Cell Cycle Test Flashcards Preview

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Flashcards in Cell Cycle Test Deck (24):
1

Chromosome

highly organzised DNA and proteins

2

Homologous Chromosomes

Pair of chromosomes made up of two homologs. They have corresponding DNA sequences and come from separate parents; one homolog comes from the mother and the other comes from the father (line up during meiosis)

3

Chromatin

loosely organized DNA and proteins

4

nucleosome

DNA wrapped around histones

5

histon

DNA binding proteins

6

centromere

connects the 2 chromatids

7

Cell cycle

-Sequence of events in a cell's life
-Includes interphase, mitosis, and cytokinesis

8

binary fission

-method by which bacteria reproduces
-circular DNA is replicated- cell splits in 2 identical cells, each contains an exact copy of the original cell's DNA

9

interphase

Includes G1, G2, and S stages:
G1- organelles are duplicated
S (synthesis)- DNA is replicated
G2- cell prepares for cell division

10

Cell cycle control

cells control where of when it undergos cell division

11

cancer

disease caused by normal cells changing so they grow in an uncontrollable way

12

cytokinesis

-cytoplasm begins to pinch in
-edges of cell pinches and cytoplasm divides
-two identical cells are produced

13

prophase

-centrioles form and begin moving to opposite poles of the cell
-nuclear envelope begins to break down
-chromatin condenses to form chromosomes

14

metaphase

-spindle fibers attach to the centromere of the chromosomes
-chromosomes line up in the middle of the cell

15

anaphase

-chromosome move toward opposite poles of the cell
-spindle fibers begin to shorten and split the chromosomes at the centromere

16

telophase

-spindle fibers disappear
-2 nuclear envelopes reappear
-chromosomes are at opposite poles

17

cell plate

a double membrane across the midline of a dividing plant cell, between which the new cell wall forms during cytokinesis

18

cleavage furrow

the first sign of cytokinesis during cell division in an animal cell; a shallow groove in the cell surface near the old metaphase plate

19

tumor

uncontrolled lump of growth

20

benign tumor

a tumor that does not metastasize

21

malignant tumor

a tumor that does metastasize

22

metasasis

the spread of cancer to a new part of the body

23

anchorage-dependence

cells must be in contact with an anchor (tissue within the body) to divide

24

density-dependence inhibition

cell stops dividing when the area becomes too dense