Active Transport Is Different from Simple Diffusion Because Active Transport

question 22

Multiple Choice

Active transport is different from simple diffusion because active transport

• A) requires energy.
• B) moves molecules against a concentration gradient.
• C) requires the use of proteins embedded within the cell membrane.
• D) moves molecules from an area of lower concentration to an area of higher concentration.
• E) All answers are correct.

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Definitions:

Heterotrophs

Organisms that cannot synthesize their own food and rely on other organisms for nutrients.

Ecosystem Function

The natural processes and interactions that maintain the biodiversity and balance within an ecosystem, such as nutrient cycling and energy flow.

Decomposers

Organisms that break down dead or decaying organisms, and in doing so, carry out the natural process of decomposition.

Photosynthesis

Process, usually occurring within chloroplasts, that uses solar energy to reduce carbon dioxide to carbohydrate.