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Chapter 7 Cells - Vocabulary and Section 1 Review Questions
Vocabulary
7
Biology
9th Grade
11/13/2012

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Term
cell membrane
Definition
a phospholipid layer that covers a cell’s surface and acts as a barrier between the inside of a cell and the cell’s environment
Term
cytoplasm
Definition
the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
Term
ribosome
Definition
a cell organelle composed of RNA and protein; the site of protein synthesis
Term
prokaryote
Definition
a single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria
Term
eukaryote
Definition
an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include protists, animals, plants, and fungi but not archaea or bacteria
Term
nucleus
Definition
in a eukaryotic cell, a membrane-bound organelle that contains the cell’s DNA and that has a role in processes such as growth, metabolism, and reproduction
Term
organelle
Definition
one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function
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