Which of These Statements Describes Carrier-Mediated Transport

question 198

Multiple Choice

Which of these statements describes carrier-mediated transport

• A)It involves a specific membrane protein that serves as a carrier molecule.
• B)It always transports substances against a concentration gradient.
• C)It always requires energy expenditure.
• D)It always transports substances along a concentration gradient.

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Definitions:

Mass Transit

A public transportation system designed to move large numbers of people efficiently within urban and suburban areas.

Working-Class Neighborhoods

are residential areas predominantly inhabited by individuals and families engaged in blue-collar jobs, often characterized by more affordable housing and a tight-knit sense of community.

Urban Outskirts

Areas located on the edge of cities, typically characterized by a transition from dense urban structures to more suburban or rural settings.

Urban Housing Conditions

The state and quality of living environments in city areas, often highlighting issues related to overcrowding, sanitation, and access to amenities.