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AQA Biology 11.1 replication of DNA
Flashcards do conjunto (14)
- 1what is nuclear division?the process by which the nucleus divides
- 2what are the two types of nuclear division?-meiosis
-mitosis - 3what is cell division?follows nuclear division and is the process where the entire cell divides
- 4what must happen before a nucleus can divide?DNA must be replicated
- 5why must the DNA replicate?so all the daughter cells have the genetic info to produce the enzymes and other proteins they need.
- 6which model is universally accepted for DNA replication?semi-conservative replication
- 7how many requirements are there for DNA replication to occur?4
- 8what are the requirements?-the 4 types of nucleotide, each with their bases of A,G,C and T must be present
-both strands of DNA must act as a template for the attachment of these nucleotides
-DNA polymerase (enzyme) is needed to catalyse the reaction
-a source of chemical energy - 9which enzyme breaks up the hydrogen bonds linking the base pairs?DNA helicase
- 10what does DNA helicase cause the double helix to do?separate into its two strands and unwinds
- 11what then happens to each exposed polynucleotide?acts as a template which attracts complementary nucleotides
- 12what is used to activate the nucleotides?energy - ATP
- 13what joins the activated nucleotides together?the enzyme DNA polymerase
- 14what does each new DNA molecule contain?one original strand and one new strand.
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- AS - Level AS Biology (unit 2 - 11. the cell cycle) FlashCards sobre AQA Biology 11.1 replication of DNA, criado por Charlotte Hewson em 26-03-2015.
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- Charlotte Hewson
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