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The figure below illustrates a portion of a cell membrane. X denotes a membrane-spanning protein channel. M ustration of a partial cell membrane Which of the following is most likely true about the structure of X? X A The upper and lower ends of X are hydrophilic and its middle is hydrophobic. C D The upper and lower ends of X, as well as its middle, are all hydrophobic. The upper and lower ends of X are hydrophobic and its middle is hydrophilic. The upper and lower ends of X, as well as its middle, are all hydrophilic.

The figure below illustrates a portion of a cell membrane. X denotes a membrane-spanning protein channel. M ustration of a partial cell membrane Which of the following is most likely true about the structure of X? X A The upper and lower ends of X are hydrophilic and its middle is hydrophobic. C D The upper and lower ends of X, as well as its middle, are all hydrophobic. The upper and lower ends of X are hydrophobic and its middle is hydrophilic. The upper and lower ends of X, as well as its middle, are all hydrophilic.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The figure below illustrates a portion of a cell membrane. X denotes a membrane-spanning protein channel. *Illustration of a partial cell membrane* Which of the following is most likely true about the structure of X? A. The upper and lower ends of X are hydrophilic and its middle is hydrophobic. B. The upper end and lower ends of X, as well as its middle, are all hydrophobic. C. The upper and lower ends of X are hydrophobic and its middle is hydrophilic. D. The upper and lower ends of X, as well as its middle, are all hydrophilic. *Diagram Explanation:* The diagram shows a section of a cell membrane with a protein channel labeled X. The membrane is composed of a lipid bilayer where the hydrophilic (water-attracting) heads face outward and the hydrophobic (water-repelling) tails face inward. The protein channel spans the membrane, suggesting its structure accommodates passage across the hydrophobic interior of the membrane.
Transcribed Image Text:The figure below illustrates a portion of a cell membrane. X denotes a membrane-spanning protein channel. *Illustration of a partial cell membrane* Which of the following is most likely true about the structure of X? A. The upper and lower ends of X are hydrophilic and its middle is hydrophobic. B. The upper end and lower ends of X, as well as its middle, are all hydrophobic. C. The upper and lower ends of X are hydrophobic and its middle is hydrophilic. D. The upper and lower ends of X, as well as its middle, are all hydrophilic. *Diagram Explanation:* The diagram shows a section of a cell membrane with a protein channel labeled X. The membrane is composed of a lipid bilayer where the hydrophilic (water-attracting) heads face outward and the hydrophobic (water-repelling) tails face inward. The protein channel spans the membrane, suggesting its structure accommodates passage across the hydrophobic interior of the membrane.
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