DNA Replication Flashcards Preview

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Flashcards in DNA Replication Deck (14)
1

2 ways DNA is used

1. template to copy itself during DNA replication
2. converts to RNA (transcription)/ RNA used to make protein (translation)

2

interphase

non dividing stage of cell cycle

3

3 stages of interphase

G1- cells produced by cell division grow and prepare for DNA replication
S- synthesis; DNA replicated
G2 cells prepare to divide

4

DNA monomer

nucleotide

5

3 parts of nucleotide

1. deoxyribose sugar
2. phosphate group
3. nitrogen base

6

4 nitrogen bases in DNA

adenine, thymine, cytosine, guanine

7

semiconservative replication

each double strand has 1 old strand and one new

8

DNA helicase

unwinds and separates strands of double helix

9

DNA polymerase

1. finds origin of replication
2. forms replication bubble and moves forks along template strand
3. adds nucleotides to new DNA strand

10

DNA ligase

connects new DNA pieces together into one strand

11

leading strand

oriented properly for enzyme to read
synthesized continuously

12

lagging strand

oriented backward
synthesized in Okazaki fragments, joined by DNA ligase

13

chromatin

invisible, non dividing form of DNA

14

chromosomes

visible DNA
DNA twists around histones, becomes shorter and thicker, eventually visible