Question 1

How do plants compensate for rubisco's inefficiency at sugar production?

Accepted Answer

A)  Plants make a large amount of the enzyme. 
B)  Plants fix the carbon twice at two different times of day. 
C)  Plants fix the carbon only once. 
D)  Plants store products in vacuoles. 
E)  Plants only fix carbon at night. 
A)  Plants make a large amount of the enzyme. 
B)  Plants fix the carbon twice at two different times of day. 
C)  Plants fix the carbon only once. 
D)  Plants store products in vacuoles. 
E)  Plants only fix carbon at night.

Question 2

The products of light-dependent reactions of photosynthesis are ____.

Accepted Answer

A)  used in light-independent reactions 
B)  complex carbohydrates and proteins 
C)  stored in the vacuoles of the cell 
D)  oxygen and glucose 
E)  used in the light-independent reactions and stored in the vacuoles of the cell 
A)  used in light-independent reactions 
B)  complex carbohydrates and proteins 
C)  stored in the vacuoles of the cell 
D)  oxygen and glucose 
E)  used in the light-independent reactions and stored in the vacuoles of the cell

Question 3

What are the advantages of plants that minimize photorespiration?

Accepted Answer

A)  High sugar production can be maintained on hot, dry days. 
B)  Water is not necessary for the light-dependent reactions. 
C)  Carbon dioxide is not needed for the light-independent reactions. 
D)  Less sugar is necessary for metabolic activities. 
E)  Light-dependent reactions are more efficient. 
A)  High sugar production can be maintained on hot, dry days. 
B)  Water is not necessary for the light-dependent reactions. 
C)  Carbon dioxide is not needed for the light-independent reactions. 
D)  Less sugar is necessary for metabolic activities. 
E)  Light-dependent reactions are more efficient.

Question 4

How many carbon dioxide molecules does it take to synthesize one molecule of glucose?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  12 
E)  18 
A)  2 
B)  4 
C)  6 
D)  12 
E)  18

Question 5

In the thylakoid membrane, potential energy can be used to make ____.

Accepted Answer

A)  pyruvate 
B)  NADH 
C)  fats 
D)  lactate 
E)  ATP 
A)  pyruvate 
B)  NADH 
C)  fats 
D)  lactate 
E)  ATP

Question 6

You are a botanist living in the desert. A friend asks you which plant would be most practical to plant in his or her yard. What is your answer?

Accepted Answer

A)  any plant, as long as it is well-watered 
B)  only plants that do not minimize photorespiration 
C)  only plants that minimize photorespiration 
D)  only plants that minimize photorespiration and close the stomata during the day 
E)  plants that do not minimize photorespiration or plants that do minimize photorespiration but not plants that close the stomata during the day 
A)  any plant, as long as it is well-watered 
B)  only plants that do not minimize photorespiration 
C)  only plants that minimize photorespiration 
D)  only plants that minimize photorespiration and close the stomata during the day 
E)  plants that do not minimize photorespiration or plants that do minimize photorespiration but not plants that close the stomata during the day

Question 7

Which of the following molecule(s) is/are formed at the end of the electron transfer process?

Accepted Answer

A)  ATP only 
B)  NADPH only 
C)  ATP and NADPH 
D)  NADP+ 
E)  ATP and NADP+ 
A)  ATP only 
B)  NADPH only 
C)  ATP and NADPH 
D)  NADP+ 
E)  ATP and NADP+

Question 8

The human body is about ____ percent carbon by weight.

Accepted Answer

A)  0.0095 
B)  0.095 
C)  0.95 
D)  9.5 
E)  95 
A)  0.0095 
B)  0.095 
C)  0.95 
D)  9.5 
E)  95

Question 9

Visible light comprises wavelengths that vary between ____ nanometers.

Accepted Answer

A)  380 and 750 
B)  350 and 750 
C)  390 and 780 
D)  340 and 740 
E)  320 and 740 
A)  380 and 750 
B)  350 and 750 
C)  390 and 780 
D)  340 and 740 
E)  320 and 740

Question 10

The membrane that forms a compartment inside the stroma is the ____.

Accepted Answer

A)  thylakoid 
B)  mitochondrion 
C)  lamella 
D)  plastid 
E)  tracheid 
A)  thylakoid 
B)  mitochondrion 
C)  lamella 
D)  plastid 
E)  tracheid

Question 11

Which photosynthetic pigment is most efficient at absorbing near-infrared light?

Accepted Answer

A)  chlorophyll a 
B)  chlorophyll b 
C)  chlorophyll f 
D)  beta-carotene 
E)  phycocyanin 
A)  chlorophyll a 
B)  chlorophyll b 
C)  chlorophyll f 
D)  beta-carotene 
E)  phycocyanin

Question 12

The energy that drives the light-independent reactions comes from ____.

Accepted Answer

A)  sunlight 
B)  glucose 
C)  carbon dioxide 
D)  ATP and NADPH 
E)  water and oxygen 
A)  sunlight 
B)  glucose 
C)  carbon dioxide 
D)  ATP and NADPH 
E)  water and oxygen

Question 13

When organic molecules are broken and carbon dioxide is released into the atmosphere through burning, this is essentially the reverse of____.

Accepted Answer

A)  photosynthesis 
B)  carbon fixation 
C)  the Calvin-Benson cycle 
D)  photorespiration 
E)  ATP production 
A)  photosynthesis 
B)  carbon fixation 
C)  the Calvin-Benson cycle 
D)  photorespiration 
E)  ATP production

Question 14

Fossil fuels ____.

Accepted Answer

A)  can be recycled 
B)  are produced by living organisms 
C)  are the organic remains of ancient organisms 
D)  can reduce climate change 
E)  release less energy than wood when they are burned 
A)  can be recycled 
B)  are produced by living organisms 
C)  are the organic remains of ancient organisms 
D)  can reduce climate change 
E)  release less energy than wood when they are burned

Question 15

Which five-carbon molecule is the starting compound of the Calvin-Benson cycle?

Accepted Answer

A)  PGA 
B)  RuBP 
C)  NADPH 
D)  carbon dioxide 
E)  ATP 
A)  PGA 
B)  RuBP 
C)  NADPH 
D)  carbon dioxide 
E)  ATP

Question 16

The Calvin-Benson cycle is a cyclical pathway of reactions that use ____.

Accepted Answer

A)  carbon to produce sugar 
B)  sugar to produce energy 
C)  sugar to produce starch 
D)  starch to produce energy 
E)  oxygen to produce carbon dioxide 
A)  carbon to produce sugar 
B)  sugar to produce energy 
C)  sugar to produce starch 
D)  starch to produce energy 
E)  oxygen to produce carbon dioxide

Question 17

If a pigment absorbed violet, yellow, orange, red, and green light, what color would it appear to be?

Accepted Answer

A)  white 
B)  brown 
C)  black 
D)  blue 
E)  gray 
A)  white 
B)  brown 
C)  black 
D)  blue 
E)  gray

Question 18

In most plants, glucose is stored as ____.

Accepted Answer

A)  glucose 
B)  starch 
C)  sucrose 
D)  glycogen 
E)  cellulose 
A)  glucose 
B)  starch 
C)  sucrose 
D)  glycogen 
E)  cellulose

Question 19

Plant cells produce oxygen gas ____.

Accepted Answer

A)  by splitting carbon dioxide 
B)  during respiration 
C)  by splitting ribulose bisphosphate 
D)  by splitting molecules of water 
E)  by breaking down glucose 
A)  by splitting carbon dioxide 
B)  during respiration 
C)  by splitting ribulose bisphosphate 
D)  by splitting molecules of water 
E)  by breaking down glucose

Question 20

Leaves appear red in the fall when ____.

Accepted Answer

A)  anthocyanin synthesis increases 
B)  chlorophylls are disassembled and recycled to allow other pigments to become more visible 
C)  other pigments, including the orange and yellow accessory pigments, are recycled 
D)  synthesis of other pigments, including the orange and yellow accessory pigments, increases 
E)  the red wavelength range of visible light increases due to changes in Earth's position relative to the sun 
A)  anthocyanin synthesis increases 
B)  chlorophylls are disassembled and recycled to allow other pigments to become more visible 
C)  other pigments, including the orange and yellow accessory pigments, are recycled 
D)  synthesis of other pigments, including the orange and yellow accessory pigments, increases 
E)  the red wavelength range of visible light increases due to changes in Earth's position relative to the sun

Exam 5: Photosynthesis

How do plants compensate for rubisco's inefficiency at sugar production?

The products of light-dependent reactions of photosynthesis are ____.

What are the advantages of plants that minimize photorespiration?

How many carbon dioxide molecules does it take to synthesize one molecule of glucose?

In the thylakoid membrane, potential energy can be used to make ____.

You are a botanist living in the desert. A friend asks you which plant would be most practical to plant in his or her yard. What is your answer?

Which of the following molecule(s) is/are formed at the end of the electron transfer process?

The human body is about ____ percent carbon by weight.

Visible light comprises wavelengths that vary between ____ nanometers.

The membrane that forms a compartment inside the stroma is the ____.

Which photosynthetic pigment is most efficient at absorbing near-infrared light?

The energy that drives the light-independent reactions comes from ____.

When organic molecules are broken and carbon dioxide is released into the atmosphere through burning, this is essentially the reverse of____.

Fossil fuels ____.

Which five-carbon molecule is the starting compound of the Calvin-Benson cycle?

The Calvin-Benson cycle is a cyclical pathway of reactions that use ____.

If a pigment absorbed violet, yellow, orange, red, and green light, what color would it appear to be?

In most plants, glucose is stored as ____.

Plant cells produce oxygen gas ____.

Leaves appear red in the fall when ____.

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Releasing Chemical Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Prokaryotes, Protists, and Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Animal Reproduction and Development

Plant Form and Function

Life Cycles of Flowering Plants

Filters