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cell parts
parts of the cell
24
Biology
12th Grade
10/09/2012

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Term
cytoplasm
Definition
the entire contents of the cell, exclusive of the nucleus and bounded by the plasma membrane
Term
chromosomes
Definition
found in all cells that carry genes as DNA
Term
ribosomes
Definition
small organelles that make protein according to genetic instruction.
Term
eukaryotic cells
Definition
1. hold their DNA in a nucleus
2. Have membrane-bound organelles
Term
Prokaryotic cells
Definition
1. Hold their DNA in a nucleoid which doesn't have a membrane to separate the DNA from the rest of the cell
Term
nucleus
Definition
the chromosome containing organelle of a eukaryotic cell. One of two organelles that have two membranes
Term
nuclear envelope
Definition
encloses the nucleus and separates its contents from the cytoplasm
Term
pore complex
Definition
a hole in the nuclear envelope that regulates the exit and entry of large macromolecules and particles
Term
nuclear lamina
Definition
inner membrane of the nuclear envelope
Term
chromosomes
Definition
structures that carry genetic information. Human cells have 46. Sperm and eggs have 23
Term
chromatin
Definition
a complex of protein and DNA that makes up a eukaryotic chromosome. when the cell isn't dividing it's uncoiled
Term
nucleolus
Definition
a specialized structure in the nucleus, formed from various chromosomes and active in the synthesis of ribosomes
Term
ribosomes
Definition
particles made of ribosomal RNA and protein that carry out protein synthesis
Term
free ribosomes
Definition
ribosomes found in the cytosol
Term
bound ribosome
Definition
attached to the end of endoplasmic reticulum or the nuclear envelope that make proteins that get put in membranes, are secreted, are put in lysosomes
Term
cytosol
Definition
the semifluid portion of the cytoplasm
Term
lysosome
Definition
sac filled with digestive chemicals
Term
mitochondria
Definition
structures that convert nutrients to energy
Term
centriole
Definition
structure that organizes motion of chromosomes.
Term
endoplasmic reticulum
Definition
passageways where chemicals are made
Term
vacuole
Definition
sac that stores water, nutrients, or waste products
Term
plasma membrane
Definition
membrane that surrounds and protects the cell
Term
golgi apparatus
Definition
stack of membranes that packages chemicals
Term
vesicle
Definition
package created by the Golgi Apparatus
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