One DNA molecule has:
the first strand: A = 1/10, T =2/10, C= 3/10, G= 4/10 of total nucleotides for this strand. The total hydrogen bonds equals to 3240. Calculate (a) each type of nucleotide and its length in mm. (b) If each gene has 120 total nucleotides. How many genes are there?

Question

One DNA molecule has:
the first strand: A = 1/10, T =2/10,  C= 3/10,  G= 4/10 of total nucleotides for this strand. The total hydrogen bonds equals to 3240. Calculate (a) each type of nucleotide and its length in mm. (b) If each gene has 120 total nucleotides.  How many genes are there?

anonymous · Answer

Base pairing A-T and C-G.  AG are purines CT are pyrimidines.  When looking at A-T and C-G pairing, one has 2 hydrogen bonds and the other has 3.  Combining all of that info should get you pretty far along in the question.

Only real problem I see is the gene crap.  I assume no introns? If that is not the case it is impossible to determine how many genes there will be.