2.3 DNA Replication Flashcards Preview

A Level Biology > 2.3 DNA Replication > Flashcards

Flashcards in 2.3 DNA Replication Deck (14):
1

Why does cell division occur?

The to produce more cells needed for growth and repair
E.g. Of epithelial tissues

2

What is produced due to cell division?

2 daughter cells that are genetically identical

3

What are epithelial tissues?

Skin cells

4

What is DNA replication controlled by?

Enzymes

5

What does DNA helicade do?

It unzips the DNA strands

6

How does DNA helicase work?

It travels along the backbone catalysing reactions that break the bonds between complimentary base pairs

7

What do free nucleotides pair with?

Exposed bases

8

What does DNA polymerase do?

Catalyses the formation of bonds between nucleotides

9

What bonds form between nucleotides?

PHOSPHODIESTER

10

What does DNA polymerase travel?

3 to 5 prime

11

What strand of DNA is continuously replicated?

The leading strand

12

What is DNA made up of?

Repeating units of nucleotides so it is a polynucleotide

13

What is the laggin strand?

The strand replicated 5 prime to 3 prime

14

How is the laggin strand replicated?

In short strands called okasaki fragments

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