The Cell Lecture 3

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  • Created by: saraht83
  • Created on: 01-05-16 15:44
Prokaryotes divide by...
fission
1 of 14
Cytokinesis
separates one cell into two
2 of 14
Eukaryotes divide by...
mitosis or meiosis
3 of 14
Chromosomes
in the nucleus, DNA molecules packaged into thread-like structures, not visible unless cell is dividing
4 of 14
Centromere
constriction point, divides chromosome into two 'arms'
5 of 14
Short arm
p arm
6 of 14
Long arm
q arm
7 of 14
Histones
proteins, provide energy to compact chromosomal DNA, family of small, positively charged proteins, H1, H2A, H2B, H3 + H4
8 of 14
DNA-protein complex is called...
chromatin
9 of 14
DNA
negatively charged
10 of 14
Nucleosome
basic repeating structural and functional unit of chromatin
11 of 14
Chromatin
mix of DNA, histones + other proteins that make up chromosomes, divided between heterochromatin (condensed) + euchromatic (extended)
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Functions of chromatin
package DNA, strengthen DNA, control gene expression + DNA replication
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Transcription and replication
require DNA strands to separate for template
14 of 14

Other cards in this set

Card 2

Front

separates one cell into two

Back

Cytokinesis

Card 3

Front

mitosis or meiosis

Back

Preview of the back of card 3

Card 4

Front

in the nucleus, DNA molecules packaged into thread-like structures, not visible unless cell is dividing

Back

Preview of the back of card 4

Card 5

Front

constriction point, divides chromosome into two 'arms'

Back

Preview of the back of card 5
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