Question 1

Draw the reaction that corresponds to the energy transfer between an excited chlorophyll molecule and its neighbor.

Accepted Answer

Chl₁* + Chl₂ @#IMG-DLM&_TB6697_1

Question 2

Which of the following is true of the glyoxylate cycle?

Accepted Answer

A)  It allows plants to produce glucose from fats and two-carbon molecules like acetate. 
B)  It occurs in plant cells as an alternative to photosynthesis. 
C)  It bypasses all regulated steps of the TCA cycle. 
D)  It results in a net production of ATP and NADH without proceeding through the TCA cycle. 
A)  It allows plants to produce glucose from fats and two-carbon molecules like acetate. 
B)  It occurs in plant cells as an alternative to photosynthesis. 
C)  It bypasses all regulated steps of the TCA cycle. 
D)  It results in a net production of ATP and NADH without proceeding through the TCA cycle.

Question 3

What is the cellular location of the plant glyoxylate cycle?

Accepted Answer

A)  chloroplast stroma 
B)  cytoplasm 
C)  mitochondria 
D)  glyoxysome 
A)  chloroplast stroma 
B)  cytoplasm 
C)  mitochondria 
D)  glyoxysome

Question 4

Fill in the missing cofactors in the reactions below which correspond to stage 2 of the Calvin cycle reactions.

Accepted Answer

The answer of Fill in the missing cofactors in the...

Question 5

All of the following are true of both chloroplasts and mitochondria EXCEPT that they

Accepted Answer

A)  have one highly folded membrane. 
B)  produce ATP inside the organelle. 
C)  produce NADPH inside the organelle. 
D)  are present in photosynthetic plant cells. 
A)  have one highly folded membrane. 
B)  produce ATP inside the organelle. 
C)  produce NADPH inside the organelle. 
D)  are present in photosynthetic plant cells.

Question 6

Briefly describe the three stages of the Calvin cycle.

Accepted Answer

(1)The enzyme rubisco catalyzes the fixa

Question 7

In addition to the pumping of protons with the photosynthetic electron transport,what else contributes to establishing a proton gradient?

Accepted Answer

A)  the loss of electrons from NADPH 
B)  the reduction of P680+ 
C)  the movement of plastocyanin 
D)  the formation of O2 from two H2O 
A)  the loss of electrons from NADPH 
B)  the reduction of P680+ 
C)  the movement of plastocyanin 
D)  the formation of O2 from two H2O

Question 8

Identify the cell types of cells A and B below,and then identify the plant type in which the cell arrangements are found.

Accepted Answer

A is a mesophyll cel

Question 9

What is the overall balanced reaction for the light reactions of photosynthesis?

Accepted Answer

A)  O2 + 2 NADPH + 3 ATP  2 H2O + 2 NADP+ + 3 ADP + 3Pi 
B)  3 CO2 + 6 NADPH + 9 ATP + 6 H2O  Glyceraldehyde-3-phosphate + 6 NADP+ + 9 ADP + 9 Pi 
C)  O2 + 8 photons + NADP+ + 3 ATP  2 H2O + NADP+ + 3 ADP + 3 Pi 
D)  2 H2O + 8 photons + 2 NADP+ + 3 ADP + 3 Pi  O2 + 2 NADPH + 3 ATP 
A)  O2 + 2 NADPH + 3 ATP  2 H2O + 2 NADP+ + 3 ADP + 3Pi 
B)  3 CO2 + 6 NADPH + 9 ATP + 6 H2O  Glyceraldehyde-3-phosphate + 6 NADP+ + 9 ADP + 9 Pi 
C)  O2 + 8 photons + NADP+ + 3 ATP  2 H2O + NADP+ + 3 ADP + 3 Pi 
D)  2 H2O + 8 photons + 2 NADP+ + 3 ADP + 3 Pi  O2 + 2 NADPH + 3 ATP

Question 10

Label the parts of the chloroplast on the figure below.

Accepted Answer

The answer of Label the parts of the chloroplast on...

Question 11

During photophosphorylation,the protons are pumped into the __________,and the ATP is made in the __________.

Accepted Answer

A)  thylakoid lumen; cytoplasm 
B)  thylakoid lumen; stroma 
C)  stroma; thylakoid lumen 
D)  cytoplasm; stroma 
A)  thylakoid lumen; cytoplasm 
B)  thylakoid lumen; stroma 
C)  stroma; thylakoid lumen 
D)  cytoplasm; stroma

Question 12

The third stage of the three-stage Calvin cycle

Accepted Answer

A)  uses ATP and NADPH from the light reactions. 
B)  generates a glucose molecule for the plant. 
C)  is similar to the reactions found in the glycolysis pathway. 
D)  regenerates a C5 sugar for the Calvin cycle to continue. 
A)  uses ATP and NADPH from the light reactions. 
B)  generates a glucose molecule for the plant. 
C)  is similar to the reactions found in the glycolysis pathway. 
D)  regenerates a C5 sugar for the Calvin cycle to continue.

Question 13

List the four proteins/enzymes and the one molecule involved in the electron transfers in the photosynthetic Z scheme,and show their positions in the "Z" shape.

Accepted Answer

(1)Photosystem 1 (PSI),(2)photosystem II

Question 14

Approximately how many light-harvesting chromophores are found per photosystem enzyme,such as in PSI or PSII?

Accepted Answer

A)  2 
B)  about a dozen 
C)  about 100 to 200 
D)  about 1000 to 2000 
A)  2 
B)  about a dozen 
C)  about 100 to 200 
D)  about 1000 to 2000

Question 15

What group in photosystem II (PSII)directly reacts with H2O during its light-driven oxidation?

Accepted Answer

A)  oxygen evolving center 
B)  P680 
C)  tyrosine 
D)  pheophytin 
A)  oxygen evolving center 
B)  P680 
C)  tyrosine 
D)  pheophytin

Question 16

Why are Calvin cycle reactions also referred to as the dark reactions?

Accepted Answer

A)  They occur primarily at night. 
B)  They absorb, and do not reflect, the sunlight energy. 
C)  They do not absorb sunlight energy. 
D)  They do not require sunlight energy. 
A)  They occur primarily at night. 
B)  They absorb, and do not reflect, the sunlight energy. 
C)  They do not absorb sunlight energy. 
D)  They do not require sunlight energy.

Question 17

Which of the following is an electron transfer molecule in photosynthesis light reactions?

Accepted Answer

A)  plastoquinone 
B)  photon 
C)  paraquat 
D)  ATP 
A)  plastoquinone 
B)  photon 
C)  paraquat 
D)  ATP

Question 18

Where do electrons from photosystem II (PSII)come from to re-reduce the oxidized P680+ state?

Accepted Answer

A)  O2 
B)  NADPH 
C)  plastocyanin 
D)  H2O 
A)  O2 
B)  NADPH 
C)  plastocyanin 
D)  H2O

Question 19

Which of the following groups of molecules are found in the shuffling reactions of stage 3 of photosynthesis?

Accepted Answer

A)  C1, C2, C3, C4, C5, C6, and C7 sugars 
B)  NADPH and ATP 
C)  erythrose-4-phosphate, glyceraldehyde-3-phosphate, and xylulose-5-phosphate 
D)  3-phosphoglycerate, 1,3-bisphosphoglycerate, and glyceraldehyde-3-phosphate 
A)  C1, C2, C3, C4, C5, C6, and C7 sugars 
B)  NADPH and ATP 
C)  erythrose-4-phosphate, glyceraldehyde-3-phosphate, and xylulose-5-phosphate 
D)  3-phosphoglycerate, 1,3-bisphosphoglycerate, and glyceraldehyde-3-phosphate

Question 20

Which protein or enzyme is NOT involved in the cyclic photophosphorylation pathway?

Accepted Answer

A)  ferredoxin 
B)  photosystem II 
C)  cytochrome b6f 
D)  plastocyanin 
A)  ferredoxin 
B)  photosystem II 
C)  cytochrome b6f 
D)  plastocyanin

Exam 12: Photosynthesis

Draw the reaction that corresponds to the energy transfer between an excited chlorophyll molecule and its neighbor.

Which of the following is true of the glyoxylate cycle?

What is the cellular location of the plant glyoxylate cycle?

Fill in the missing cofactors in the reactions below which correspond to stage 2 of the Calvin cycle reactions.

All of the following are true of both chloroplasts and mitochondria EXCEPT that they

Briefly describe the three stages of the Calvin cycle.

In addition to the pumping of protons with the photosynthetic electron transport,what else contributes to establishing a proton gradient?

Identify the cell types of cells A and B below,and then identify the plant type in which the cell arrangements are found.

What is the overall balanced reaction for the light reactions of photosynthesis?

Label the parts of the chloroplast on the figure below.

During photophosphorylation,the protons are pumped into the __________,and the ATP is made in the __________.

The third stage of the three-stage Calvin cycle

List the four proteins/enzymes and the one molecule involved in the electron transfers in the photosynthetic Z scheme,and show their positions in the "Z" shape.

Approximately how many light-harvesting chromophores are found per photosystem enzyme,such as in PSI or PSII?

What group in photosystem II (PSII)directly reacts with H2O during its light-driven oxidation?

Why are Calvin cycle reactions also referred to as the dark reactions?

Which of the following is an electron transfer molecule in photosynthesis light reactions?

Where do electrons from photosystem II (PSII)come from to re-reduce the oxidized P680+ state?

Which of the following groups of molecules are found in the shuffling reactions of stage 3 of photosynthesis?

Which protein or enzyme is NOT involved in the cyclic photophosphorylation pathway?

Principles of Biochemistry

Physical Biochemistry: Energy Conversion,water,and Membranes

Nucleic Acid Structure and Function

Protein Structure

Methods in Protein Biochemistry

Protein Function

Enzyme Mechanisms

Cell Signaling Systems

Glycolysis: a Paradigm of Metabolic Regulation

The Citrate Cycle

Oxidative Phosphorylation

Carbohydrate Structure and Function

Carbohydrate Metabolism

Lipid Structure and Function

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Metabolic Integration

Dna Replication, repair, and Recombination

Rna Synthesis, processing, and Gene Silencing

Protein Synthesis, posttranslational Modification, and Transport

Gene Regulation

Filters

During photophosphorylation,the protons are pumped into the ,and the ATP is made in the .

What group in photosystem II (PSII)directly reacts with H₂O during its light-driven oxidation?

Where do electrons from photosystem II (PSII)come from to re-reduce the oxidized P680⁺ state?