Plasma Membranes, the Key Boundary Layer of Cells, Are Composed

question 52

Multiple Choice

Plasma membranes, the key boundary layer of cells, are composed of amphipathic molecules called phospholipids. Why would neither purely hydrophilic nor purely hydrophobic molecules be a suitable molecule for plasma membranes?

• A) Hydrophilic molecules would dissolve in the aqueous environment in which cells live, disrupting the structural integrity of the cell.
• B) Hydrophobic molecules would dissolve in the aqueous environment in which cells live, disrupting the structural integrity of the cell, while hydrophilic molecules could not interact.
• C) Hydrophilic molecules would dissolve in the aqueous environment in which cells live, disrupting the structural integrity of the cell, and hydrophobic molecules would be unable to interact with the aqueous environment in which cells live.
• D) Hydrophobic molecules would be unable to interact with the aqueous environment in which cells live.
• E) Both hydrophilic and hydrophobic molecules would dissolve in the aqueous environment in which cells live, disrupting the structural integrity of the cell.

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Definitions:

Personality

A unique set of emotional, thought, and behavioral patterns that define how a person reacts to situations and interacts with others.

Psychosexual Development

Psychosexual development is a concept in Freudian psychology that outlines how personality develops through various stages of childhood, each characterized by a different focus of libido or sexual energy.

Fixation

An obsessive or persistent focus on an object, concept, or person that can impede emotional and developmental growth.

Psychosexual Development

Freud's theory describing how personality develops through stages centered on erogenous zones from childhood to adulthood.