Biology Terms Flashcards

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Prokaryotic cell

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A unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelles.

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Concentration Gradient

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The amount of solutes compared to a different area (inside or outside of the cell)

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Cell Membrane

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

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Capsid

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The outside protein shell of a virus, enclosing its genetic material.

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Lytic

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A type of viral replication cycle resulting in the destruction of the host cell and the release of new virus particles.

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Nucleus

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A membrane-bound organelle found in eukaryotic cells that contains the genetic material.

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S phase

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The part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase in interphase.

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High Concentration

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An area where the concentration of a particular substance is greater than in other areas.

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Solutes

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Substances dissolved in a liquid to form a solution.

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Active Transport

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