1) (1 pt) A molecule of double-stranded DNA has a pyrimidine: purine ratio of 4:1 in one strand. What is the pyrimidine: purine ratio in the other strand? 2) (1 pt) A biochemist tells you that the G content of a DNA molecule is 75%. Is that possible? Explain. 3) (1 pt) If thymine (T) makes up 20% of the bases in a double-stranded DNA molecule, what percentage of the bases must be cytosine (C)? 4) (1 pt) A virus has a 2000 bp DNA genome. The [G+C] content is 60%. a. How many H-bonds occur between the two DNA strands? b. What are the relative proportions for all 4 nucleotides?
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Step 1: In a double-stranded DNA molecule, if one strand has a pyrimidine:purine ratio of 4:1, then the other strand will have a pyrimidine:purine ratio of 1:4. Show more…
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