F222 - 2.1.1.1 - DNA 3.0 / 5 based on 1 rating ? Human BiologyDNA, genetics and evolutionASOCR Created by: hayley taylorCreated on: 24-11-12 17:24 what are the 3 components of a nucleotide phosphate, five carbon sugar, organic base 1 of 23 What does DNA store? genetic information 2 of 23 Where do you find DNA? chromosomes 3 of 23 where are chromosomes? in the nucleus of the cell 4 of 23 What are the two purine bases adenine and guanine 5 of 23 what are the two pyrimidine bases? thymine and cytosine 6 of 23 What reaction joins the nucleotides? condensation 7 of 23 More than one nucleotide joined together forms a? polynucleotide 8 of 23 How many polynucleotides make a strand of DNA? two 9 of 23 Where do the bonds form to join two polynucleotide chains? between the bases 10 of 23 What bonds form between the bases of a DNA strand? hydrogen bonds 11 of 23 What does Adenine pair with in a DNA strand? thymine 12 of 23 What base pairs with Cytosine? Guanine 13 of 23 How many hydrogen bonds form between the base Cytosine and Guanine? three 14 of 23 How many bonds form between the base Adenine and Thymine? two 15 of 23 The DNA bases only pair with specific bases, what is this also known as? complimentary base-pairing 16 of 23 What shape is DNA? double helix 17 of 23 What is the way the DNA replicates called? semi-conservative replication 18 of 23 In which stage of the cell cycle dose semi-conservative replication of DNA happen? The S (synthesis) phase 19 of 23 What cases the hydrogen bonds to break during the unwinding of the DNA? the enzyme DNA helicase 20 of 23 What happens to the exposed bases of the DNA? new nucleotides pair up according to the complementary base-pairing rules 21 of 23 What enzyme pairs up the new nucleotides? DNA polymerase 22 of 23 What bond forms between the fire carbon sugar and the phospate of the next? phosphodiester 23 of 23
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