Describe 3 environmental factors that regulate the calvin cycle. include the enzyme with which each factor...
Describe 3 environmental factors that regulate the calvin cycle. include the enzyme with which each factor interacts, its effect on the rate of the calvin cycle (activator or inhibitor) and its relationship, if any, to the light reactions
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Describe 3 environmental factors that regulate the calvin cycle.
include the enzyme with which each factor...
77. Of the following, which occurs during the Calvin cycle? a) Excited electrons are conveyed from...
77. Of the following, which occurs during the Calvin cycle? a) Excited electrons are conveyed from chlorophyll to an electron acceptor b) Light energy is converted to chemical energy C) ATP and NADPH are synthesized d) Photons are absorbed e) CO2 is reduced 78. Which of the following occurs during the Calvin cycle? a) Linear electron flow produces the materials required for the fixation of carbon from carbon dioxide. b) Light energy is converted to chemical energy c) ATP is...
Question 1 2 pts How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction?...
Question 1 2 pts How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction? by decreasing the free-energy change of the reaction catalyzed by the enzyme by binding to an allosteric site, thus changing the shape of the active site of the enzyme by binding to the active site of the enzyme, thus preventing binding of the normal substrate by binding to the substrate, thus changing its shape so that it no longer binds to the active site...
PT1. Which of the following does not describe a mechanism that cells use to regulate enzyme...
PT1. Which of the following does not describe a mechanism that cells use to regulate enzyme activity? Explain. (5 points) Cells control enzyme activity by the binding of small molecules Cells control enzyme activity by phosphorylation and dephosphorylation Cells control the diffusion rates of substrate to enzymes Cells control the rate of enzyme degradation Cells control the rate of enzyme synthesis Cells control the targeting of enzymes to specific organelles PT2. Which of the following properties of an enzyme is...
Thioredoxin is a protein involved in the regulation of some Calvin cycle enzymes. Determine which statements...
Thioredoxin is a protein involved in the regulation of some Calvin cycle enzymes. Determine which statements accurately describe the regulation of some enzymes by thioredoxin. 1) Ferredoxin-thioredoxin reductase catalyzes the reduction of thioredoxin. 2) Thioredoxin transfers electrons from photosystem II to ferredoxin. 3) Thioredoxin is in its reduced form when light is available. 4) Activated thioredoxin cleaves disulfide bonds in some Calvin cycle enzymes. 5) Active thioredoxin has a disulfide bond between two cycteine residues.
8. The light reactions are made up of two photosystems. Describe each of the photosystems. Where...
8. The light reactions are made up of two photosystems. Describe each of the photosystems. Where do these reactions occur? When do they occur? 9. How are pigments used in the photosystems? How is it possible for pigments to catch light or absorb light to fuel the reactions of the chloroplast? 10. What is carbon focation? What is nitrogen fixation? The Calvin Cycle is also called the dark reactions. Why? 11. What are the steps in the dark reactions? What...
6) Which photosystem works first during lincar electron flow and what product is made using the...
6) Which photosystem works first during lincar electron flow and what product is made using the energy absorbed by that photosystem? a) photosystem I (PSI), ATP b) PSI, NADPH c) PSII, ATP d) PSII, NADPH 7) Regulatory molecules can bind to an enzyme to modify its activity. Name the site of an enzyme to which an activator or noncompetitive inhibitor can bind. a) active site b) allosteric site 8) Where do the reactions of the Calvin cycle take place in...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of acidity or alkalinity of a solution). As you may recall, the pH scale extends from 0 (very acidic) to 7 (neutral) to 14 (very alkaline or basic). We can use chemicals called buffers to help maintain a specific pH in solution. The pH scale and buffers are described in your online text (section 2.2, https://openstax.org/books/concepts- biology/pages/2-2-water). The spot plate diagram below shows a series...
EXAM 3: CHAPTER 7 1. Why are photosynthetic organisms also considered autotrophic? What are heterotrophic organisms?...
EXAM 3: CHAPTER 7 1. Why are photosynthetic organisms also considered autotrophic? What are heterotrophic organisms? How are both autotrophs and heterophs the same when it comes to the use of organic molecules to produce energy? 2. What is the particular part that oxygen plays in photosynthesis and cellular respiration? 3. Describe the structural aspects of photosynthesis. For example, where does photosynthesis take place and what parts inside the cell are used to carry out photosynthesis? What chemicals are necessary...
1. Describe the four processes in the pharmacokinetic phase. 2. What factors influence each process? Include...
1. Describe the four processes in the pharmacokinetic phase. 2. What factors influence each process? Include first-pass effect, protein binding, and free drug in your answer. 3. Describe the pharmacodynamics phase. Include onset, peak, duration, peak and trough levels. What nursing interventions are necessary when a patient takes a medication that must be monitored by peak & trough levels? Why? 4. Explain how the nursing process is used to safely give medications to patients.
3. What are the steps of the macro-environmental analysis? Describe each step and explain which analytical...
3. What are the steps of the macro-environmental analysis? Describe each step and explain which analytical techniques are used..
77. Of the following, which occurs during the Calvin cycle? a) Excited electrons are conveyed from chlorophyll to an electron acceptor b) Light energy is converted to chemical energy C) ATP and NADPH are synthesized d) Photons are absorbed e) CO2 is reduced 78. Which of the following occurs during the Calvin cycle? a) Linear electron flow produces the materials required for the fixation of carbon from carbon dioxide. b) Light energy is converted to chemical energy c) ATP is...
Question 1 2 pts How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction? by decreasing the free-energy change of the reaction catalyzed by the enzyme by binding to an allosteric site, thus changing the shape of the active site of the enzyme by binding to the active site of the enzyme, thus preventing binding of the normal substrate by binding to the substrate, thus changing its shape so that it no longer binds to the active site...
8. The light reactions are made up of two photosystems. Describe each of the photosystems. Where do these reactions occur? When do they occur? 9. How are pigments used in the photosystems? How is it possible for pigments to catch light or absorb light to fuel the reactions of the chloroplast? 10. What is carbon focation? What is nitrogen fixation? The Calvin Cycle is also called the dark reactions. Why? 11. What are the steps in the dark reactions? What...
6) Which photosystem works first during lincar electron flow and what product is made using the energy absorbed by that photosystem? a) photosystem I (PSI), ATP b) PSI, NADPH c) PSII, ATP d) PSII, NADPH 7) Regulatory molecules can bind to an enzyme to modify its activity. Name the site of an enzyme to which an activator or noncompetitive inhibitor can bind. a) active site b) allosteric site 8) Where do the reactions of the Calvin cycle take place in...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of acidity or alkalinity of a solution). As you may recall, the pH scale extends from 0 (very acidic) to 7 (neutral) to 14 (very alkaline or basic). We can use chemicals called buffers to help maintain a specific pH in solution. The pH scale and buffers are described in your online text (section 2.2, https://openstax.org/books/concepts- biology/pages/2-2-water). The spot plate diagram below shows a series...
EXAM 3: CHAPTER 7 1. Why are photosynthetic organisms also considered autotrophic? What are heterotrophic organisms? How are both autotrophs and heterophs the same when it comes to the use of organic molecules to produce energy? 2. What is the particular part that oxygen plays in photosynthesis and cellular respiration? 3. Describe the structural aspects of photosynthesis. For example, where does photosynthesis take place and what parts inside the cell are used to carry out photosynthesis? What chemicals are necessary...
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