In an Experiment Involving Planar Bilayers, a Solution of Table

question 38

Multiple Choice

In an experiment involving planar bilayers, a solution of table salt sodium and chloride ions in water) is added on the left side of the membrane, while pure water is added on the right side. After 30 minutes, the researchers test for the presence of ions on each side of the membrane. The right side tests negative for ions. What can you conclude?

• A) The water somehow blocked the movement of ions across the membrane.
• B) The left side would probably also test negative for ions.
• C) Ions cannot cross planar bilayers.
• D) The experiment failed.

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Definitions:

Accident

An unintended or unforeseeable event causing damage or injury.

Division

In logic, the process of breaking down a general statement into more detailed particular statements.

Genus

A category of classification in biology ranking above species and below family, or more generally, a class of items that share common characteristics.

Species

A collection of comparable organisms from nature able to partake in the process of interbreeding or gene swapping.