The essential enzyme in C-4 plants used to conserve CO2 and avoid photophosphorylation is:

A) rubisco. B) PEP carboxylase. C) glyceraldehyde-3-phosphate dehydrogenase. D) aldolase. E) ribulose-5-phosphate kinase. A) rubisco. B) PEP carboxylase. C) glyceraldehyde-3-phosphate dehydrogenase. D) aldolase. E) ribulose-5-phosphate kinase.

Which of the following is true regarding CO2 fixation in plants?

A) CAM plants work by storing carbon dioxide at night in the form of oxaloacetate B) The RUBISCO enzyme has a higher affinity for oxygen than for CO2, making it very difficult to effectively fix CO2 C) At high temperatures, C4 plants are more efficient than C3 plants because they are able to fix CO2 with minimal photorespiration D) The RUBISCO enzyme contains a Mg2+ that acts as a Lewis base, binding to CO2 and making it more susceptible to nucleophilic attack E) None of the above are true A) CAM plants work by storing carbon dioxide at night in the form of oxaloacetate B) The RUBISCO enzyme has a higher affinity for oxygen than for CO2, making it very difficult to effectively fix CO2 C) At high temperatures, C4 plants are more efficient than C3 plants because they are able to fix CO2 with minimal photorespiration D) The RUBISCO enzyme contains a Mg2+ that acts as a Lewis base, binding to CO2 and making it more susceptible to nucleophilic attack E) None of the above are true

Exam 21: Photosynthesis

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Light-dependent electron flow with the production of ATP can occur without the formation of NADPH. This process is called , which involves only one of the photosystems, .

(Multiple Choice)

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Question 21

All of the following are accomplished in the dark reactions of photosynthesis EXCEPT:

(Multiple Choice)

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Question 22

Which of the following is an outcome of ferredoxin passing electrons to cytochrome f / cytochrome b₆ complex?

(Multiple Choice)

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Question 23

When light energy is absorbed by chlorophyll an electron is promoted to a higher orbital and then transferred to a suitable acceptor resulting in light energy conversion to chemical energy in a(n):

(Multiple Choice)

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Question 24

To avoid futile cycling of carbohydrates:

(Multiple Choice)

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Question 25

If A and B represent electron-transfer molecules adjacent to chlorophyll (Chl) in the membrane, fill in the reaction sequence:

(Multiple Choice)

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Question 26

Which of the following is the product of cyclic photophosphorylation?

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Question 27

The quantum yield of photosynthesis can be defined as the amount of formed per equivalent of .

(Multiple Choice)

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Question 28

Carotenoids have primary roles in photosynthesis as:

(Multiple Choice)

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Question 29

Via PSII and PSI, electrons ultimately flow from to .

(Multiple Choice)

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Question 30

During photosynthesis-linked carbohydrate synthesis in plants, the products of photosynthesis are required for the actual fixation of carbon. Which of the following correctly explains the use of the products of photosynthesis?

(Multiple Choice)

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Question 31

Compare the two modes of photophosphorylation.

(Essay)

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Question 32

The essential enzyme in C-4 plants used to conserve CO₂ and avoid photophosphorylation is:

(Multiple Choice)

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Question 33

The appropriate sequence of events for activation of rubisco is: A.carboxylation of E B.ribulose-1,5-bisphosphate released from E C.rubisco activase D.Mg²⁺ binding E.light flash

(Multiple Choice)

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Question 34

All of the following are characteristics of CAM plants EXCEPT:

(Multiple Choice)

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Question 35

Which of the following is true regarding CO₂ fixation in plants?

(Multiple Choice)

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Question 36

All of the following are characteristics of a C-4 plant EXCEPT:

(Multiple Choice)

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Question 37

How many photons of light must be absorbed by PSII for the oxidation of 2 water molecules to form one oxygen molecule?

(Multiple Choice)

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Question 38

CO₂ fixation is one of the most critical reactions on earth. Which of the following are elements of the reaction catalyzed by the RUBISCO enzyme?

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Question 39

Photosynthesis occurs in photosynthetic localized in large organelles known as .

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Question 40

Showing 21 - 40 of 62

Exam 21: Photosynthesis

Light-dependent electron flow with the production of ATP can occur without the formation of NADPH. This process is called ____, which involves only one of the photosystems, ____.

All of the following are accomplished in the dark reactions of photosynthesis EXCEPT:

Which of the following is an outcome of ferredoxin passing electrons to cytochrome f / cytochrome b6 complex?

When light energy is absorbed by chlorophyll an electron is promoted to a higher orbital and then transferred to a suitable acceptor resulting in light energy conversion to chemical energy in a(n):

To avoid futile cycling of carbohydrates:

If A and B represent electron-transfer molecules adjacent to chlorophyll (Chl) in the membrane, fill in the reaction sequence:

Which of the following is the product of cyclic photophosphorylation?

The quantum yield of photosynthesis can be defined as the amount of ____ formed per equivalent of ____.

Carotenoids have primary roles in photosynthesis as:

Via PSII and PSI, electrons ultimately flow from ____ to ____.

During photosynthesis-linked carbohydrate synthesis in plants, the products of photosynthesis are required for the actual fixation of carbon. Which of the following correctly explains the use of the products of photosynthesis?

Compare the two modes of photophosphorylation.​

The essential enzyme in C-4 plants used to conserve CO2 and avoid photophosphorylation is:

The appropriate sequence of events for activation of rubisco is: A.carboxylation of E B.ribulose-1,5-bisphosphate released from E C.rubisco activase D.Mg2+ binding E.light flash

All of the following are characteristics of CAM plants EXCEPT:

Which of the following is true regarding CO2 fixation in plants?

All of the following are characteristics of a C-4 plant EXCEPT:

How many photons of light must be absorbed by PSII for the oxidation of 2 water molecules to form one oxygen molecule?

CO2 fixation is one of the most critical reactions on earth. Which of the following are elements of the reaction catalyzed by the RUBISCO enzyme?

Photosynthesis occurs in photosynthetic ____ localized in large organelles known as ____.

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids and the Peptide Bond

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, Tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Membranes and Membrane Transport

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Recombinant Dna, Cloning, Chimeric Genes, and Synthetic Biology

Enzymeskinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Metabolism: an Overview

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Lipid Biosynthesis

Nitrogen Acquisition and Amino Acid Metabolism

Synthesis and Degradation of Nucleotides

Metabolic Integration and Organ Specialization

Dna Metabolism: Replication, Recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Completing the Protein Life Cycle: Folding, Processing, and Degradation

The Reception and Transmission of Extracellular Information

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Light-dependent electron flow with the production of ATP can occur without the formation of NADPH. This process is called , which involves only one of the photosystems, .

Which of the following is an outcome of ferredoxin passing electrons to cytochrome f / cytochrome b₆ complex?

The quantum yield of photosynthesis can be defined as the amount of formed per equivalent of .

Via PSII and PSI, electrons ultimately flow from to .

Compare the two modes of photophosphorylation.

The essential enzyme in C-4 plants used to conserve CO₂ and avoid photophosphorylation is:

The appropriate sequence of events for activation of rubisco is: A.carboxylation of E B.ribulose-1,5-bisphosphate released from E C.rubisco activase D.Mg²⁺ binding E.light flash

Which of the following is true regarding CO₂ fixation in plants?

CO₂ fixation is one of the most critical reactions on earth. Which of the following are elements of the reaction catalyzed by the RUBISCO enzyme?

Photosynthesis occurs in photosynthetic localized in large organelles known as .