Question 1

The regeneration of what CO₂ acceptor molecule allows for continuous carbon assimilation in the Calvin cycle?

Accepted Answer

A) glyceraldehyde-3-phosphate 
B) dihydroxyacetone phosphate 
C) ribulose-1,5-bisphosphate 
D) glycerate-1,3-bisphosphate 
E) 3-phosphoglycerate 
A) glyceraldehyde-3-phosphate 
B) dihydroxyacetone phosphate 
C) ribulose-1,5-bisphosphate 
D) glycerate-1,3-bisphosphate 
E) 3-phosphoglycerate C

Question 2

Why do tree leaves turn colors in autumn?

Accepted Answer

The chlorophyll within the leaves is no longer made because the plant has received signals to "overwinter." As a result,the decrease in the amount of chlorophyll allows the accessory pigments to become visible.Because these pigments are species specific,we see the range of colors characteristic for the fall season.

Question 3

Match between columns
                        Premises: chromoplast
amyloplast
chloroplast
proplastid
elaioplast

Accepted Answer

The Answer of nucleic acid production and plastid precursor and is...

Question 4

Which of the following statements correctly characterizes the relationship between NADP⁺/NADPH and NAD⁺/NADH?

Accepted Answer

A) Both are used extensively during photosynthesis in oxygenic phototrophs. 
B) Neither are helpful to oxygenic phototrophs. 
C) NADP⁺/NADPH has an extra phosphate compared to NAD⁺/NADH. 
D) NADP⁺/NADPH is used primarily for catabolic reactions. 
E) Only NAD⁺/NADH is used to transport electrons and protons. 
A) Both are used extensively during photosynthesis in oxygenic phototrophs. 
B) Neither are helpful to oxygenic phototrophs. 
C) NADP⁺/NADPH has an extra phosphate compared to NAD⁺/NADH. 
D) NADP⁺/NADPH is used primarily for catabolic reactions. 
E) Only NAD⁺/NADH is used to transport electrons and protons.

Question 5

Biosynthesis of sucrose occurs in the

Accepted Answer

A) cytoplasm. 
B) stroma. 
C) thylakoid lumen. 
D) intermembrane space. 
E) stroma thylakoids. 
A) cytoplasm. 
B) stroma. 
C) thylakoid lumen. 
D) intermembrane space. 
E) stroma thylakoids.

Question 6

The relationship between photosystem I (PSI)and photosystem II (PSII)is correctly described by which of the following statements?

Accepted Answer

A) PSI absorbs only short wavelengths of light. 
B) Electrons are excited by PSI or PSII, but not both. 
C) PSI is designated P700, whereas PSII is designated P680. 
D) The absorption maximum of PSII is 700 nm. 
E) The absorption maximum of PSI is 680 nm. 
A) PSI absorbs only short wavelengths of light. 
B) Electrons are excited by PSI or PSII, but not both. 
C) PSI is designated P700, whereas PSII is designated P680. 
D) The absorption maximum of PSII is 700 nm. 
E) The absorption maximum of PSI is 680 nm.

Question 7

Which of the following pigments is found exclusively in red algae?

Accepted Answer

A) chlorophyll a 
B) chlorophyll c 
C) lutein 
D) phycoerythrin 
E) β-carotene 
A) chlorophyll a 
B) chlorophyll c 
C) lutein 
D) phycoerythrin 
E) β-carotene

Question 8

Which of the following statements regarding CAM plants is true?

Accepted Answer

A) Stomata are open during the day. 
B) Malate is stored in large vacuoles. 
C) CO₂ is transported directly into mesophyll cells. 
D) They assimilate 25% less CO₂ than C₃ plants. 
E) both choices B and C 
A) Stomata are open during the day. 
B) Malate is stored in large vacuoles. 
C) CO₂ is transported directly into mesophyll cells. 
D) They assimilate 25% less CO₂ than C₃ plants. 
E) both choices B and C

Question 9

Match between columns
                        Premises: Hatch-Slack cycle
Calvin cycle
crassulacean acid metabolism (CAM)
glycolate pathway

Accepted Answer

The Answer of C₄ plants and fungi and lysosome passage is...

Question 10

________ proteins stabilize the arrangement of the chlorophyll within a photosystem and modify the absorption spectra of specific chlorophyll molecules.

Accepted Answer

The answer of ________ proteins stabilize the arrangement of the...

Question 11

Which of the following compounds is not a source of electrons for anoxygenic photosynthesis?

Accepted Answer

A) SH⁻ 
B) S₂O₃²⁻ 
C) H₂O 
D) succinate 
E) All of the above are used. 
A) SH⁻ 
B) S₂O₃²⁻ 
C) H₂O 
D) succinate 
E) All of the above are used.

Question 12

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

Accepted Answer

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

Question 13

Which of the following is not an essential feature of electron transfer from water to NADP⁺?

Accepted Answer

A) photosystem II complex 
B) photosystem I complex 
C) coenzyme Q 
D) plastocyanin (P
C)  
E) cytochrome b₆/f complex 
A) photosystem II complex 
B) photosystem I complex 
C) coenzyme Q 
D) plastocyanin (P
C)  
E) cytochrome b₆/f complex

Question 14

Which two triose phosphates are produced during the Calvin cycle and are the starting points for starch and sucrose synthesis?

Accepted Answer

A) 3-phosphoglycerate and glyceraldehyde-3-phosphate 
B) dihydroxyacetone phosphate and glyceraldehyde-3-phosphate 
C) ribulose-1,5-bisphosphate and glycerol phosphate 
D) dihydroxyacetone phosphate and glycerate-1,3-bisphosphate 
E) 3-phosphoglycerate and ribulose-1,5-bisphosphate 
A) 3-phosphoglycerate and glyceraldehyde-3-phosphate 
B) dihydroxyacetone phosphate and glyceraldehyde-3-phosphate 
C) ribulose-1,5-bisphosphate and glycerol phosphate 
D) dihydroxyacetone phosphate and glycerate-1,3-bisphosphate 
E) 3-phosphoglycerate and ribulose-1,5-bisphosphate

Question 15

NADPH contains the pentose sugar ________ and the nitrogenous base ________.

Accepted Answer

A) glucose; thymine 
B) deoxyribose; cytosine 
C) deoxyribose; nicotinamide 
D) ribose; adenine 
E) ribose; nicotinamide 
A) glucose; thymine 
B) deoxyribose; cytosine 
C) deoxyribose; nicotinamide 
D) ribose; adenine 
E) ribose; nicotinamide

Question 16

Green and purple bacteria are ________.This group of organisms removes electrons from sulfide,thiosulfate,and succinate to generate NADPH.

Accepted Answer

anoxygenic

Question 17

In the Calvin cycle,the enzyme that catalyzes the capture of carbon dioxide and the formation of 3-phosphoglycerate is

Accepted Answer

A) phosphoglycerokinase. 
B) ribulose bisphosphate carboxylase/oxygenase (rubisco). 
C) triose phosphate isomerase. 
D) phosphoribulokinase. 
E) glyceraldehyde-3-phosphate dehydrogenase. 
A) phosphoglycerokinase. 
B) ribulose bisphosphate carboxylase/oxygenase (rubisco). 
C) triose phosphate isomerase. 
D) phosphoribulokinase. 
E) glyceraldehyde-3-phosphate dehydrogenase.

Question 18

Which of the following statements accurately describes the Calvin cycle?

Accepted Answer

A) It is a carbon assimilation process. 
B) In this process, carbon dioxide is reduced to organic sugars. 
C) It occurs in the chloroplast stroma. 
D) The Calvin cycle is a means of carbon fixation. 
E) all of the above 
A) It is a carbon assimilation process. 
B) In this process, carbon dioxide is reduced to organic sugars. 
C) It occurs in the chloroplast stroma. 
D) The Calvin cycle is a means of carbon fixation. 
E) all of the above

Question 19

The endosymbiont theory attempts to explain the evolutionary origin of eukaryotes.Describe this theory in a paragraph.Be sure to use these terms: semiautonomous organelles,symbiotic relationship,protoeukaryote,purple bacteria,cyanobacteria,mitochondria,and chloroplasts.

Accepted Answer

Answers will vary,but the student should

Question 20

Some herbicides,such as paraquat,work by causing the oxidation of NADPH to NADP. Although this is a potent herbicide,it also is toxic to humans,particularly when inhaled. How does paraquat interfere with photosynthesis and thus act as an herbicide? How might paraquat be causing toxicity for human cells?

Accepted Answer

By oxidizing NADPH to NADP directly,the

Exam 11: Phototrophic Energy Metabolism: Photosynthesis

The regeneration of what CO₂ acceptor molecule allows for continuous carbon assimilation in the Calvin cycle?

Why do tree leaves turn colors in autumn?

Which of the following statements correctly characterizes the relationship between NADP⁺/NADPH and NAD⁺/NADH?

Biosynthesis of sucrose occurs in the

The relationship between photosystem I (PSI)and photosystem II (PSII)is correctly described by which of the following statements?

Which of the following pigments is found exclusively in red algae?

Which of the following statements regarding CAM plants is true?

________ proteins stabilize the arrangement of the chlorophyll within a photosystem and modify the absorption spectra of specific chlorophyll molecules.

Which of the following compounds is not a source of electrons for anoxygenic photosynthesis?

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

Which of the following is not an essential feature of electron transfer from water to NADP⁺?

Which two triose phosphates are produced during the Calvin cycle and are the starting points for starch and sucrose synthesis?

NADPH contains the pentose sugar ________ and the nitrogenous base ________.

Green and purple bacteria are ________.This group of organisms removes electrons from sulfide,thiosulfate,and succinate to generate NADPH.

In the Calvin cycle,the enzyme that catalyzes the capture of carbon dioxide and the formation of 3-phosphoglycerate is

Which of the following statements accurately describes the Calvin cycle?

The endosymbiont theory attempts to explain the evolutionary origin of eukaryotes.Describe this theory in a paragraph.Be sure to use these terms: semiautonomous organelles,symbiotic relationship,protoeukaryote,purple bacteria,cyanobacteria,mitochondria,and chloroplasts.

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters

NADPH contains the pentose sugar and the nitrogenous base .