Question 1

Organisms that gain energy by consuming preexisting organic molecules are called

Accepted Answer

A)  heterotrophs.
B)  autotrophs.
C)  animorphs.
D)  plants.
E)  None of the answers are correct.F) D) and E)
G) C) and D)

Question 2

In the section "Investigating Life: Solar-Powered Sea Slugs",the sea slug Elysia chlorotica absorbs chloroplasts as it digests algae.This allows the sea slug to live on sunlight and carbon dioxide and suggests that

Accepted Answer

A)  photosynthesis can occur from proteins released from a digested chloroplast.
B)  regions of a plant outside of the chloroplast are necessary for photosynthesis.
C)  chloroplasts alone are sufficient for photosynthesis.
D)  some of the algae are not digested and are living symbiotically inside of the sea slugs.
E)  photosynthesis can occur outside of a chloroplast in algaE.F) None of the above
G) A) and C)

Question 3

How do C4 plants minimize photorespiration?

Accepted Answer

A)  Stomata are open only at night and oxygen is stored in a four-carbon compound.
B)  The light reactions and carbon reactions occur in different cells,so carbon dioxide does not come into contact with rubisco.
C)  Stomata are open only at night and carbon dioxide is stored in a four-carbon compound.
D)  The light reactions and carbon reactions occur in different cells,so oxygen does not come into contact with rubisco.E) B) and C)
F) None of the above

Question 4

When chlorophyll a absorbs light,electrons are "excited" and ejected from the chlorophyll a molecule.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following organelles are found in plants?
____ Plants have chloroplasts for photosynthesis.
____ Plants have mitochondria for cellular respiration.
_____ Plants have cell walls for cellular respiration.
_____ Plants have mitochondria for photosynthesis.

Accepted Answer

__X__ Plants have chloroplasts for photo...

Question 6

Grana,thylakoids,and chloroplasts are cellular structures used in photosynthesis.

Accepted Answer

A) True 
 B)False

Question 7

The epidermis,or outer layer,of leaves is transparent.How is the transparency beneficial to photosynthesis?

Accepted Answer

A)  It allows wavelengths of light to reach the mesophyll.
B)  It prevents water loss.
C)  It absorbs water.
D)  It maintains open stomata.
E)  It maintains closed stomata.F) All of the above
G) A) and B)

Question 8

The carbon reactions of photosynthesis can occur in the day or night.

Accepted Answer

A) True 
 B)False

Question 9

Although the plants are living,why CANNOT plants grow in the dark?

Accepted Answer

A)  Plants require light to produce food.
B)  Plants can grow in the dark.
C)  Plants require light for cellular respiration.
D)  Plants require light to make carbon dioxide.E) B) and C)
F) B) and D)

Question 10

Which plants keep their stomata open only at night?

Accepted Answer

A)  CAM
B)  C3
C)  C4
D)  No plants keep their stomata open only at nightE) A) and B)
F) None of the above

Question 11

Leaves of many plants change colors in the fall because

Accepted Answer

A)  the cooler weather causes plants to produce more of the accessory photosynthetic pigments.
B)  chlorophyll in the leaves degrades with shorter days and cooler temperatures.
C)  the decrease in daylight hours causes the plant to produce more of the accessory photosynthetic pigments.
D)  plants produce more chlorophyll.
E)  All answers are correct.F) A) and B)
G) A) and C)

Question 12

Energy is carried from the light reactions to the carbon reactions by __________.

Accepted Answer

A)  water
B)  PGAL
C)  NADP+
D)  oxygen
E)  ATP and NADPHF) A) and C)
G) A) and B)

Question 13

The energy source for the light reactions is _____;the energy source for the carbon reactions is ______.

Accepted Answer

A)  ATP,carbon dioxide
B)  sunlight,carbon dioxide
C)  sunlight,ATP
D)  ATP,oxygen
E)  Sunlight serves as the energy source for both sets of photosynthetic reactions.F) A) and B)
G) D) and E)

Question 14

Tiny openings in the epidermis of the leaf that allow air to enter into the leaf are called

Accepted Answer

A)  thylakoids.
B)  stroma.
C)  stomata.
D)  grana.
E)  thylakoid spaces.F) B) and D)
G) C) and E)

Question 15

The reactions of photosynthesis are summarized as

Accepted Answer

A)  6CO2 + 6H2O →C6H12O6 + 6O2.
B)  6CO + 6H2O →C6H12O6 + 6H2O.
C)  12CO2 + 6H2O →C12H12O6 + 6H2O.
D)  6CO + 6H2O →C6H12O?6 + 6O2.
E)  None of the answers are correct.F) C) and E)
G) All of the above

Question 16

Herbicides may kill plants by

Accepted Answer

A)  blocking carotenoid synthesis.
B)  blocking electron flow in photosystem II.
C)  diverting electrons away from photosystem I.
D)  All answers are correctE) B) and C)
F) A) and D)

Question 17

Place the steps of the light reactions in the order in which they occur.
Energy is passed to the reaction center of photosystem II.
Excited electrons are passed through electron transport chain,producing NADPH.
A pair of electrons is excited in the reaction center of photosystem II.
Excited electrons are passed through electron transport chain,producing ATP.
Photosystem II captures a photon of light.

Accepted Answer

2 Energy is passed to the reaction cente...

Question 18

How would Earth be different without photosynthesis?

Accepted Answer

A)  The amount of oxygen in the atmosphere would be lower.
B)  Heterotrophs would have few food sources.
C)  Autotrophs would reply on other chemical mechanisms to make carbohydrates.
D)  More sunlight would be absorbed and converted to environmental heat.
E)  All answers are correct.F) B) and E)
G) B) and D)

Exam 5: Photosynthesis

Leaves of many plants change colors in the fall because

Correct Answer
verified

The reactions of photosynthesis are summarized as

Correct Answer
verified

Although the plants are living,why CANNOT plants grow in the dark?

Correct Answer
verified

Tiny openings in the epidermis of the leaf that allow air to enter into the leaf are called

Correct Answer
verified

The epidermis,or outer layer,of leaves is transparent.How is the transparency beneficial to photosynthesis?

Correct Answer
verified

In the section "Investigating Life: Solar-Powered Sea Slugs",the sea slug Elysia chlorotica absorbs chloroplasts as it digests algae.This allows the sea slug to live on sunlight and carbon dioxide and suggests that

Correct Answer
verified

Energy is carried from the light reactions to the carbon reactions by __________.

Correct Answer
verified

Which of the following organelles are found in plants? __ Plants have chloroplasts for photosynthesis. Plants have mitochondria for cellular respiration. _ Plants have cell walls for cellular respiration. ___ Plants have mitochondria for photosynthesis.

Correct Answer
verified
X Plants have chloroplasts for photo...
View Answer

The energy source for the light reactions is _;the energy source for the carbon reactions is __.

Correct Answer
verified

Organisms that gain energy by consuming preexisting organic molecules are called

Correct Answer
verified

Which plants keep their stomata open only at night?

Correct Answer
verified

Herbicides may kill plants by

Correct Answer
verified

When chlorophyll a absorbs light,electrons are "excited" and ejected from the chlorophyll a molecule.

Correct Answer
verified

Grana,thylakoids,and chloroplasts are cellular structures used in photosynthesis.

Correct Answer
verified

How would Earth be different without photosynthesis?

Correct Answer
verified

How do C₄ plants minimize photorespiration?

Correct Answer
verified

Correct Answer
verified
2 Energy is passed to the reaction cente...
View Answer

The carbon reactions of photosynthesis can occur in the day or night.

Correct Answer
verified

Exam 5: Photosynthesis

Leaves of many plants change colors in the fall because

Correct AnswerverifiedShow Answer

The reactions of photosynthesis are summarized as

Correct AnswerverifiedShow Answer

Although the plants are living,why CANNOT plants grow in the dark?

Correct AnswerverifiedShow Answer

Tiny openings in the epidermis of the leaf that allow air to enter into the leaf are called

Correct AnswerverifiedShow Answer

The epidermis,or outer layer,of leaves is transparent.How is the transparency beneficial to photosynthesis?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Solar-Powered Sea Slugs",the sea slug Elysia chlorotica absorbs chloroplasts as it digests algae.This allows the sea slug to live on sunlight and carbon dioxide and suggests that

Correct AnswerverifiedShow Answer

Energy is carried from the light reactions to the carbon reactions by __________.

Correct AnswerverifiedShow Answer

Which of the following organelles are found in plants? ____ Plants have chloroplasts for photosynthesis. ____ Plants have mitochondria for cellular respiration. _____ Plants have cell walls for cellular respiration. _____ Plants have mitochondria for photosynthesis.

Correct Answerverified__X__ Plants have chloroplasts for photo...View AnswerShow Answer

The energy source for the light reactions is _____;the energy source for the carbon reactions is ______.

Correct AnswerverifiedShow Answer

Organisms that gain energy by consuming preexisting organic molecules are called

Correct AnswerverifiedShow Answer

Which plants keep their stomata open only at night?

Correct AnswerverifiedShow Answer

Herbicides may kill plants by

Correct AnswerverifiedShow Answer

When chlorophyll a absorbs light,electrons are "excited" and ejected from the chlorophyll a molecule.

Correct AnswerverifiedShow Answer

Grana,thylakoids,and chloroplasts are cellular structures used in photosynthesis.

Correct AnswerverifiedShow Answer

How would Earth be different without photosynthesis?

Correct AnswerverifiedShow Answer

How do C4 plants minimize photorespiration?

Correct AnswerverifiedShow Answer

Correct Answerverified2 Energy is passed to the reaction cente...View AnswerShow Answer

The carbon reactions of photosynthesis can occur in the day or night.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following organelles are found in plants? __ Plants have chloroplasts for photosynthesis. Plants have mitochondria for cellular respiration. _ Plants have cell walls for cellular respiration. ___ Plants have mitochondria for photosynthesis.

Correct Answer
verified
X Plants have chloroplasts for photo...
View Answer

The energy source for the light reactions is _;the energy source for the carbon reactions is __.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How do C₄ plants minimize photorespiration?

Correct Answer
verified

Correct Answer
verified
2 Energy is passed to the reaction cente...
View Answer

Correct Answer
verified