why RNA need to be single strand?

Answer 1

RNA serves as a template for making DNA. The single strand allows another strand to attach to it to form a DNA strand.

Answer 2

Evolutionarily RNA has always been single stranded because RNA synthesis (in all forms of life) involves the use of the enzyme RNA polymerase. The fidelity of this enzyme is very low. Thus the RNA synthesis is prone to very high rates of error, which leads to mutations. If RNA was double stranded the rate of mutation is just gonna increase, as more strands are being produced. And another reason is that energitically RNA is more stable in single stranded comformation than the double stranded conformation. Thats why most forms of life do not have RNA as the genetic material and RNA is not double stranded.

Answer 3

RNA is a molecule ment to copy the DNA. Once it got an "impression" from one side (one strand) of the DNA, it detaches from the the DNA (which recombines with its other strand) so that its now exposed pairs can combine with elemental T, C, G or A floating around, that can then assemble another DNA (or some needed proteins). Having a second strand to cover up the RAN would prevent it from having a "working" face.

Answer 4

ACtually at Viruses the RNA is not single strand...


but usually it is as said 'cause of its job on producing the information made in DNA.

and so it takes only 1 part and it will need to couple again when it gets to the Ribosoms.

but just to let know.. its not always single strand...

Answer 5

Evolution.

Answer 6

it's less evolutionary advanced than DNA,

Answer 7

The way God designed it.