Question 1

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once.
-​photosystems I and II

Accepted Answer

A) thylakoid membrane 
B) stroma 
C) thylakoid compartment 
A) thylakoid membrane 
B) stroma 
C) thylakoid compartment A

Question 2

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once.
-​ATP synthase

Accepted Answer

A) thylakoid membrane 
B) stroma 
C) thylakoid compartment 
A) thylakoid membrane 
B) stroma 
C) thylakoid compartment A

Question 3

Twelve PGAL molecules form when six carbon dioxide molecules are attached to six RuBP molecules. Only two of these PGAL molecules are needed to form a 6-carbon sugar. What is the fate of the 10 remaining PGAL molecules?

Accepted Answer

A) They are degraded. 
B) They are converted back to carbon dioxide. 
C) They are stored as extra PGAL molecules. 
D) They are used during photorespiration. 
E) They are converted to RuBP molecules. 
A) They are degraded. 
B) They are converted back to carbon dioxide. 
C) They are stored as extra PGAL molecules. 
D) They are used during photorespiration. 
E) They are converted to RuBP molecules. E

Question 4

Why is rubisco the most abundant protein on Earth?​

Accepted Answer

Photorespiration produces CO₂ and ammonia

Question 5

Why do the cells of photosynthetic organisms contain accessory pigments?

Accepted Answer

A) Accessory pigments provide a backup source of energy if the main pigment type fails. 
B) Accessory pigments direct light toward the primary pigment. 
C) Accessory pigments optimize the amount of energy that can be harvested in specific environments. 
D) Accessory pigments provide structural support for the primary pigments. 
E) Accessory pigments allow photosynthesis to occur at any time of the day. 
A) Accessory pigments provide a backup source of energy if the main pigment type fails. 
B) Accessory pigments direct light toward the primary pigment. 
C) Accessory pigments optimize the amount of energy that can be harvested in specific environments. 
D) Accessory pigments provide structural support for the primary pigments. 
E) Accessory pigments allow photosynthesis to occur at any time of the day.

Question 6

​Why is photorespiration an inefficient way to produce sugars?

Accepted Answer

A) ​Photorespiration produces 7-carbon carbohydrate molecules instead of 6-carbon sugars. 
B) ​The increased production of O2 during photorespiration generates excess dangerous free radicals. 
C) ​Photorespiration only occurs during the night, when the light-dependent reactions are inactive. 
D) ​CO2 is lost instead of being fixed and ATP is required to detoxify the ammonia that is produced. 
E) ​Carbon fixation requires an extra turn of the Calvin-Benson cycle for each molecule of sugar produced. 
A) ​Photorespiration produces 7-carbon carbohydrate molecules instead of 6-carbon sugars. 
B) ​The increased production of O2 during photorespiration generates excess dangerous free radicals. 
C) ​Photorespiration only occurs during the night, when the light-dependent reactions are inactive. 
D) ​CO2 is lost instead of being fixed and ATP is required to detoxify the ammonia that is produced. 
E) ​Carbon fixation requires an extra turn of the Calvin-Benson cycle for each molecule of sugar produced.

Question 7

-In the accompanying figure, what does letter E represent?

Accepted Answer

A) carbon dioxide 
B) light energy 
C) glucose 
D) ATP 
E) oxygen 
A) carbon dioxide 
B) light energy 
C) glucose 
D) ATP 
E) oxygen

Question 8

Four of the five items listed below participate in photosynthesis. Select the exception.

Accepted Answer

A) photosystem 
B) chlorophyll 
C) mitochondrion 
D) chloroplast 
E) thylakoid membrane 
A) photosystem 
B) chlorophyll 
C) mitochondrion 
D) chloroplast 
E) thylakoid membrane

Question 9

Match the process to the correct description.
-PGA to PGAL conversion

Accepted Answer

A) Rubisco attaches CO2 to RuBP. 
B) ATP and NADPH are required. 
C) Two PGALs combine to form a six-carbon product. 
D) O2, ATP, and NADPH are produced. 
E) An electron transport system produces ATP but not NADPH. 
A) Rubisco attaches CO2 to RuBP. 
B) ATP and NADPH are required. 
C) Two PGALs combine to form a six-carbon product. 
D) O2, ATP, and NADPH are produced. 
E) An electron transport system produces ATP but not NADPH.

Question 10

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once.
-accumulation of hydrogen ions

Accepted Answer

A) thylakoid membrane 
B) stroma 
C) thylakoid compartment 
A) thylakoid membrane 
B) stroma 
C) thylakoid compartment

Question 11

About 200 years ago, Jan Baptista van Helmont wondered how growing plants obtained the materials necessary for growth. He planted a tree seedling weighing 5 pounds in a barrel filled with 200 pounds of soil and then watered the tree regularly. After five years, the tree weighed 169 pounds, 3 ounces, and the soil weighed 199 pounds, 14 ounces. Because the tree had gained so much weight and the soil had lost so little, he concluded that the tree had gained all of its additional weight by absorbing the water he had added to the barrel. Of course he was incorrect. What really happened?

Accepted Answer

Let's look at the possibilities. The gai

Question 12

What do photosynthetic autotrophs use as a carbon source? What do they use as an energy source?

Accepted Answer

carbon dio

Question 13

Match the description to the correct photosynthetic pathway.
-This process involves a photolysis step, breaking water into hydrogen ions and oxygen.

Accepted Answer

A) light-dependent reactions in the noncyclic pathway 
B) light-dependent reactions in the cyclic pathway 
C) Calvin-Benson cycle 
D) C4 pathway 
E) photorespiration 
A) light-dependent reactions in the noncyclic pathway 
B) light-dependent reactions in the cyclic pathway 
C) Calvin-Benson cycle 
D) C4 pathway 
E) photorespiration

Question 14

-According to the accompanying diagram, where are hydrogen ions sequestered?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 15

The cyclic pathway of light-dependent reactions uses ____ to absorb light energy and emit electrons.​

Accepted Answer

A) ​photosystems I and II 
B) ​photosystem II only 
C) ​photosystem I only 
D) ​ß-carotene 
E) ​ATP synthase 
A) ​photosystems I and II 
B) ​photosystem II only 
C) ​photosystem I only 
D) ​ß-carotene 
E) ​ATP synthase

Question 16

What are the products of the light-dependent reactions of photosynthesis?

Accepted Answer

A) ADP, NADP+, and sugars 
B) ADP, NADP+, and O2 
C) ATP, NADPH and O2 
D) ATP, NADPH, and CO2 
E) ATP, NADPH, and sugars 
A) ADP, NADP+, and sugars 
B) ADP, NADP+, and O2 
C) ATP, NADPH and O2 
D) ATP, NADPH, and CO2 
E) ATP, NADPH, and sugars

Question 17

​Under intense sunlight, ____.

Accepted Answer

A) ​the noncyclic pathway produces excess ATP 
B) ​the noncyclic pathway stalls and the cyclic pathway provides extra ATP 
C) ​excess free radicals are used to generate ATP for sugar production 
D) ​the noncyclic pathway becomes dominant as photosystem II stops releasing electrons 
E) ​carbon fixation ceases and leaf cells become dormant 
A) ​the noncyclic pathway produces excess ATP 
B) ​the noncyclic pathway stalls and the cyclic pathway provides extra ATP 
C) ​excess free radicals are used to generate ATP for sugar production 
D) ​the noncyclic pathway becomes dominant as photosystem II stops releasing electrons 
E) ​carbon fixation ceases and leaf cells become dormant

Question 18

How do C4 and CAM plants survive under dry conditions?

Accepted Answer

When plants close their stomata on hot,

Question 19

The enzyme rubisco fixes carbon by attaching CO2 to ____.

Accepted Answer

A) phosphoglycerate (PG
A)  
B) ribulose bisphosphate (RuBP) 
C) phosphoglyceraldehyde (PGAL) 
D) glucose 
E) oxaloacetate 
A) phosphoglycerate (PG
A)  
B) ribulose bisphosphate (RuBP) 
C) phosphoglyceraldehyde (PGAL) 
D) glucose 
E) oxaloacetate

Question 20

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once.
-electron transport chain

Accepted Answer

A) thylakoid membrane 
B) stroma 
C) thylakoid compartment 
A) thylakoid membrane 
B) stroma 
C) thylakoid compartment

Exam 6: Where It Starts-Photosynthesis

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -​photosystems I and II

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -​ATP synthase

Twelve PGAL molecules form when six carbon dioxide molecules are attached to six RuBP molecules. Only two of these PGAL molecules are needed to form a 6-carbon sugar. What is the fate of the 10 remaining PGAL molecules?

Why is rubisco the most abundant protein on Earth?​

Why do the cells of photosynthetic organisms contain accessory pigments?

​Why is photorespiration an inefficient way to produce sugars?

-In the accompanying figure, what does letter E represent?

Four of the five items listed below participate in photosynthesis. Select the exception.

Match the process to the correct description. -PGA to PGAL conversion

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -accumulation of hydrogen ions

What do photosynthetic autotrophs use as a carbon source? What do they use as an energy source?

Match the description to the correct photosynthetic pathway. -This process involves a photolysis step, breaking water into hydrogen ions and oxygen.

-According to the accompanying diagram, where are hydrogen ions sequestered?

The cyclic pathway of light-dependent reactions uses ____ to absorb light energy and emit electrons.​

What are the products of the light-dependent reactions of photosynthesis?

​Under intense sunlight, ____.

How do C4 and CAM plants survive under dry conditions?

The enzyme rubisco fixes carbon by attaching CO2 to ____.

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -electron transport chain

The Science of Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Releasing Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Patterns in Inherited Traits

Human Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Lifes Origin and Early Evolution

Viruses, Bacteria, and Archaea

The Protists

Plant Evolution

Fungi

Animals I: Major Invertebrate Groups

Animals Ii: the Chordates

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Reproduction and Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Effects on the Biosphere

Filters

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -photosystems I and II

Match each process or structure with its correct location within the chloroplast. Some choices may be used more than once. -ATP synthase

Why is rubisco the most abundant protein on Earth?

Why is photorespiration an inefficient way to produce sugars?

The cyclic pathway of light-dependent reactions uses ____ to absorb light energy and emit electrons.

Under intense sunlight, ____.

The enzyme rubisco fixes carbon by attaching CO₂ to ____.