Molecular structure of DNA 0.0 / 5 ? BiologydnaOtherNone Created by: une-meduseCreated on: 05-04-14 15:52 The numbering of nucleic acids starts where? 3oclock 1 of 28 The major difference between DNA and RNA is in the sugars: H on C2 for DNA and OH on C2 on RNA 2 of 28 When forming the DNA backbone, the phosphate is linked to which carbons on the sugars? 5 and 3 3 of 28 The bonds of the sugar phosphate backbone of DNA are called Phosphodiester 4 of 28 The 3' end of DNA terminates with _____ -OH 5 of 28 The 5' end of DNA terminates with _______ Phosphate group 6 of 28 The first essentially correct structure of DNA was proposed in 1953 by James Watson and Francis Crick 7 of 28 The B form of DNA is _______ handed Right 8 of 28 ____________ is any difference in DNA, no matter how detected, whose pattern of transmission from generation to generation can be tracked A genetic marker 9 of 28 Genetic markers are detected by analysis of the DNA and are often called DNA markers 10 of 28 Bases with a double ring structure are Purines 11 of 28 Bases with a single ring structure are Pyrimidines 12 of 28 Purine bases (double) are A and G 13 of 28 Pyrimidine (single) bases are T and C 14 of 28 A base and sugar is a Nucleoside 15 of 28 A base, sugar and phosphate is Nucleotide 16 of 28 From Chargraff's rules: the amount of adenine equals that of _________ Thymine 17 of 28 From Chargraff's rules: the amount of guanine equals that of _______ Cytosine 18 of 28 From Chargraff's rules: the amount of purine bases equals that of ________ Pyrimidine bases 19 of 28 In each chain of B form DNA, there is a complete turn every ______ 34Å 20 of 28 The bases are spaced at _________ in B form DNA 3.4Å 21 of 28 The bases stack closely to exclude the maximum amount of water possible (they're hydrophobic) this is known as Base stacking 22 of 28 When the strands of DNA twist to the left, what form of DNA is this? Z form 23 of 28 Depending on conditions, DNA can form more than ___ slightly different variants of right handed helices 20 24 of 28 What is responsible for the UV absorption in DNA Delocalised electrons 25 of 28 G DNA has how many strands? 4 26 of 28 G DNA is due to the in guanine rich regions of DNA Hoogsteen hydrogen bonding 27 of 28 A DNA is similar to ____ DNA, although it has slightly more compact helices B 28 of 28
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