Cell Biology Terms: Prokaryotes, Eukaryotes, Cell Cycle, Meiosis, and Mitosis, Quizzes of Genetics

Definitions for various terms related to cell biology, including prokaryotes and eukaryotes, the cell cycle, meiosis, and mitosis. Topics covered include chromosomes, homologous pairs, diploid and haploid cells, telomeres, origins of replication, sister chromatids, and the stages of the cell cycle. Useful for students studying cell biology, genetics, or molecular biology.

Typology: Quizzes

2010/2011

Uploaded on 01/28/2011

jecohen
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TERM 1
prokaryote
DEFINITION 1
unicellular organism with a simple cell structure
TERM 2
eukaryote
DEFINITION 2
has a compartmentalized cell structure having components
bounded by intracellular membranes; multi- or uni- cellular
TERM 3
archaea
DEFINITION 3
ancient bacteria, single-celled
TERM 4
eubacteria
DEFINITION 4
true bacteria, single-celled
TERM 5
nucleus
DEFINITION 5
genetic material surrounded by nuclear envelope
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prokaryote

unicellular organism with a simple cell structure

TERM 2

eukaryote

DEFINITION 2

has a compartmentalized cell structure having components

bounded by intracellular membranes; multi- or uni- cellular

TERM 3

archaea

DEFINITION 3

ancient bacteria, single-celled

TERM 4

eubacteria

DEFINITION 4

true bacteria, single-celled

TERM 5

nucleus

DEFINITION 5

genetic material surrounded by nuclear envelope

histones

proteins that help in the winding of DNA (to make

chromosomes)

TERM 7

chromatin

DEFINITION 7

complex of DNA and histone proteins (the stuff of eukaryotic

chromosomes)

TERM 8

homologous pair

DEFINITION 8

the chromosomes of this are usually alike in structure and

size, and each carries genetic information for the same set of

hereditary characteristics

TERM 9

diploid

DEFINITION 9

cells that carry 2 sets of genetic information

TERM 10

haploid

DEFINITION 10

cells with a single set of chromosomes

interphase

phase between cell divisions where cell grows, develops, and

prepares for division

TERM 17

M phase

DEFINITION 17

period of active cell division (mitotic phase)

TERM 18

mitosis

DEFINITION 18

process of nuclear division

TERM 19

cytokinesis

DEFINITION 19

cytoplasmic division

TERM 20

prophase

DEFINITION 20

chromosomes condense

prometaphase

disintegration of the nuclear membrane

TERM 22

metaphase

DEFINITION 22

chromosomes arrange one metaphase plate between the 2

centrosomes

TERM 23

anaphase

DEFINITION 23

sister chromatids separate and move toward opposite

spindle poles

TERM 24

telophase

DEFINITION 24

arrival of the chromosomes at the spindle poles

TERM 25

synapsis

DEFINITION 25

very close pairing association of homologous chromosomes

during zygotene (P1)

meiosis

leads to gametes, where chromosome number is halved

TERM 32

fertilization

DEFINITION 32

two haploid gametes fuse and restore chromosome number

to its original diploid value

TERM 33

recombination

DEFINITION 33

creates new combinations of alleles on a chromatid

TERM 34

cohesin

DEFINITION 34

protein that holds chromatids together; key to behavior of

chromosomes in mitosis and meiosis

TERM 35

spermatogenesis

DEFINITION 35

production of gametes in a male animal, takes place in the

testes

spermatogonia

diploid cells, the result of mitotic germ cell division

TERM 37

primary spermatocyte

DEFINITION 37

a spermatogonium that initiates meiosis and enters prophase

I

TERM 38

secondary spermatocyte

DEFINITION 38

result of the primary spermatocyte completing meiosis I; two

haploid cells that undergo meiosis II

TERM 39

spermatids

DEFINITION 39

haploid product of secondary spermatocyte through meiosis

II

TERM 40

oogenesis

DEFINITION 40

production of gametes in a female animal

second polar body

result of meiosis II; smaller body/less cytoplasm

TERM 47

microsporocyte

DEFINITION 47

diploid reproductive cells in male plants

TERM 48

microspores

DEFINITION 48

result of microsporocyte meiosis; haploid

TERM 49

megasporocyte

DEFINITION 49

female diploid gametes

TERM 50

megaspore

DEFINITION 50

result of megasporcyte meiosis; haploid