Question 1

Photoheterotrophs are best described as organisms that obtain energy to make ATP

Accepted Answer

A)  from organic compounds but use sunlight to produce carbon sources.
B)  and organic compounds from sunlight.
C)  from sunlight but cannot make organic compounds from CO2.
D)  from NADH.
E)  from organic compounds.

Question 2

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the form of ________ and ________.

Accepted Answer

The answer of The energy transduction reactions of photosynthesis convert...

Question 3

Which of the following initially traps solar energy in the process of photosynthesis?

Accepted Answer

A)  water
B)  chlorophyll
C)  triose phosphate
D)  NADP+
E)  ATP

Question 4

In a chloroplast,the stroma is

Accepted Answer

A)  a pore in the outer membrane.
B)  a stack of thylakoids.
C)  the region between in the inner and outer membranes.
D)  a connection between the grana.
E)  a gel-like matrix between the inner chloroplast membrane and the thylakoid membrane.

Question 5

________ organisms such as green and purple bacteria derive electrons from sulfide,thiosulfate,and succinate to generate NADPH.

Accepted Answer

Anoxygenic...

Question 6

Based on the comparisons of anoxygenic and oxygenic photosynthesis,the entry of oxygen into the atmosphere is most directly attributed to

Accepted Answer

A)  PSI activity.
B)  Calvin cycle activity.
C)  photophosphorylation.
D)  Hatch-Slack pathway activity.
E)  Q cycle activity.

Question 7

Each of the following statements accurately describes the Calvin cycle except

Accepted Answer

A)  It is found in all oxygenic and most anoxygenic phototrophs.
B)  Carbon dioxide is fixed by reduction to form organic sugars.
C)  Its products enter a variety of metabolic pathways including sugar and starch biosynthesis.
D)  It involves ribulose-1,5-bisphosphate (RuBP) .
E)  It is confined to the cytoplasm in plants and algae.

Question 8

The ATP synthase complex associated with the thylakoid membrane

Accepted Answer

A)  contains a CF1 proton channel and a CFo ATPase complex.
B)  is identical to the FoF1 complex of mitochondria.
C)  performs photophosphorylation in oxygenic phototrophs.
D)  is a soluble enzyme complex peripherally associated with PSI.
E)  accepts electrons from PSI.

Question 9

Some herbicides,such as paraquat,cause oxidation of NADPH to NADP+.How does paraquat interfere with plant energy metabolism?

Accepted Answer

By oxidizing NADPH to NADP dir...

Question 10

Each of the following can be used in the Calvin cycle except

Accepted Answer

A)  phosphoglycolate.
B)  NADPH.
C)  3-phosphoglycerate.
D)  CO2.
E)  ribulose-1,5-bisphosphate.

Question 11

In crassulacean acid metabolism (CAM) plants

Accepted Answer

A)  stomata open during the day.
B)  malate is stored in large vacuoles.
C)  CO2 is transported directly into mesophyll cells.
D)  the amount of carbon assimilated for each water molecule transpired is only 25 percent of that in C3 plants.
E)  carboxylation and decarboxylation reactions occur in the same location at the same time.

Question 12

Which of the following types of organisms makes use of the Hatch-Slack cycle?

Accepted Answer

A)  algae
B)  C3 plants
C)  C4 plants
D)  cyanobacteria
E)  photosynthetic bacteria

Question 13

The light-dependent generation of NADPH is referred to as ________.

Accepted Answer

The answer of The light-dependent generation of NADPH is referred...

Question 14

When a photon is absorbed by a pigment (light-absorbing molecule) ,such as chlorophyll,the energy of the photon is transferred to

Accepted Answer

A)  D1 protein to activate PSII.
B)  ATP synthase to make ATP.
C)  an electron to move it from a low to a high energy orbital.
D)  Plastocyanin to be passed on to PSI.
E)  NADP+ to make NADPH.

Question 15

Plastocyanin (PC)is a copper-containing protein that,like plastoquinol,is a mobile ________ carrier in photosynthesis.

Accepted Answer

The answer of Plastocyanin (PC)is a copper-containing protein that,like plastoquinol,is...

Question 16

Chlorophyll is comprised of a central ________ containing a(n)________ ion and a(n)________ side chain.

Accepted Answer

porphyrin ...

Question 17

When atmospheric CO2 concentrations decrease,the ________ cycle gives C4 plants an advantage over C3 in carbon fixation.

Accepted Answer

Question 18

There has been and remains great interest in developing safe and effective herbicides.In some situations,it would be desirable to have a herbicide that killed a wide variety of different plants,but in other cases it would be best to have a herbicide that was much more selective.
a)What plant activity would you target to kill the widest variety of plants?
b)What plant activity would you target to kill C4 plants?
c)What plant activity would you target to kill CAM plants?
Be as specific as possible.

Accepted Answer

a)The best general herbicide would targe...

Question 19

The Emerson enhancement effect

Accepted Answer

A)  explains the lack of O2 release during anoxygenic photosynthesis.
B)  results from the activity of three photosystems.
C)  explains the synergistic effect of two wavelengths of light on photosynthesis.
D)  makes it possible for plants to avoid the glyoxylate pathway.
E)  accounts for the major difference between C3 and C4 plants.

Question 20

Your house plant is growing slowly and lacks its normal bright green color,so you call a botanist for advice.She suggests that the plant may be deficient in magnesium (Mg2+) .Why are these symptoms associated with Mg2+ deficiency?

Accepted Answer

A)  Mg2+ is important in the structure of many amino acids.
B)  Lack of Mg2+ in the soil allows pathogenic bacteria to grow.
C)  Mg2+ is a cofactor for NADPH function.
D)  Mg2+ is an important component in chlorophyll.
E)  Cytochromes require Mg2+ to function properly.

Exam 11: Phototrophic Energy Metabolism: Photosynthesis

When atmospheric CO₂ concentrations decrease,the ________ cycle gives C₄ plants an advantage over C₃ in carbon fixation.

Correct Answer
verified

Each of the following can be used in the Calvin cycle except

Correct Answer
verified

In crassulacean acid metabolism (CAM) plants

Correct Answer
verified

Some herbicides,such as paraquat,cause oxidation of NADPH to NADP⁺.How does paraquat interfere with plant energy metabolism?

Correct Answer
verified
By oxidizing NADPH to NADP dir...
View Answer

In a chloroplast,the stroma is

Correct Answer
verified

Which of the following initially traps solar energy in the process of photosynthesis?

Correct Answer
verified

The ATP synthase complex associated with the thylakoid membrane

Correct Answer
verified

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the form of and .

Correct Answer
verified

Each of the following statements accurately describes the Calvin cycle except

Correct Answer
verified

The Emerson enhancement effect

Correct Answer
verified

Based on the comparisons of anoxygenic and oxygenic photosynthesis,the entry of oxygen into the atmosphere is most directly attributed to

Correct Answer
verified

Your house plant is growing slowly and lacks its normal bright green color,so you call a botanist for advice.She suggests that the plant may be deficient in magnesium (Mg²⁺) .Why are these symptoms associated with Mg²⁺ deficiency?

Correct Answer
verified

When a photon is absorbed by a pigment (light-absorbing molecule) ,such as chlorophyll,the energy of the photon is transferred to

Correct Answer
verified

Photoheterotrophs are best described as organisms that obtain energy to make ATP

Correct Answer
verified

Plastocyanin (PC)is a copper-containing protein that,like plastoquinol,is a mobile ________ carrier in photosynthesis.

Correct Answer
verified

Correct Answer
verified
a)The best general herbicide would targe...
View Answer

________ organisms such as green and purple bacteria derive electrons from sulfide,thiosulfate,and succinate to generate NADPH.

Correct Answer
verified
Anoxygenic...
View Answer

Which of the following types of organisms makes use of the Hatch-Slack cycle?

Correct Answer
verified

The light-dependent generation of NADPH is referred to as ________.

Correct Answer
verified

Chlorophyll is comprised of a central containing a(n) ion and a(n) side chain.

Correct Answer
verified
porphyrin ...
View Answer

Exam 11: Phototrophic Energy Metabolism: Photosynthesis

When atmospheric CO2 concentrations decrease,the ________ cycle gives C4 plants an advantage over C3 in carbon fixation.

Correct AnswerverifiedShow Answer

Each of the following can be used in the Calvin cycle except

Correct AnswerverifiedShow Answer

In crassulacean acid metabolism (CAM) plants

Correct AnswerverifiedShow Answer

Some herbicides,such as paraquat,cause oxidation of NADPH to NADP+.How does paraquat interfere with plant energy metabolism?

Correct AnswerverifiedBy oxidizing NADPH to NADP dir...View AnswerShow Answer

In a chloroplast,the stroma is

Correct AnswerverifiedShow Answer

Which of the following initially traps solar energy in the process of photosynthesis?

Correct AnswerverifiedShow Answer

The ATP synthase complex associated with the thylakoid membrane

Correct AnswerverifiedShow Answer

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the form of ________ and ________.

Correct AnswerverifiedShow Answer

Each of the following statements accurately describes the Calvin cycle except

Correct AnswerverifiedShow Answer

The Emerson enhancement effect

Correct AnswerverifiedShow Answer

Based on the comparisons of anoxygenic and oxygenic photosynthesis,the entry of oxygen into the atmosphere is most directly attributed to

Correct AnswerverifiedShow Answer

Your house plant is growing slowly and lacks its normal bright green color,so you call a botanist for advice.She suggests that the plant may be deficient in magnesium (Mg2+) .Why are these symptoms associated with Mg2+ deficiency?

Correct AnswerverifiedShow Answer

When a photon is absorbed by a pigment (light-absorbing molecule) ,such as chlorophyll,the energy of the photon is transferred to

Correct AnswerverifiedShow Answer

Photoheterotrophs are best described as organisms that obtain energy to make ATP

Correct AnswerverifiedShow Answer

Plastocyanin (PC)is a copper-containing protein that,like plastoquinol,is a mobile ________ carrier in photosynthesis.

Correct AnswerverifiedShow Answer

Correct Answerverifieda)The best general herbicide would targe...View AnswerShow Answer

________ organisms such as green and purple bacteria derive electrons from sulfide,thiosulfate,and succinate to generate NADPH.

Correct AnswerverifiedAnoxygenic...View AnswerShow Answer

Which of the following types of organisms makes use of the Hatch-Slack cycle?

Correct AnswerverifiedShow Answer

The light-dependent generation of NADPH is referred to as ________.

Correct AnswerverifiedShow Answer

Chlorophyll is comprised of a central ________ containing a(n)________ ion and a(n)________ side chain.

Correct Answerverifiedporphyrin ...View AnswerShow Answer

When atmospheric CO₂ concentrations decrease,the ________ cycle gives C₄ plants an advantage over C₃ in carbon fixation.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Some herbicides,such as paraquat,cause oxidation of NADPH to NADP⁺.How does paraquat interfere with plant energy metabolism?

Correct Answer
verified
By oxidizing NADPH to NADP dir...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the form of and .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Your house plant is growing slowly and lacks its normal bright green color,so you call a botanist for advice.She suggests that the plant may be deficient in magnesium (Mg²⁺) .Why are these symptoms associated with Mg²⁺ deficiency?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a)The best general herbicide would targe...
View Answer

Correct Answer
verified
Anoxygenic...
View Answer

Correct Answer
verified

Correct Answer
verified

Chlorophyll is comprised of a central containing a(n) ion and a(n) side chain.

Correct Answer
verified
porphyrin ...
View Answer