Nucleotides and DNA replication 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: wilby99Created on: 14-12-15 18:18 A phosphate, sugar and base make up a... Nucleotide 1 of 18 DNA always contains the sugar... Deoxyribose 2 of 18 RNA always contains the sugar... Ribose 3 of 18 Cytosine, thymine and uracil are all... Pyrimadines 4 of 18 Adenine and guanine are... Purines 5 of 18 The reaction that takes place to join many nucleotides into a polynucleotide chain... Condensation 6 of 18 Adenine always pairs with Thymine 7 of 18 Cytosine always pairs with Guanine 8 of 18 The amount of hydrogen bonds between bases A &T Two 9 of 18 The amount of hydrogen bonds between C & G Three 10 of 18 In DNA replication: the enzyme that "unzips" the doublr helix Helacase 11 of 18 In DNA replication: the two unzipped strands act as ...... on which new strands can be built Templates 12 of 18 In DNA replication:the enzyme that joins the free nucleotides together to form a matching polynucleotide chain Polymerase 13 of 18 The new DNA d-helixes each contain a strand of the old polynucleotide chain and a new strand this means that replication is said to be Semiconservative 14 of 18 Transcription:what attaches to the DNA double helix at the beginning of the gene? RNA polymerase 15 of 18 Transcription: RNA polymerase lines up free ....... along the DNA template which then form the new mRNA strand Nucleotides 16 of 18 Transcription: when the mRNa has separated from it, the hydrogen bonds between what parts of the DNA re-form? uncoiled strands 17 of 18 when mRNA polymerase reaches a .......... it stops making mRNA and this move out of the nuclear pores stop codon 18 of 18
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