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Science
For TEAS test
28
Science
Undergraduate 1
08/07/2016

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Term
Phases of Mitosis
Definition
Prophase, metaphase, anaphase, telophase
Term
prophase
Definition
spindle fibers form and the centrioles move to opposite sides of the cell. The nuclear membrane disappears.
Term
metaphase
Definition
chromosomes align midway along spindle fibers
Term
anaphase
Definition
chromosomes begin to separate from their daughters. Cytokinesis begins.
Term
telophase
Definition
identical sets of chromosomes are at opposite ends of the cell. Spindle fibers disappear, nuclear membranes reappear and cytokinesis completes.
Term
meiosis
Definition
process by which gametes reduce their DNA content
Term
gamete
Definition
cells that form a new organism via sexual reproduction
Term
diploid cells
Definition
cells that contain two sets of chromosomes
Term
haploid cells
Definition
cells that contain a single set of chromosomes
Term
homologous chromosome
Definition
twin chromosomes in a diploid cell
Term
chromatid
Definition
one of a pair of newly duplicated chromosomes; pair of matching "sister" chromatids make up the duplicated chromosome
Term
metaphase plate
Definition
disc extending across the nuclear area on which the chromosomes are found at metaphase just prior to the separation of the chromosomes during mitosis
Term
cytokinesis
Definition
separates two sets of chromosomes into different cells
Term
prokaryotic cell
Definition
bacterial cell; most basic of cell types. No nucleus. No organelles.
Term
eukaryotic cell
Definition
animal/plant cell; Has nucleus. Has organelles. Contains endoplasmic reticulum (ER) and Golgi apparatus.
Term
cytoplasm
Definition
rich protein fluid with gel-like consistency that houses organelles
Term
organelles
Definition
tiny organs in cells
Term
nucleoid
Definition
condensed DNA of cell
Term
plasmid
Definition
small, circular portions of DNA not associated with nucleoid
Term
ribosomes
Definition
manufacture proteins for the cell from RNA messages; small bodies that free float in cytoplasm
Term
flagella
Definition
long and whip-like projections from cell that help cell movement
Term
endoplasmic reticulum (ER)
Definition
tubular transport network in cell. Two types: smooth and rough.
Term
rough endoplasmic reticulum
Definition
studded with ribosomes
Term
Golgi apparatus
Definition
refines and sorts proteins, and prepares them for transport to other parts of the cell; works hand-in-hand with endoplasmic reticulum
Term
vesicles
Definition
small, membrane-bounded sacs within cytoplasm; three common types: vacuole, lysosome and peroxisome
Term
vacuole
Definition
basic storage unit of the cell
Term
lysosome
Definition
contains digestive enzymes capable of disposing of cellular debris
Term
peroxisome
Definition
rids body of toxic components, such as hydrogen peroxide
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