In a double helix there is a complete turn every 3.4 nm of 10 nucleotides. The human genome contains approx 3 billion nucleotides. Calculate how long an average humans cells DNA would be if the structure is unwound. Calculate how many complete turns would exist in this molecule

Question

shrutipande9 · Answer

it is simple cross multiplication
10 nucleotides-----3.4nm
3billion nucleotides----?
and 10 nucleotides-----1 turn
so 3billion nucleotides----?

anonymous · Answer

i dont understand much on how you layed that question out @shrutipande9

shrutipande9 · Answer

okay...see
u need the length of total DNA correct?
if 10 nucleotides correspond to 3.4 nm
then 3 billion nucletides correspond to what?

anonymous · Answer

do i multiply 3.4 by 3 billion?

shrutipande9 · Answer

and den divide by 10

anonymous · Answer

okay i got 102, 000, 0000

shrutipande9 · Answer

102,000,0000nm is the length of dna..:D

shrutipande9 · Answer

same thing u do for no of turns

anonymous · Answer

so then i do 10x1=10 divided by 3 billion? @shrutipande9