Biology CLEP Prep Practice Exam

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Prepare for the Biology CLEP Test with comprehensive flashcards and multiple choice questions. Each question comes with explanations and hints to ensure a full understanding. Boost your exam readiness today!

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What type of proteins regulate the flow of materials into and out of cells?

Receptors
Enzymes
Transporters
Structural

The correct answer is: Transporters

Transporters are the proteins that regulate the flow of materials into and out of cells, doing so by moving molecules and ions across the cell membrane. Receptors are involved in cell signaling, not in regulating material flow. Enzymes also do not have this specific function and instead are involved in catalyzing chemical reactions. Structural proteins provide support and structure to cells, but do not have a direct role in regulating material flow. Therefore, transporters are the most appropriate choice for this question.