Deck 6: Where It Startsphotosynthesis

Question 1

Which of the following statements is NOT TRUE concerning an electron that has absorbed a photon?

A) It moves to a higher energy level.
B) It becomes more stable.
C) It quickly returns to its original energy level.
D) It may emit energy.
E) It becomes excited.

Answer 1

B

Question 2

Actual assembly of sugars during photosynthesis

A) occurs during light-independent reactions.
B) takes place in the stroma.
C) requires NADPH.
D) requires ATP.
E) does all of these.

Answer 2

E

Question 3

Which of the following is not a product of the light-independent reactions?

A) ADP.
B) NADP+.
C) oxygen.
D) glucose.
E) all these are products.

Answer 3

C

Question 4

Where are sugars formed in the chloroplasts?

A) on the outer membrane
B) on the inner membrane
C) in the thylakoid compartment
D) in the stroma
E) within the thylakoid membrane

Question 5

Which of the following statements is NOT TRUE?

A) Photons are packages of solar energy.
B) Each photon consists of a fixed amount of energy.
C) The least energetic photons travel in longer wavelengths.
D) Photons with different energy levels are perceived as exhibiting different colors.
E) Photons of visible light have wavelengths shorter than 350 nanometers.

Question 6

A pigment absorbs a photon if the energy of the photon is

A) exactly enough to boost an electron of the pigment to a higher energy level.
B) slightly more than the energy of the electron absorbing the photon.
C) significantly more than the energy of the electron absorbing the photon.
D) exactly twice the energy of the electron absorbing the photon.
E) any of these, depending on the type of pigment.

Question 7

Where in a plant cell are chloroplasts found?

A) on the cell membrane
B) in the cytoplasm of the cell
C) in the stroma
D) in the thylakoids
E) none of these

Question 8

Plants are considered to be:

A) heterotrophs.
B) chemotrophs.
C) carbotrophs.
D) autotrophs.
E) a combination of all of these.

Question 9

Which of the following statements is TRUE about NADPH?

A) It is an enzyme.
B) It is the oxidized form of NADP⁺.
C) It is generated n the light-dependent reactions of photosynthesis.
D) It accepts hydrogen and electrons from carbohydrates.
E) It obtains energy from ATP.

Question 10

The best light to grow the alga in is ____, according to the figure.

A) blue-violet
B) blue-green
C) green-yellow
D) yellow-orange
E) orange-red

Question 11

The following questions refer to the figure above illustrating the results from Engelmann's investigation.
Engelmann's experiment was designed to determine

A) what wavelengths comprise visible light.
B) what colors are contained in visible light.
C) if bacteria are attracted to oxygen.
D) if photosynthesis releases oxygen.
E) none of these.

Question 12

Which of the following is not produced in the light dependent reactions?

A) glucose.
B) oxygen.
C) ATP.
D) NADPH.
E) all of these are produced.

Question 13

Ethanol can be easily produced from:

A) photosynthetic pigments.
B) crystalline cellulose.
C) root systems of plants.
D) plant sugars.
E) all of these.

Question 14

Chlorophyll does not absorb which color of light?

A) red
B) yellow
C) orange
D) green
E) blue

Question 15

Which of the following statements is NOT TRUE concerning photosynthetic plants?

A) They get carbon from the environment.
B) They obtain energy from the environment.
C) They make their own food.
D) They provide food for others.
E) They do not need gases to make food.

Question 16

Which of the following statements is(are) generally TRUE of pigments?

A) They absorb some photons.
B) They reflect all photons.
C) They absorb photons of all colors.
D) They absorb photons of all wavelengths.
E) They do all of these.

Question 17

Which of the following are accessory pigments in photosynthesis?

A) carotenoids
B) phycobillins
C) anthocyanins
D) chlorophyll b
E) all of these

Question 18

Which of the following statements about the electromagnetic spectrum is true?

A) Infrared energy is sufficient to produce ionization.
B) Infrared radiation has more energy than red radiation.
C) Visible light has more energy than ultraviolet radiation.
D) Chlorophyll absorbs some visible wavelengths, but not all.
E) Chloroplasts absorb all wavelengths of visible light equally.

Question 19

The oxygen released in photosynthesis comes from

A) carbon dioxide.
B) glucose.
C) ribulose bisphosphate.
D) water.
E) atmospheric oxygen.

Question 20

According to the figure, the most effective wavelength for photosynthesis occurs in the algae that are at ____ nanometers.

A) 680
B) 700
C) 400
D) 425
E) 550

Question 21

Which of the following has the most energy?

A) phosphoglycerate (PGA)
B) ribulose bisphosphate (RuBP)
C) phosphoglyceraldehyde (PGAL)
D) glucose
E) rubisco

Question 22

Which of the following chemicals has five carbon atoms?

A) phosphoglycerate (PGA)
B) ribulose bisphosphate (RuBP)
C) phosphoglyceraldehyde (PGAL)
D) glucose
E) none of these

Question 23

MATCHING
Matching.Choose the one most appropriate description.
a.uses ribulose bisphosphate; produces PGA
b.uses ATP and NADPH
c.uses two PGAL
d.produces ATP and NADPH
e.uses an electron transfer chain to produce ATP
noncyclic pathway of ATP formation

Question 24

Which of the following is NOT TRUE of photolysis?

A) It is a function of the cyclic pathway.
B) It involves photosystem II.
C) It occurs in the light-dependent reactions.
D) It is the source of oxygen in photosynthesis.
E) It directly replaces electrons lost by p680.

Question 25

Which of the following statements describes an electron transfer chain?

A) It generates energy from carbohydrates.
B) Cells use it to dispose of excess electrons.
C) It utilizes ATP to synthesize nutrients.
D) It transfers energy, stepwise, from one compound to another.
E) It requires activation by oxygen.

Question 26

MATCHING
Matching.Choose the one most appropriate description.
a.uses ribulose bisphosphate; produces PGA
b.uses ATP and NADPH
c.uses two PGAL
d.produces ATP and NADPH
e.uses an electron transfer chain to produce ATP
cyclic pathway of ATP formation

Question 27

Which of the following is NOT produced in the synthesis (light-independent) reactions?

A) NADPH
B) phosphoglyceric acid (PGA)
C) phosphoglyceraldehyde (PGAL)
D) glucose
E) ribulose bisphosphate

Question 28

The two photosystems of light reactions are designated

A) type 1 and type 2.
B) type I and type II.
C) photosystem A and photosystem B.
D) photosystem 680 and photosystem 700.
E) photosystem I and photosystem II.

Question 29

Which of the following is TRUE concerning the C4 pathway?

A) It produces large amounts of carbohydrates.
B) It feeds into the C3 pathway.
C) It is the mechanism of photorespiration.
D) It involves the activity of rubisco.
E) All of these are true.

Question 30

Plant cells release hydrogen ions and oxygen from H₂O molecules in

A) photosystem I.
B) photosystem II.
C) cyclic photophosphorylation.
D) the light independent reaction.
E) carbon fixation

Question 31

A high concentration of H⁺ in the thylakoid compartment provides potential energy for the ____ by____.

A) breakdown of water; oxidation
B) production of ATP; ATP synthesis
C) reduction of NADP⁺; an electron transfer chain
D) production of sugars; the light-independent reactions
E) production of O₂; photolysis

Question 32

The light-independent reactions of photosynthesis

A) fix carbon dioxide.
B) release oxygen.
C) cannot occur in light.
D) generate ATP.
E) do all of these.

Question 33

All, EXCEPT which of the following, are present in both the light-dependent and light-independent reactions?

A) ATP
B) NADPH
C) ADP
D) rubisco
E) NADP⁺

Question 34

With regard to photosynthesis, photorespiration

A) is more efficient in producing carbohydrates.
B) predominates in C3 plants in cool weather when water is plentiful.
C) predominates in C4 plants on hot days.
D) produces the same amount of PGA.
E) does none of these.

Question 35

All of the products of the light-dependent reactions of photosynthesis listed below are used in the light-independent reactions EXCEPT for

A) O₂.
B) electrons.
C) NADPH.
D) ATP.
E) hydrogen protons contributed by NADPH.

Question 36

The first stable compound produced from CO₂ in the light-independent reaction is

A) phosphoglycerate (PGA).
B) ribulose bisphosphate (RuBP).
C) phosphoglyceraldehyde (PGAL).
D) O₂.
E) NADP⁺.

Question 37

MATCHING
Matching.Choose the one most appropriate description.
a.uses ribulose bisphosphate; produces PGA
b.uses ATP and NADPH
c.uses two PGAL
d.produces ATP and NADPH
e.uses an electron transfer chain to produce ATP
carbon dioxide fixation

Question 38

Which of the following is formed last in the transfer of solar energy?

A) H⁺
B) excited electrons
C) ATP
D) O₂
E) NADPH

Question 39

The proteins associated with the light-dependent reactions of photosynthesis are located

A) on the outer membranes of the chloroplast.
B) in the stroma.
C) on the thylakoid membrane.
D) throughout the cytoplasm of plant cells.
E) in the thylakoid compartment.

Question 40

The CAM pathway

A) involves only the Calvin-Benson cycle
B) involves only the C4 cycle
C) is used by plants in humid regions
D) is also known as photorespiration
E) needs day and night for completion

Question 41

Classification.The processes listed below represent major chemical pathways in photosynthesis.Respond to the following statements with reference to these five processes.
a.light-dependent reactions
b.chemosynthetic reactions
c.carbon dioxide fixation
d.Calvin-Benson cycle
e.C4 pathway
In this process carbon dioxide is incorporated first into an unstable intermediate compound and then into phosphoglycerate.

Question 42

MATCHING
Matching.Choose the one most appropriate description.
a.uses ribulose bisphosphate; produces PGA
b.uses ATP and NADPH
c.uses two PGAL
d.produces ATP and NADPH
e.uses an electron transfer chain to produce ATP
the formation of glucose

Question 43

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
Oxygen is produced by this process.

Question 44

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
This process releases electrons to fill "holes" in chlorophyll in noncyclic ATP formation.

Question 45

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
When light energy is absorbed by a leaf, the first result will be this.

Question 46

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
A trip to space finds a planet rich with green light.Scientists hope to introduce photosynthetic organsims to this planet.What sort of organism should they choose?

Question 47

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
High-energy phosphate bonds are formed during this process.

Question 48

Classification.The processes listed below represent major chemical pathways in photosynthesis.Respond to the following statements with reference to these five processes.
a.light-dependent reactions
b.chemosynthetic reactions
c.carbon dioxide fixation
d.Calvin-Benson cycle
e.C4 pathway
This yields NADPH as well as ATP.

Question 49

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
Consider the Calvin-Benson cycle and the noncyclic photosynthetic pathway.Why is the cyclic pathway so important?

Question 50

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
The final step that occurs during noncyclic ATP formation is this.

Question 51

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
Both C4 and CAM plants have modified carbon fixation - how do they each do carbon fixation and what is the benefit of each of these types of carbon fixation?

Question 52

Classification.The processes listed below represent major chemical pathways in photosynthesis.Respond to the following statements with reference to these five processes.
a.light-dependent reactions
b.chemosynthetic reactions
c.carbon dioxide fixation
d.Calvin-Benson cycle
e.C4 pathway
This leads to the formation of a glucose-6-phosphate from two molecules of phosphoglyceraldehyde.

Question 53

Classification.The processes listed below represent major chemical pathways in photosynthesis.Respond to the following statements with reference to these five processes.
a.light-dependent reactions
b.chemosynthetic reactions
c.carbon dioxide fixation
d.Calvin-Benson cycle
e.C4 pathway
PGAL molecules are formed from the reaction of PGA molecules with ATP and NADPH in this pathway.

Question 54

MATCHING
Matching.Choose the one most appropriate description.
a.uses ribulose bisphosphate; produces PGA
b.uses ATP and NADPH
c.uses two PGAL
d.produces ATP and NADPH
e.uses an electron transfer chain to produce ATP
the PGA to PGAL conversion

Question 55

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
The splitting of water produces three products.Name and discuss the role of each.

Question 56

Classification.The processes listed below represent major chemical pathways in photosynthesis.Respond to the following statements with reference to these five processes.
a.light-dependent reactions
b.chemosynthetic reactions
c.carbon dioxide fixation
d.Calvin-Benson cycle
e.C4 pathway
This is a carbon-fixing system that precedes the Calvin-Benson cycle in some plants.

Question 57

Classification.The five reactions listed below occur during the noncyclic pathway of ATP formation.Use them to respond to the following statements.
a.reduction of NADP⁺
b.phosphorylation of ADP
c.photolysis of water
d.oxidation of chlorophyll
e.reduction of chlorophyll
Any light-driven reaction that attaches phosphate to a molecule is called __________.