Question 1

Which of the following statements would disqualify an organism as an autotroph?

Accepted Answer

A) They must take in organic matter to make energy. 
B) They produce their own food. 
C) They are autotrophs. 
D) They convert light energy into chemical energy. 
E) Cyanobacteria are autotrophs. 
A) They must take in organic matter to make energy. 
B) They produce their own food. 
C) They are autotrophs. 
D) They convert light energy into chemical energy. 
E) Cyanobacteria are autotrophs. A

Question 2

In C4 plants,the Calvin cycle occurs in the bundle sheath cells and not in the mesophyll cells.

Accepted Answer

A) True 
 B)False  True

Question 3

Which of the following is more true of a C3 plant rather than of a C4 plant?

Accepted Answer

A) They are specialized for environments with moderate temperatures and rainfall. 
B) Their mesophyll cells are arranged in parallel rows. 
C) They have chloroplasts in their mesophyll and bundle sheath cells. 
D) They work efficiently at low levels of carbon dioxide. 
E) They work efficiently at low levels of water. 
A) They are specialized for environments with moderate temperatures and rainfall. 
B) Their mesophyll cells are arranged in parallel rows. 
C) They have chloroplasts in their mesophyll and bundle sheath cells. 
D) They work efficiently at low levels of carbon dioxide. 
E) They work efficiently at low levels of water. A

Question 4

What is(are)the end product(s)of the light reactions in photosynthesis?

Accepted Answer

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

Question 5

Electrons move from photosystem II to photosystem I via what part of photosynthesis

Accepted Answer

A) Electron Transport Chain 
B) Reaction Center 
C) Electron Acceptors 
D) Pigment cComplexes 
E) Calvin Cycle 
A) Electron Transport Chain 
B) Reaction Center 
C) Electron Acceptors 
D) Pigment cComplexes 
E) Calvin Cycle

Question 6

The substance that initially traps solar energy in photosynthesis is

Accepted Answer

A) chlorophyll. 
B) RuBP. 
C) water. 
D) glucose. 
E) pyruvatE. 
A) chlorophyll. 
B) RuBP. 
C) water. 
D) glucose. 
E) pyruvatE.

Question 7

If a student was studying an ecosystem where the temperature and rainfall are moderate,which type of plant would most likely predominate?

Accepted Answer

A) C4 
B) CIM 
C) C3 
D) Mixed CAM/C3 
E) CAM 
A) C4 
B) CIM 
C) C3 
D) Mixed CAM/C3 
E) CAM

Question 8

Which of the following is a molecule which helps prepare for the Calvin cycle,rather than participating in it?

Accepted Answer

A) chlorophyll 
B) NADPH 
C) ATP 
D) RuBP 
E) G3P 
A) chlorophyll 
B) NADPH 
C) ATP 
D) RuBP 
E) G3P

Question 9

Because oxidation and reduction go hand in hand,the entire reaction is called a synthesis reaction.

Accepted Answer

A) True 
 B)False

Question 10

What would occur if a photosystem contained no antenna molecules?

Accepted Answer

A) Carbohydrate synthesis would increase. 
B) The chloroplast would synthesize more ATP. 
C) The Calvin cycle would fix carbon dioxide more rapidly. 
D) More oxygen would be released from the splitting of water. 
E) No reaction center electrons could become excited. 
A) Carbohydrate synthesis would increase. 
B) The chloroplast would synthesize more ATP. 
C) The Calvin cycle would fix carbon dioxide more rapidly. 
D) More oxygen would be released from the splitting of water. 
E) No reaction center electrons could become excited.

Question 11

The last step in the Calvin cycle is

Accepted Answer

A) carbon dioxide fixation. 
B) electron transport. 
C) carbon dioxide reduction. 
D) chemiosmosis. 
E) RuBP regeneration. 
A) carbon dioxide fixation. 
B) electron transport. 
C) carbon dioxide reduction. 
D) chemiosmosis. 
E) RuBP regeneration.

Question 12

When carbon dioxide is in limited supply,which of the following types of plants would have the greatest advantage?

Accepted Answer

A) C3 
B) annual 
C) short 
D) C4 
E) non-green 
A) C3 
B) annual 
C) short 
D) C4 
E) non-green

Question 13

Figure:  
-This figure shows a cross section of a typical plant leaf.What does "d" represent?

Accepted Answer

A) mesophyll 
B) stoma 
C) vein 
D) upper epidermis 
E) cuticle 
A) mesophyll 
B) stoma 
C) vein 
D) upper epidermis 
E) cuticle

Question 14

Photosystem II evolved before Photosystem I.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is reduced as a result of the Calvin cycle?

Accepted Answer

A) carbon dioxide 
B) oxygen 
C) light 
D) water 
E) glucose 
A) carbon dioxide 
B) oxygen 
C) light 
D) water 
E) glucose

Question 16

What would be the effect of increased oxygen on C3 plants?

Accepted Answer

A) increased photosynthetic efficiency 
B) increased carbon dioxide uptake 
C) switch to C4 photosynthesis 
D) switch to CAM photosynthesis 
E) decreased efficiency of photosynthesis 
A) increased photosynthetic efficiency 
B) increased carbon dioxide uptake 
C) switch to C4 photosynthesis 
D) switch to CAM photosynthesis 
E) decreased efficiency of photosynthesis

Question 17

The method of turning ADP into ATP is called chemiosmosis because ATP production is tied to a hydrogen ion gradient across a membrane.

Accepted Answer

A) True 
 B)False

Question 18

The reason that deciduous leaves turn red and yellow in the fall is

Accepted Answer

A) Chlorophyll is converted into bright carotenoid pigments. 
B) When chlorophyll breaks down,the red and yellow pigments which are already present become visible. 
C) It is a chemical reaction involving the formation of ice crystals. 
D) Bright pigments are shifted up from the roots while chlorophyll moves down. 
E) Red and yellow pigments can only be made when temperatures are cool. 
A) Chlorophyll is converted into bright carotenoid pigments. 
B) When chlorophyll breaks down,the red and yellow pigments which are already present become visible. 
C) It is a chemical reaction involving the formation of ice crystals. 
D) Bright pigments are shifted up from the roots while chlorophyll moves down. 
E) Red and yellow pigments can only be made when temperatures are cool.

Question 19

Why is a molecule that binds to and blocks the action of ATP synthase lethal to plants?

Accepted Answer

A) ATP synthase splits water and releases oxygen;without the production of oxygen,the plants will die. 
B) ATP synthase is the enzyme responsible for carbon dioxide fixation. 
C) The ATP produced by ATP synthase powers the Calvin cycle,the ultimate source of all organic molecules made by the plant. 
D) When ATP synthase is blocked,the electron transport chain moves electrons backwards to the reaction center. 
E) If ATP synthase is blocked,chemiosmosis cannot occur,and as a result the plant will run out of water and dehydratE. 
A) ATP synthase splits water and releases oxygen;without the production of oxygen,the plants will die. 
B) ATP synthase is the enzyme responsible for carbon dioxide fixation. 
C) The ATP produced by ATP synthase powers the Calvin cycle,the ultimate source of all organic molecules made by the plant. 
D) When ATP synthase is blocked,the electron transport chain moves electrons backwards to the reaction center. 
E) If ATP synthase is blocked,chemiosmosis cannot occur,and as a result the plant will run out of water and dehydratE.

Question 20

The carbon atoms in the carbohydrate produced by photosynthesis come from carbon dioxide.

Accepted Answer

A) True 
 B)False

Exam 6: Pathways of Photosynthesis

Which of the following statements would disqualify an organism as an autotroph?

In C4 plants,the Calvin cycle occurs in the bundle sheath cells and not in the mesophyll cells.

Which of the following is more true of a C3 plant rather than of a C4 plant?

What is(are)the end product(s)of the light reactions in photosynthesis?

Electrons move from photosystem II to photosystem I via what part of photosynthesis

The substance that initially traps solar energy in photosynthesis is

If a student was studying an ecosystem where the temperature and rainfall are moderate,which type of plant would most likely predominate?

Which of the following is a molecule which helps prepare for the Calvin cycle,rather than participating in it?

Because oxidation and reduction go hand in hand,the entire reaction is called a synthesis reaction.

What would occur if a photosystem contained no antenna molecules?

The last step in the Calvin cycle is

When carbon dioxide is in limited supply,which of the following types of plants would have the greatest advantage?

Figure: -This figure shows a cross section of a typical plant leaf.What does "d" represent?

Photosystem II evolved before Photosystem I.

Which of the following is reduced as a result of the Calvin cycle?

What would be the effect of increased oxygen on C3 plants?

The method of turning ADP into ATP is called chemiosmosis because ATP production is tied to a hydrogen ion gradient across a membrane.

The reason that deciduous leaves turn red and yellow in the fall is

Why is a molecule that binds to and blocks the action of ATP synthase lethal to plants?

The carbon atoms in the carbohydrate produced by photosynthesis come from carbon dioxide.

Biology, the Study of Life

Basic Chemistry of Cells

Organic Molecules of Cells

Structure and Function of Cells

Dynamic Activities of Cells

Pathways of Cellular Respiration

Cellular Reproduction

Sexual Reproduction

Patterns of Genetic Inheritance

Molecular Biology of Inheritance

Regulation of Gene Activity

Biotechnology and Genomics

Evidence of Evolution

Speciation and Evolution

The Evolutionary History of Life on Earth

Evolution of Microbial Life

Evolution of Protists

Evolution of Plants and Fungi

Evolution of Animals

Evolution of Humans

Plant Organization and Homeostasis

Transport and Nutrition in Plants

Control of Growth Responses in Plants

Reproduction in Plants

Animal Organization and Homeostasis

Coordination by Neural Signaling

Sense Organs

Locomotion and Support Systems

Circulation and Cardiovascular Systems

Lymph Transport and Immunity

Digestive Systems and Nutrition

Gas Exchange and Transport in Animals

Osmoregulation and Excretion

Coordination by Hormone Signaling

Reproduction and Development

Population Ecology

Behavioral Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation Biology

Filters

In C₄ plants,the Calvin cycle occurs in the bundle sheath cells and not in the mesophyll cells.

Which of the following is more true of a C₃ plant rather than of a C₄ plant?

What would be the effect of increased oxygen on C₃ plants?