As a Result of Regulation of Fuel Additives by the Clean

question 22

Multiple Choice

As a result of regulation of fuel additives by the Clean Air Act,________ was largely phased out of use as an octane enhancer in gasoline.

• A)toluene
• B)lead
• C)methanol
• D)nitrous oxide

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Definitions:

ATP

Adenosine triphosphate, a molecule that stores and transfers energy within cells, crucial for muscle contraction, nerve impulse propagation, and chemical synthesis.

Active Transport

A cellular process that uses energy to move molecules across cell membranes against their concentration gradient.

Facilitated Diffusion

A process of passive transport, aided by transport proteins, that allows molecules to cross the cellular membrane along the concentration gradient without energy expenditure.

Concentration Gradient

The gradual difference in the concentration of solutes in a solution between two regions, leading to the movement of substances from high to low concentration.