UNIT 1-6 Review

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Active Transport

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The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

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Passive Transport

Back

The movement of molecules across a cell membrane without the use of energy, from a region of higher concentration to a region of lower concentration.

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Gene Expression

Back

The process by which information from a gene is used to synthesize a functional gene product, often a protein.

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Fur Color Change in Arctic Foxes

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Gene expression is regulated by temperature, leading to changes in fur color.

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Cancer

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A disease characterized by uncontrolled and unregulated cell division.

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Translation

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The process of converting mRNA into a sequence of amino acids to form a protein.

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Transcription

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The process of synthesizing mRNA from a DNA template.

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Concentration Gradient

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A difference in the concentration of a substance across a space, which drives the movement of substances in and out of cells.

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Cell Membrane

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A biological membrane that separates and protects the interior of all cells from the outside environment.

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Amino Acids

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The building blocks of proteins, which are linked together by peptide bonds.