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Proton pumps in the plasma membranes of plant cells may
- a)generate a membrane potential that helps drive cations into the cell through their specific carriers.
- b)be coupled to the movement ofK+into guard cells.
- c)drive the accumulation of sucrose in sievetube members.
- d)be involved in all of the above
Correct answer is option 'D'. Can you explain this answer?
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Proton pumps in the plasma membranes of plant cells maya)generate a me...
Proton pumps in the plasma membranes of plant cells have multiple functions. Let's discuss each of them in detail:
1. Generate a membrane potential that helps drive cations into the cell through their specific carriers:
Proton pumps create a proton gradient across the plasma membrane, which generates a membrane potential. This potential can be used to drive the transport of cations into the cell through specific carriers. For example, in root hairs, the proton pumps generate a negative membrane potential that helps in the uptake of positively charged ions such as K+, Ca2+, and Mg2+.
2. Coupled to the movement of K+ into guard cells:
Guard cells are specialized cells in plant leaves that regulate the opening and closing of stomata, which are small pores on the leaf surface. When the plant needs to conserve water, the guard cells pump out K+ ions, which causes water to flow out of the cell, leading to the closing of stomata. Proton pumps in the plasma membrane of guard cells are coupled to the movement of K+ ions and help in the regulation of stomatal opening and closing.
3. Drive the accumulation of sucrose in sieve tube members:
Sieve tube members are specialized cells in the phloem, which transport sugars and other nutrients from photosynthetic tissues to non-photosynthetic tissues in the plant. Proton pumps in the plasma membrane of sieve tube members drive the accumulation of sucrose by creating a proton gradient across the membrane. This gradient is then used to power the movement of sucrose into the sieve tube members.
In summary, proton pumps in the plasma membranes of plant cells have multiple functions, including generating a membrane potential that helps drive cations into the cell through their specific carriers, being coupled to the movement of K+ into guard cells, and driving the accumulation of sucrose in sieve tube members.
1. Generate a membrane potential that helps drive cations into the cell through their specific carriers:
Proton pumps create a proton gradient across the plasma membrane, which generates a membrane potential. This potential can be used to drive the transport of cations into the cell through specific carriers. For example, in root hairs, the proton pumps generate a negative membrane potential that helps in the uptake of positively charged ions such as K+, Ca2+, and Mg2+.
2. Coupled to the movement of K+ into guard cells:
Guard cells are specialized cells in plant leaves that regulate the opening and closing of stomata, which are small pores on the leaf surface. When the plant needs to conserve water, the guard cells pump out K+ ions, which causes water to flow out of the cell, leading to the closing of stomata. Proton pumps in the plasma membrane of guard cells are coupled to the movement of K+ ions and help in the regulation of stomatal opening and closing.
3. Drive the accumulation of sucrose in sieve tube members:
Sieve tube members are specialized cells in the phloem, which transport sugars and other nutrients from photosynthetic tissues to non-photosynthetic tissues in the plant. Proton pumps in the plasma membrane of sieve tube members drive the accumulation of sucrose by creating a proton gradient across the membrane. This gradient is then used to power the movement of sucrose into the sieve tube members.
In summary, proton pumps in the plasma membranes of plant cells have multiple functions, including generating a membrane potential that helps drive cations into the cell through their specific carriers, being coupled to the movement of K+ into guard cells, and driving the accumulation of sucrose in sieve tube members.
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Proton pumps in the plasma membranes of plant cells maya)generate a me...
D. is the Ans, related to opening and closing stomata or k+pump
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Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer?
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Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer?.
Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Proton pumps in the plasma membranes of plant cells maya)generate a membrane potential that helps drive cations into the cell through their specific carriers.b)be coupled to the movement ofK+into guard cells.c)drive the accumulation of sucrose in sievetube members.d)be involved in all of the aboveCorrect answer is option 'D'. Can you explain this answer?.
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