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Home Q & A Board Biology-Related Homework Help Zoology and Botany (Moderator: ehd123)
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The major product of photosynthesis that is exported from the leaves to the rest
The major product of photosynthesis that is exported from the leaves to the rest
The major product of photosynthesis that is exported from the leaves to the rest of the plant is
a. glucose.
b. amino acids.
c. starch.
d. sucrose.
e. nucleotides.
arealhero   274   3 Replies
9 years ago
In C3 photosynthesis, NADPH is used for the a. reduction of O2 to water. b. synt
In C3 photosynthesis, NADPH is used for the a. reduction of O2 to water. b. synt
In C3 photosynthesis, NADPH is used for the
a. reduction of O2 to water.
b. synthesis of ATP.
c. the regeneration phase of the Calvin cycle.
d. formation of 3-phosphoglycerate (3-PG).
e. reduction of 3-phosphoglycerate (3-PG)
arealhero   339   3 Replies
9 years ago
The ultimate source of energy for ATP synthesis in chloroplasts is a. electron t
The ultimate source of energy for ATP synthesis in chloroplasts is a. electron t
The ultimate source of energy for ATP synthesis in chloroplasts is
a. electron transport.
b. the electrochemical proton gradient.
c. light.
d. energized chlorophylls.
e. NADPH.
arealhero   834   3 Replies
9 years ago
The immediate source of energy for ATP synthesis in chloroplasts is a. electron
The immediate source of energy for ATP synthesis in chloroplasts is a. electron
The immediate source of energy for ATP synthesis in chloroplasts is
a. electron transport.
b. the electrochemical proton gradient.
c. light.
d. energized chlorophylls.
e. NADPH.
arealhero   413   3 Replies
9 years ago
Cyclic electron transport a. involves photosystem II. b. results in the formatio
Cyclic electron transport a. involves photosystem II. b. results in the formatio
Cyclic electron transport
a. involves photosystem II.
b. results in the formation of NADPH.
c. is coupled to proton uptake into the thylakoid lumen.
d. requires the oxidation of water.
e. does not use the electron transport
arealhero   258   3 Replies
9 years ago
The products of noncyclic electron transport are a. ATP. b. NADP+ and ATP. c. NA
The products of noncyclic electron transport are a. ATP. b. NADP+ and ATP. c. NA
The products of noncyclic electron transport are
a. ATP.
b. NADP+ and ATP.
c. NADPH and ATP.
d. NADPH, O2, and ATP.
e. NADP+, O2, and ATP.
arealhero   304   3 Replies
9 years ago
Reaction center chlorophylls a. undergo reduction when in the excited state. b.
Reaction center chlorophylls a. undergo reduction when in the excited state. b.
Reaction center chlorophylls
a. undergo reduction when in the excited state.
b. become oxidized in the dark.
c. are oxidized when in the excited state.
d. have a different structure from most of the antennae chlorophylls.
e.
arealhero   219   3 Replies
9 years ago
Which statement given below best characterizes the properties of a photosystem?
Which statement given below best characterizes the properties of a photosystem?
Which statement given below best characterizes the properties of a photosystem?
a. A photosystem consists of just antennae pigments.
b. Photosystems do not contain proteins.
c. A photosystem consists of just reaction center chlorophyll
arealhero   602   3 Replies
9 years ago
Which of the following statements about the role of chlorophyll in photosynthesi
Which of the following statements about the role of chlorophyll in photosynthesi
Which of the following statements about the role of chlorophyll in photosynthesis is false?
a. Chlorophyll appears green because it reflects green light.
b. Most of the chlorophyll in a plant functions to gather light.
c. Chlorophyll i
arealhero   167   3 Replies
9 years ago
The _______ of photosynthesis is similar to the _______ of chlorophylls.
The _______ of photosynthesis is similar to the _______ of chlorophylls.
The _______ of photosynthesis is similar to the _______ of chlorophylls.
a. action spectrum; fluorescence spectrum
b. absorption spectrum; action spectrum
c. action spectrum; absorption spectrum
d. absorption spectrum; fluorescenc
arealhero   222   3 Replies
9 years ago
Which of the following statements about the light-independent reactions of photo
Which of the following statements about the light-independent reactions of photo
Which of the following statements about the light-independent reactions of photosynthesis is not correct?
a. The light-independent reactions refer to the pathways by which CO2 is reduced to carbohydrates.
b. The light-independent reactions
arealhero   162   3 Replies
9 years ago
In green plant photosynthesis, water is a. oxidized to oxygen gas (O2) in the li
In green plant photosynthesis, water is a. oxidized to oxygen gas (O2) in the li
In green plant photosynthesis, water is
a. oxidized to oxygen gas (O2) in the light.
b. reduced to hydrogen gas.
c. used to hydrolyze ATP.
d. oxidized to O2 in the dark.
e. an electron acceptor.
arealhero   272   3 Replies
9 years ago
Photorespiration a. takes place only in C4 plants. b. includes reactions carried
Photorespiration a. takes place only in C4 plants. b. includes reactions carried
Photorespiration
a. takes place only in C4 plants.
b. includes reactions carried out in peroxisomes.
c. increases the yield of photosynthesis.
d. is catalyzed by PEP carboxylase.
e. is independent of light intensity.
arealhero   241   3 Replies
9 years ago
Photosynthesis in green plants occurs only during the day. Respiration in plants
Photosynthesis in green plants occurs only during the day. Respiration in plants
Photosynthesis in green plants occurs only during the day. Respiration in plants occurs
a. only at night.
b. only when there is enough ATP.
c. only during the day.
d. all the time.
e. in the chloroplast after photosynthesis.
arealhero   1324   3 Replies
9 years ago
In C4 photosynthesis, a. 3PG is the first product of CO2 fixation. b. rubisco ca
In C4 photosynthesis, a. 3PG is the first product of CO2 fixation. b. rubisco ca
In C4 photosynthesis,
a. 3PG is the first product of CO2 fixation.
b. rubisco catalyzes the first step in the pathway.
c. 4-carbon acids are formed by PEP carboxylase in bundle sheath cells.
d. photosynthesis continues at lower CO
arealhero   330   3 Replies
9 years ago
Which statement about the Calvin cycle is not true?
Which statement about the Calvin cycle is not true?
Which statement about the Calvin cycle is not true?
a. CO2 reacts with RuBP to form 3PG.
b. RuBP forms by the metabolism of 3PG.
c. ATP and NADPH form when 3PG is oxidized.
d. The concentration of 3PG rises if the light is switche
arealhero   227   3 Replies
9 years ago
In chloroplasts, a. light leads to the flow of protons out of the thylakoids. b.
In chloroplasts, a. light leads to the flow of protons out of the thylakoids. b.
In chloroplasts,
a. light leads to the flow of protons out of the thylakoids.
b. ATP is formed when protons flow into the thylakoid lumen.
c. light causes the thylakoid lumen to become less acidic than the stroma.
d. protons retur
arealhero   208   3 Replies
9 years ago
Which of the following does not happen in noncyclic electron transport?
Which of the following does not happen in noncyclic electron transport?
Which of the following does not happen in noncyclic electron transport?
a. Oxygen gas is released.
b. ATP forms.
c. Water donates electrons and protons.
d. NADPH forms.
e. CO2 reacts with RuBP.
arealhero   215   3 Replies
9 years ago
In cyclic electron transport, a. oxygen gas is released. b. ATP is formed. c. wa
In cyclic electron transport, a. oxygen gas is released. b. ATP is formed. c. wa
In cyclic electron transport,
a. oxygen gas is released.
b. ATP is formed.
c. water donates electrons and protons.
d. NADPH forms.
e. CO2 reacts with RuBP.
arealhero   224   3 Replies
9 years ago
Which statement about chlorophylls is not true?
Which statement about chlorophylls is not true?
Which statement about chlorophylls is not true?
a. Chlorophylls absorb light near both ends of the visible spectrum.
b. Chlorophylls can accept energy from other pigments, such as carotenoids.
c. Excited chlorophyll can either reduce a
arealhero   275   3 Replies
9 years ago
Which statement about light is true?
Which statement about light is true?
Which statement about light is true?
a. An absorption spectrum is a plot of biological effectiveness versus wavelength.
b. An absorption spectrum may be a good means of identifying a pigment.
c. Light need not be absorbed to produce a
arealhero   176   3 Replies
9 years ago
In noncyclic photosynthetic electron transport, water is used to a. excite chlor
In noncyclic photosynthetic electron transport, water is used to a. excite chlor
In noncyclic photosynthetic electron transport, water is used to
a. excite chlorophyll.
b. hydrolyze ATP.
c. reduce Pi.
d. oxidize NADPH.
e. reduce chlorophyll.
arealhero   219   3 Replies
9 years ago
Why are plants green?
Why are plants green?
Why are plants green?
arealhero   144   3 Replies
9 years ago
How do accessory pigments enhance photosynthetic activity in plants?
How do accessory pigments enhance photosynthetic activity in plants?
How do accessory pigments enhance photosynthetic activity in plants?
arealhero   336   3 Replies
9 years ago
Explain the differences between cyclic and noncyclic electron flow. Why are both
Explain the differences between cyclic and noncyclic electron flow. Why are both
Explain the differences between cyclic and noncyclic electron flow. Why are both processes necessary?
arealhero   396   3 Replies
9 years ago
The Calvin cycle was once referred to as the “dark” reactions of photosynthesis.
The Calvin cycle was once referred to as the “dark” reactions of photosynthesis.
The Calvin cycle was once referred to as the “dark” reactions of photosynthesis. Why is this a misnomer?
arealhero   313   3 Replies
9 years ago
Compare and contrast C3, C4, and CAM plants.
Compare and contrast C3, C4, and CAM plants.
Compare and contrast C3, C4, and CAM plants.
arealhero   231   3 Replies
9 years ago
Rubisco has both carboxylase and oxygenase activities. These processes compete w
Rubisco has both carboxylase and oxygenase activities. These processes compete w
Rubisco has both carboxylase and oxygenase activities. These processes compete with each other. What determines which function the enzyme has? What conditions favor photorespiration? What conditions favor photosynthesis?
arealhero   210   3 Replies
9 years ago
Why do plants undergo both photosynthesis and cellular respiration, even in the
Why do plants undergo both photosynthesis and cellular respiration, even in the
Why do plants undergo both photosynthesis and cellular respiration, even in the daytime? Why don’t they simply use the ATP produced in the light reactions of photosynthesis to drive cellular processes?
arealhero   355   3 Replies
9 years ago
Why do plants undergo both the light reactions of photosynthesis and the Calvin
Why do plants undergo both the light reactions of photosynthesis and the Calvin
Why do plants undergo both the light reactions of photosynthesis and the Calvin cycle? Why don’t they simply use the ATP produced in the light reactions of photosynthesis to drive cellular processes?
arealhero   268   3 Replies
9 years ago
Plants consume CO2 and give off O2. How is this possible if plants must also und
Plants consume CO2 and give off O2. How is this possible if plants must also und
Plants consume CO2 and give off O2. How is this possible if plants must also undergo cellular respiration?
arealhero   306   3 Replies
9 years ago
Activities such as amino acid synthesis and active transport in plant cells are
Activities such as amino acid synthesis and active transport in plant cells are
Activities such as amino acid synthesis and active transport in plant cells are powered by
a. the light-dependent and light-independent reactions of photosynthesis.
b. ATP from the light reactions of photosynthesis.
c. ATP from fermen
arealhero   563   3 Replies
9 years ago
Photosynthesis occurs a. in all plant cells. b. only in photosynthetic plant cel
Photosynthesis occurs a. in all plant cells. b. only in photosynthetic plant cel
Photosynthesis occurs
a. in all plant cells.
b. only in photosynthetic plant cells.
c. only in plant cells lacking mitochondria.
d. only in the stroma.
e. only in the thylakoid membrane.
arealhero   292   3 Replies
9 years ago
Which of the following statements regarding the relationship between photosynthe
Which of the following statements regarding the relationship between photosynthe
Which of the following statements regarding the relationship between photosynthesis and cellular respiration in plants is true?
a. Photosynthesis occurs in specialized photosynthetic cells.
b. Cellular respiration occurs in specialized resp
arealhero   195   3 Replies
9 years ago
CAM plants differ from C4 plants in that a. photosynthesis can occur at night in
CAM plants differ from C4 plants in that a. photosynthesis can occur at night in
CAM plants differ from C4 plants in that
a. photosynthesis can occur at night in CAM plants.
b. CO2 is stored in CAM plants as malic acid.
c. the stomata of CAM plants close during periods that favor photorespiration.
d. CAM plant
arealhero   271   3 Replies
9 years ago
The fixation of CO2 by PEP carboxylase functions to a. concentrate O2 for use in
The fixation of CO2 by PEP carboxylase functions to a. concentrate O2 for use in
The fixation of CO2 by PEP carboxylase functions to
a. concentrate O2 for use in photosynthetic cells.
b. allow plants to close stomata without the occurrence of photorespiration.
c. allow plants to photosynthesize in the dark.
d.
arealhero   380   3 Replies
9 years ago
Which of the following statements regarding photorespiration is true?
Which of the following statements regarding photorespiration is true?
Which of the following statements regarding photorespiration is true?
a. Photorespiration is a metabolically expensive pathway.
b. Photorespiration is avoided when CO2 levels are low.
c. Photorespiration increases the overall CO2 that
arealhero   425   3 Replies
9 years ago
The Calvin cycle results in the production of a. glucose. b. starch. c. rubisco.
The Calvin cycle results in the production of a. glucose. b. starch. c. rubisco.
The Calvin cycle results in the production of
a. glucose.
b. starch.
c. rubisco.
d. G3P.
e. ATP.
arealhero   536   3 Replies
9 years ago
Which of the following begins the Calvin cycle that results in the entire pathwa
Which of the following begins the Calvin cycle that results in the entire pathwa
Which of the following begins the Calvin cycle that results in the entire pathway being carried out under environmental conditions?
a. 3PG is reduced to G3P using ATP and NADPH + H+.
b. RuBP is regenerated.
c. CO2 and RuBP join forming
arealhero   178   3 Replies
9 years ago
Which of the following statements concerning rubisco is true?
Which of the following statements concerning rubisco is true?
Which of the following statements concerning rubisco is true?
a. Rubisco is a carboxylase.
b. Rubisco preferentially binds to O2 over CO2.
c. Rubisco is absent from C4 and CAM plants.
d. Rubisco catalyzes the splitting in water to
arealhero   225   3 Replies
9 years ago
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