Question 1

Which of the following is the product(s)of the R.viridis photosynthetic reaction centre?

Accepted Answer

A) mobile reduced quinone 
B) NADPH 
C) reduced ferredoxin 
D) protons 
A) mobile reduced quinone 
B) NADPH 
C) reduced ferredoxin 
D) protons

Question 2

Which of the following describes how photorespiration avoided in C-4 plants?

Accepted Answer

A) decreased concentration of phosphoglycolate 
B) carbon dioxide carried toward an oxygen-rich area of the plant 
C) increased concentration of ribulose-1,5-bisphosphate 
D) carbon dioxide transportation from the mesophyll cells to the bundle sheath cells 
A) decreased concentration of phosphoglycolate 
B) carbon dioxide carried toward an oxygen-rich area of the plant 
C) increased concentration of ribulose-1,5-bisphosphate 
D) carbon dioxide transportation from the mesophyll cells to the bundle sheath cells

Question 3

Which of the following activities does NOT occur during the light-induced changes in chloroplasts?

Accepted Answer

A) activation of rubisco activase 
B) Mg²⁺ efflux from the thylakoid lumen 
C) changes in stromal pH 
D) generation of oxidizing power 
A) activation of rubisco activase 
B) Mg²⁺ efflux from the thylakoid lumen 
C) changes in stromal pH 
D) generation of oxidizing power

Question 4

Which of the following is the product of cyclic photophosphorylation?

Accepted Answer

A) NADPH 
B) molecular oxygen 
C) ATP 
D) electron gradient 
A) NADPH 
B) molecular oxygen 
C) ATP 
D) electron gradient

Question 5

Which of the following products is generated when light energy is transduced into chemical energy during photosynthesis?

Accepted Answer

A) CO₂ 
B) hexose 
C) acetyl CoA 
D) NADP+ 
A) CO₂ 
B) hexose 
C) acetyl CoA 
D) NADP+

Question 6

Which of the following enzymes catalyzes the reaction below?
Erythrose-4-P + dihydroxyacetone phosphate (DHAP)↔ sedoheptulose-1,7-bisphosphate

Accepted Answer

A) aldolase 
B) transaldolase 
C) transketolase 
D) mutase 
A) aldolase 
B) transaldolase 
C) transketolase 
D) mutase

Question 7

Which of the following is a characteristic of the chloroplast's ATP synthase?

Accepted Answer

A) is a homomultimer of subunits 
B) contains CF1CF0 complex 
C) embedded in the plasma membrane 
D) has 12 c-subunits in its F0 rotor 
A) is a homomultimer of subunits 
B) contains CF1CF0 complex 
C) embedded in the plasma membrane 
D) has 12 c-subunits in its F0 rotor

Question 8

Photosynthetic phosphorylation and oxidative phosphorylation are similar processes.Which of the following is common to both processes?

Accepted Answer

A) Both produce NADPH to be used in the reductive pentose phosphate pathway (Calvin cycle). 
B) Both contain cytochromes in their electron carrier chains. 
C) Both represent a major route of ATP hydrolysis. 
D) Both have iron clusters as electron carriers. 
A) Both produce NADPH to be used in the reductive pentose phosphate pathway (Calvin cycle). 
B) Both contain cytochromes in their electron carrier chains. 
C) Both represent a major route of ATP hydrolysis. 
D) Both have iron clusters as electron carriers.

Question 9

Many of the enzymes of the Calvin cycle are also involved in glycolysis and the pentose phosphate pathway.Which of the following molecules is specific for the glyceraldehyde-3-phosphate dehydrogenase of the Calvin cycle?

Accepted Answer

A) NADPH 
B) NADH 
C) FADH₂ 
D) FAD 
A) NADPH 
B) NADH 
C) FADH₂ 
D) FAD

Question 10

Which of the following statements regarding light is correct?

Accepted Answer

A) The energy of a photon of light is calculated by E = hv. 
B) The energy of 700 nm light is greater than that of 400 nm light. 
C) Photosynthesis allows 2 electrons to flow for each pair of photons absorbed per centre. 
D) The quantum yield of photosynthesis can be described as CO₂ fixed per photon absorbed,or O₂ evolved per photon absorbed. 
A) The energy of a photon of light is calculated by E = hv. 
B) The energy of 700 nm light is greater than that of 400 nm light. 
C) Photosynthesis allows 2 electrons to flow for each pair of photons absorbed per centre. 
D) The quantum yield of photosynthesis can be described as CO₂ fixed per photon absorbed,or O₂ evolved per photon absorbed.

Question 11

Which of the following is NOT contained in chloroplasts?

Accepted Answer

A) thylakoid membrane 
B) ribosomes 
C) DNA and RNA 
D) calcium channels 
A) thylakoid membrane 
B) ribosomes 
C) DNA and RNA 
D) calcium channels

Question 12

Which of the following regarding the reactions of the Calvin cycle is correct?

Accepted Answer

A) ADP is phosphorylated to ATP. 
B) It involves a ribulose-5-phosphate kinase. 
C) NADP+ is reduced to NADPH. 
D) An intermediate is fructose-6-bisphosphate. 
A) ADP is phosphorylated to ATP. 
B) It involves a ribulose-5-phosphate kinase. 
C) NADP+ is reduced to NADPH. 
D) An intermediate is fructose-6-bisphosphate.

Exam 20: Photosynthesis

Which of the following is the product(s)of the R.viridis photosynthetic reaction centre?

Which of the following describes how photorespiration avoided in C-4 plants?

Which of the following activities does NOT occur during the light-induced changes in chloroplasts?

Which of the following is the product of cyclic photophosphorylation?

Which of the following products is generated when light energy is transduced into chemical energy during photosynthesis?

Which of the following enzymes catalyzes the reaction below? Erythrose-4-P + dihydroxyacetone phosphate (DHAP)↔ sedoheptulose-1,7-bisphosphate

Which of the following is a characteristic of the chloroplast's ATP synthase?

Photosynthetic phosphorylation and oxidative phosphorylation are similar processes.Which of the following is common to both processes?

Many of the enzymes of the Calvin cycle are also involved in glycolysis and the pentose phosphate pathway.Which of the following molecules is specific for the glyceraldehyde-3-phosphate dehydrogenase of the Calvin cycle?

Which of the following statements regarding light is correct?

Which of the following is NOT contained in chloroplasts?

Which of the following regarding the reactions of the Calvin cycle is correct?

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

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Lipid Biosynthesis

Membranes and Membrane Transport

The Reception and Transmission of Extracellular Information

Enzymes Kinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Nutrition and the Organization of Metabolism

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Nitrogen Acquisition and Amino Acid Metabolism

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Synthesis and Degradation of Nucleotides

Recombinant Dna: Cloning and Creation of Chimeric Genes

DNA Metabolism: Replication, recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Post-Transcriptional Regulation of Gene Expression

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

Metabolic Integration and Organ Specialization

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