Transport of a Compound Across a Cell Membrane (Down a Concentration

question 53

Multiple Choice

Transport of a compound across a cell membrane (down a concentration gradient) was measured at several concentrations. The presence or absence of ATP had no effect on the transport of this compound. Which best describes the mechanism of transport?

• A) facilitated diffusion
• B) passive diffusion
• C) primary active transport
• D) secondary active transport
• E) proton pumping

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Definitions:

Split

Dividing a single entity into multiple parts or segments, often used in computing to break down data or in UI design to partition interfaces.

Merge

The process of combining two or more sets of information, text, files, or images into a single entity.

Animation

The process of designing, drawing, making layouts and preparation of photographic sequences which are integrated in multimedia and gaming products.

Table Cell

An individual unit within a table where a row and column intersect, often used to display text, numbers, or images.