Which Phrase Describes the Selective Permeability of a Membrane

question 29

Multiple Choice

Which phrase describes the selective permeability of a membrane?

• A)the ability of a molecule to pass through a membrane
• B)the ability of only certain molecules to pass across a membrane
• C)the need for carrier proteins to transport certain molecules
• D)the movement of a molecule from an area of greater concentration to an area of lesser concentration

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Definitions:

Experimental

Pertaining to a method of research that tests a hypothesis under controlled conditions.

Double-blind

A study or clinical trial design in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Dependent Variable

A variable that an experimenter predicts will be affected by manipulations of the independent variable.

Experimenter's Manipulations

The deliberate changes or variations introduced by researchers in an experiment to investigate their effects on the outcome.