Question 1

Phosphoenylpyruvate carboxylase (PEPCase)fixes carbon dioxide(C1)to PEP(C3)to form oxaloacetate(C4)within mesophyll cells of the C-4 plants.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following pairs is correct?

Accepted Answer

A) C4 plants = bundle sheath cells contain chlorophyll 
B) C3 plants = bundle sheath cells contain chlorophyll 
C) CAM plants = epidermal cells that contain chlorophyll 
D) C4 plants = stoma that contain chlorophyll 
A) C4 plants = bundle sheath cells contain chlorophyll 
B) C3 plants = bundle sheath cells contain chlorophyll 
C) CAM plants = epidermal cells that contain chlorophyll 
D) C4 plants = stoma that contain chlorophyll

Question 3

During the light reactions what structure is responsible for absorbing the solar energy?

Accepted Answer

A) chloroplast 
B) stroma 
C) stoma 
D) bark of the tree 
A) chloroplast 
B) stroma 
C) stoma 
D) bark of the tree

Question 4

C-4 plants

Accepted Answer

A) store carbon dioxide temporarily as oxaloacetate. 
B) are found in hot dry climates. 
C) have a net photosynthetic rate two to three times that of C-3 plants. 
D) All of the choices are correct. 
A) store carbon dioxide temporarily as oxaloacetate. 
B) are found in hot dry climates. 
C) have a net photosynthetic rate two to three times that of C-3 plants. 
D) All of the choices are correct.

Question 5

forms a six-carbon molecule that immediately breaks down into two three-carbon PGA molecules.

Accepted Answer

A) True 
 B)False

Question 6

To what does the term stroma refer?

Accepted Answer

A) the double membrane of the chloroplast 
B) a flattened disk or sac in the chloroplast 
C) a stack of thylakoid membrane structures 
D) the central fluid-filled space of the chloroplast 
E) the cytochrome system in the membranes of the thylakoids 
A) the double membrane of the chloroplast 
B) a flattened disk or sac in the chloroplast 
C) a stack of thylakoid membrane structures 
D) the central fluid-filled space of the chloroplast 
E) the cytochrome system in the membranes of the thylakoids

Question 7

An early experiment by Van Helmont (1600s)describes how he "grew a tree in a large pot and found that after five years,the amount of soil in the pot had not changed.He concluded that the increase in weight was due to the addition of water." At that time,the compounds in the air had not yet been identified.Today,you know that he only discovered half the story.Which additional experiment would provide evidence for the rest of the story?

Accepted Answer

A) A very careful audit of the water taken in and lost by the tree would have revealed only half the added weight gained by the tree. 
B) Carbon is discovered as a major element in trees and is lacking in water molecules. 
C) Radioactive carbon in CO2 in the air is soon located as part of tree structures. 
D) The critical experiment involves the conversion of nutrients in the soil. 
E) All but the nutrient conversion is correct. 
A) A very careful audit of the water taken in and lost by the tree would have revealed only half the added weight gained by the tree. 
B) Carbon is discovered as a major element in trees and is lacking in water molecules. 
C) Radioactive carbon in CO2 in the air is soon located as part of tree structures. 
D) The critical experiment involves the conversion of nutrients in the soil. 
E) All but the nutrient conversion is correct.

Question 8

Which is most closely associated with the Calvin cycle?

Accepted Answer

A) ATP production 
B) oxygen production 
C) carbon dioxide fixation 
D) carbon dioxide production 
E) removal of electrons from water for passage through an electron transport system 
A) ATP production 
B) oxygen production 
C) carbon dioxide fixation 
D) carbon dioxide production 
E) removal of electrons from water for passage through an electron transport system

Question 9

Why are plants green?

Accepted Answer

A) They absorb only green wavelengths of light. 
B) They absorb only yellow and blue wavelengths of light. 
C) They reflect nearly all wavelengths of light. 
D) They reflect green wavelengths of light and absorb blue and red light. 
E) They reflect yellow and blue wavelengths of light. 
A) They absorb only green wavelengths of light. 
B) They absorb only yellow and blue wavelengths of light. 
C) They reflect nearly all wavelengths of light. 
D) They reflect green wavelengths of light and absorb blue and red light. 
E) They reflect yellow and blue wavelengths of light.

Question 10

Plants that conduct C-4 metabolism are desert plants.

Accepted Answer

A) True 
 B)False

Question 11

When an electron has been excited to a higher energy state,it can then drop back to the original level,re-emitting the light as fluorescence.When chlorophyll is extracted in solution,and a bright red or blue light is shown on it,the chlorophyll fluoresces brightly.However,when the chlorophyll is packaged inside chloroplasts and the red or blue light is turned on,there is no fluorescence.This most likely indicates that

Accepted Answer

A) the red and blue light waves are reflected by the chlorophyll membrane. 
B) chlorophyll in solution is a different molecule than chlorophyll in a chloroplast. 
C) excited electrons are transferred to electron acceptors in the chloroplast. 
D) fluorescence does not work in living cells. 
E) green light must be used to make living cells fluoresce. 
A) the red and blue light waves are reflected by the chlorophyll membrane. 
B) chlorophyll in solution is a different molecule than chlorophyll in a chloroplast. 
C) excited electrons are transferred to electron acceptors in the chloroplast. 
D) fluorescence does not work in living cells. 
E) green light must be used to make living cells fluoresce.

Question 12

What structure is required for an organism to be classified as an autotroph?

Accepted Answer

A) chloroplast 
B) mitochondria 
C) nucleus 
D) Golgi Body 
A) chloroplast 
B) mitochondria 
C) nucleus 
D) Golgi Body

Question 13

Which of the following plants is an example of a CAM plant?

Accepted Answer

A) cactus 
B) corn 
C) rice 
D) wheat 
E) oak tree 
A) cactus 
B) corn 
C) rice 
D) wheat 
E) oak tree

Question 14

Protons (H+)accumulate in the thylakoid space during electron transport between photosystems I and II.The excess of protons in the thylakoid space

Accepted Answer

A) enters the photorespiration pathway. 
B) converts NADP to NADPH and generates ATP in the process. 
C) is small enough to diffuse back out through the lipid bilayer. 
D) raises the pH of the space until the processes stop. 
E) moves from the thylakoid space to the stroma through an ATP synthase complex channel that generates ATP. 
A) enters the photorespiration pathway. 
B) converts NADP to NADPH and generates ATP in the process. 
C) is small enough to diffuse back out through the lipid bilayer. 
D) raises the pH of the space until the processes stop. 
E) moves from the thylakoid space to the stroma through an ATP synthase complex channel that generates ATP.

Question 15

The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.

Accepted Answer

A) True 
 B)False

Question 16

A product of photosynthesis,__________,is the chief source of energy for most organisms.

Accepted Answer

A) Oxygen 
B) Sucrose 
C) Glucose 
D) All of the above 
A) Oxygen 
B) Sucrose 
C) Glucose 
D) All of the above

Question 17

Which of the following statements about the Calvin cycle is correct?

Accepted Answer

A) the CO2 is absorbed and reduced to CH2O 
B) the CO2 is absorbed and reduced to C2H2O2 
C) the CO- is absorbed and reduced to CH2O 
D) the CO2 is absorbed and used to form ATP 
A) the CO2 is absorbed and reduced to CH2O 
B) the CO2 is absorbed and reduced to C2H2O2 
C) the CO- is absorbed and reduced to CH2O 
D) the CO2 is absorbed and used to form ATP

Question 18

What is the ultimate destination for the energized electrons during the light reactions of photosynthesis?

Accepted Answer

A) they are taken up by NADP+ to produce NADPH 
B) they are taken up by NADPH to produce NADP+ 
C) they are taken up by NADH to produce NAD+ 
D) they are taken up by NAD+ to produce NADH 
A) they are taken up by NADP+ to produce NADPH 
B) they are taken up by NADPH to produce NADP+ 
C) they are taken up by NADH to produce NAD+ 
D) they are taken up by NAD+ to produce NADH

Question 19

Photorespiration is the process by which light is used to release the stored energy in carbohydrate molecules to perform all work in plant cells.

Accepted Answer

A) True 
 B)False

Question 20

What are the end products of photosynthesis?

Accepted Answer

A) water and carbon dioxide 
B) water and oxygen 
C) oxygen and carbohydrate 
D) carbohydrate and water 
A) water and carbon dioxide 
B) water and oxygen 
C) oxygen and carbohydrate 
D) carbohydrate and water

Exam 7: Photosynthesis

Phosphoenylpyruvate carboxylase (PEPCase)fixes carbon dioxide(C1)to PEP(C3)to form oxaloacetate(C4)within mesophyll cells of the C-4 plants.

Which of the following pairs is correct?

During the light reactions what structure is responsible for absorbing the solar energy?

C-4 plants

forms a six-carbon molecule that immediately breaks down into two three-carbon PGA molecules.

To what does the term stroma refer?

Which is most closely associated with the Calvin cycle?

Why are plants green?

Plants that conduct C-4 metabolism are desert plants.

What structure is required for an organism to be classified as an autotroph?

Which of the following plants is an example of a CAM plant?

Protons (H+)accumulate in the thylakoid space during electron transport between photosystems I and II.The excess of protons in the thylakoid space

The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.

A product of photosynthesis,__________,is the chief source of energy for most organisms.

Which of the following statements about the Calvin cycle is correct?

What is the ultimate destination for the energized electrons during the light reactions of photosynthesis?

Photorespiration is the process by which light is used to release the stored energy in carbohydrate molecules to perform all work in plant cells.

What are the end products of photosynthesis?

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

Phosphoenylpyruvate carboxylase (PEPCase)fixes carbon dioxide(C₁)to PEP(C₃)to form oxaloacetate(C₄)within mesophyll cells of the C-4 plants.

Protons (H⁺)accumulate in the thylakoid space during electron transport between photosystems I and II.The excess of protons in the thylakoid space