Question 1

In chloroplasts, the Calvin-Benson cycle occurs in ____.

Accepted Answer

A)  pigments 
B)  the thylakoid membrane 
C)  the stomata 
D)  stroma 
E)  lysosomes 
A)  pigments 
B)  the thylakoid membrane 
C)  the stomata 
D)  stroma 
E)  lysosomes

Question 2

Photorespiration ____ the efficiency of sugar production and ____ the amount of carbon fixation.

Accepted Answer

A)  increases; increases 
B)  increases; decreases 
C)  decreases; increases 
D)  maintains; increases 
E)  decreases; decreases 
A)  increases; increases 
B)  increases; decreases 
C)  decreases; increases 
D)  maintains; increases 
E)  decreases; decreases

Question 3

When trees or other plants burn, ____ is released into the atmosphere.

Accepted Answer

A)  pyruvate 
B)  ethanol 
C)  acetaldehyde 
D)  acetyl CoA 
E)  lactate 
A)  pyruvate 
B)  ethanol 
C)  acetaldehyde 
D)  acetyl CoA 
E)  lactate

Question 4

The electrons that are passed to NADP+ at the end of the electron transfer chain were obtained from ____.

Accepted Answer

A)  water 
B)  CO2 
C)  glucose 
D)  sunlight 
E)  ATP 
A)  water 
B)  CO2 
C)  glucose 
D)  sunlight 
E)  ATP

Question 5

Which group of molecules serves as inputs for the light-independent reactions?

Accepted Answer

A)  H2O, ATP, and NADPH 
B)  CO2, NADPH, and H2O 
C)  CO2 and NADPH 
D)  ATP, NADPH, H2O, and CO2 
E)  NADPH, ATP, and CO2 
A)  H2O, ATP, and NADPH 
B)  CO2, NADPH, and H2O 
C)  CO2 and NADPH 
D)  ATP, NADPH, H2O, and CO2 
E)  NADPH, ATP, and CO2

Question 6

The distance between the crests of two successive waves of light is known as the ____.

Accepted Answer

A)  wave frequency 
B)  wave period 
C)  wave distance 
D)  wavelength 
E)  wave space 
A)  wave frequency 
B)  wave period 
C)  wave distance 
D)  wavelength 
E)  wave space

Question 7

In the fall, ____ become(s) visible in plants that are preparing for dormancy.

Accepted Answer

A)  accessory pigments 
B)  chlorophyll a 
C)  polysiphonia 
D)  gamma rays 
E)  radio waves 
A)  accessory pigments 
B)  chlorophyll a 
C)  polysiphonia 
D)  gamma rays 
E)  radio waves

Question 8

What is the role of electron transfer phosphorylation in the light-dependent reactions of photosynthesis?

Accepted Answer

A)  to provide electrons for NADH 
B)  to accept energy from glucose 
C)  to accept electrons from electron transport 
D)  to provide kinetic energy for ATP synthase 
E)  to donate electrons for electron transport 
A)  to provide electrons for NADH 
B)  to accept energy from glucose 
C)  to accept electrons from electron transport 
D)  to provide kinetic energy for ATP synthase 
E)  to donate electrons for electron transport

Question 9

In the thylakoid membrane, the hydrogen gradient is a form of ____ energy.

Accepted Answer

A)  kinetic 
B)  thermal 
C)  potential 
D)  chemical 
E)  electrical 
A)  kinetic 
B)  thermal 
C)  potential 
D)  chemical 
E)  electrical

Question 10

Which enzyme carries out carbon fixation during the Calvin-Benson cycle?

Accepted Answer

A)  nitrogen 
B)  protease 
C)  carbon 
D)  rubisco 
E)  NADPH 
A)  nitrogen 
B)  protease 
C)  carbon 
D)  rubisco 
E)  NADPH

Question 11

When chlorophyll absorbs light energy, ____.

Accepted Answer

A)  chlorophyll is converted to carotene 
B)  the molecules begin to move more rapidly 
C)  the plant becomes radioactive 
D)  electrons jump to a higher energy level 
E)  the molecules become ionized 
A)  chlorophyll is converted to carotene 
B)  the molecules begin to move more rapidly 
C)  the plant becomes radioactive 
D)  electrons jump to a higher energy level 
E)  the molecules become ionized

Question 12

Why does the efficiency of sugar production decrease when stomata are closed in C3 plants?

Accepted Answer

A)  Accumulated oxygen outcompetes carbon dioxide for rubisco's active site. 
B)  Depleted carbon dioxide outcompetes oxygen for rubisco's binding site. 
C)  Accumulated oxygen inhibits rubisco's function. 
D)  Depleted carbon dioxide inhibits rubisco's function. 
E)  Depleted carbon dioxide activates rubisco's function. 
A)  Accumulated oxygen outcompetes carbon dioxide for rubisco's active site. 
B)  Depleted carbon dioxide outcompetes oxygen for rubisco's binding site. 
C)  Accumulated oxygen inhibits rubisco's function. 
D)  Depleted carbon dioxide inhibits rubisco's function. 
E)  Depleted carbon dioxide activates rubisco's function.

Question 13

The purpose of closing stomata in plants is to prevent ____.

Accepted Answer

A)  carbon dioxide from escaping 
B)  water from escaping 
C)  oxygen from reentering 
D)  gas exchange 
E)  photosynthesis 
A)  carbon dioxide from escaping 
B)  water from escaping 
C)  oxygen from reentering 
D)  gas exchange 
E)  photosynthesis

Question 14

Light-independent reactions occur in the ____.

Accepted Answer

A)  cytoplasm 
B)  chloroplast outer membrane 
C)  thylakoid membrane 
D)  stroma 
E)  matrix 
A)  cytoplasm 
B)  chloroplast outer membrane 
C)  thylakoid membrane 
D)  stroma 
E)  matrix

Question 15

How many PGA molecules (net yield) are produced per molecule of CO2 during carbon fixation?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  36 
E)  38 
A)  1 
B)  2 
C)  4 
D)  36 
E)  38

Question 16

The Calvin-Benson cycle takes place in ____.

Accepted Answer

A)  the cytoplasm 
B)  mitochondria 
C)  chloroplasts 
D)  thylakoids 
E)  peroxisomes 
A)  the cytoplasm 
B)  mitochondria 
C)  chloroplasts 
D)  thylakoids 
E)  peroxisomes

Question 17

What does beta-carotene do?

Accepted Answer

A)  improve the efficiency pigments 
B)  act as coenzymes in glycolysis 
C)  neutralize free radicals 
D)  remove chlorophyll 
E)  enhance photosynthetic activity 
A)  improve the efficiency pigments 
B)  act as coenzymes in glycolysis 
C)  neutralize free radicals 
D)  remove chlorophyll 
E)  enhance photosynthetic activity

Question 18

Which of the following molecules is/are formed at the end of the electron transfer phosphorylation?

Accepted Answer

A)  ATP 
B)  NADPH 
C)  ATP and NADPH 
D)  FADH2 
E)  H2O 
A)  ATP 
B)  NADPH 
C)  ATP and NADPH 
D)  FADH2 
E)  H2O

Question 19

In which of the following do the light-dependent reactions of photosynthesis take place?

Accepted Answer

A)  thylakoid membranes 
B)  stroma 
C)  the outermost membrane 
D)  between the outermost and innermost membranes 
E)  a combination of more than one of these 
A)  thylakoid membranes 
B)  stroma 
C)  the outermost membrane 
D)  between the outermost and innermost membranes 
E)  a combination of more than one of these

Exam 5: Photosynthesis

In chloroplasts, the Calvin-Benson cycle occurs in ____.

Photorespiration ____ the efficiency of sugar production and ____ the amount of carbon fixation.

When trees or other plants burn, ____ is released into the atmosphere.

The electrons that are passed to NADP+ at the end of the electron transfer chain were obtained from ____.

Which group of molecules serves as inputs for the light-independent reactions?

The distance between the crests of two successive waves of light is known as the ____.

In the fall, ____ become(s) visible in plants that are preparing for dormancy.

What is the role of electron transfer phosphorylation in the light-dependent reactions of photosynthesis?

In the thylakoid membrane, the hydrogen gradient is a form of ____ energy.

Which enzyme carries out carbon fixation during the Calvin-Benson cycle?

When chlorophyll absorbs light energy, ____.

Why does the efficiency of sugar production decrease when stomata are closed in C3 plants?

The purpose of closing stomata in plants is to prevent ____.

Light-independent reactions occur in the ____.

How many PGA molecules (net yield) are produced per molecule of CO2 during carbon fixation?

The Calvin-Benson cycle takes place in ____.

What does beta-carotene do?

Which of the following molecules is/are formed at the end of the electron transfer phosphorylation?

In which of the following do the light-dependent reactions of photosynthesis take place?

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

Photorespiration the efficiency of sugar production and the amount of carbon fixation.

The electrons that are passed to NADP⁺ at the end of the electron transfer chain were obtained from ____.

How many PGA molecules (net yield) are produced per molecule of CO₂ during carbon fixation?