O in water 
C)  H in water; O in glucose 
D)  H in glucose and water; O in O2

Question 18

Many of the regions of the world where hunger is prevalent are also regions with hot and dry climates. What types of agricultural crops would you suggest that these regions attempt to grow?

Accepted Answer

A)  C3 plants, such as wheat and rice 
B)  C3 plants and C4 plants, such as corn and sugarcane 
C)  C3 plants and CAM plants, such as prickly pear and pineapple 
D)  C4 plants and CAM plants 
A)  C3 plants, such as wheat and rice 
B)  C3 plants and C4 plants, such as corn and sugarcane 
C)  C3 plants and CAM plants, such as prickly pear and pineapple 
D)  C4 plants and CAM plants

Question 19

A redox reaction involves the transfer of

Accepted Answer

A)  oxygen. 
B)  water. 
C)  an electron. 
D)  a proton 
A)  oxygen. 
B)  water. 
C)  an electron. 
D)  a proton

Question 20

Photorespiration

Accepted Answer

A)  may be an evolutionary relic from when atmospheric O2 levels were low. 
B)  is of benefit to the plant since it breaks down rubisco. 
C)  is attributable to high CO2 levels. 
D)  produces glucose. 
A)  may be an evolutionary relic from when atmospheric O2 levels were low. 
B)  is of benefit to the plant since it breaks down rubisco. 
C)  is attributable to high CO2 levels. 
D)  produces glucose.

Exam 7: Photosynthesis: Using Light to Make Food

Clusters of light-gathering pigments in a photosystem

It has been suggested that scientists should attempt to genetically engineer a plant to have black leaves so that it would perform photosynthesis more efficiently. What is the likely reason behind this idea?

Which of the following colors contributes the least energy to photosynthesis?

Chlorophyll is located in ________, which are found in ________, which are concentrated in ________.

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

Atrazine is a widely used herbicide that binds to a protein in photosystem II, ultimately causing a breakdown in electron transport. Atrazine would first inhibit the production of

To produce one glucose, the Calvin cycle needs to be run ________ times.

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

You want to use radioactively labeled oxygen to trace carbon fixation in a plant. You should incorporate the radioactively labeled oxygen into

Which of the following are produced during the Calvin cycle?

Chlorophyll b

Which of the following molecules are products of photosynthesis?

Which of the following photosynthetic pigments can be found at the photosystem reaction center?

ATP and NADPH

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?

Many of the regions of the world where hunger is prevalent are also regions with hot and dry climates. What types of agricultural crops would you suggest that these regions attempt to grow?

A redox reaction involves the transfer of

Photorespiration

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

DNA Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure, Growth, and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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Chlorophyll is located in , which are found in , which are concentrated in .

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