Dna exist in double standard form where as rna is made a single stranded molecule what is the likely reason for dna ping double stranded
Answers
Answer:
DNA is double helix and RNA is single helix because of their functions inside the cell. DNA is meant to store genetic information for the tenure of the cell's life and also preserve it for the next generation of cells when it divides
Answer:
To begin with, the nitrogenous base, rather than the pentose sugar or the phosphate residues, is the 'information' element of DNA. This crucial section of a single-stranded molecule would be exposed to the cellular environment, making it more susceptible to being modified by the numerous chemicals present. However, as the two nitrogenous bases are trapped in a double-stranded arrangement, facing each other in the molecule's center. This serves to protect them from mutations.
Moreover, having two complementary strands facing each other essentially implies having two identical copies of the same thing adjacent to each other. This makes it possible to proofread.
dsRNA on the hand has a lower stability than dsDNA. The presence of a hydroxyl group at the 2' position of the ribose sugar is a key structural property of RNA that separates it from DNA. Because of the presence of this functional group, the helix takes on the A-form geometry rather than the B-form that is most typically seen in DNA. As a result, the main groove is very deep and narrow, whereas the minor groove is shallow and wide.
Most importantly, the presence of dsRNA in biological systems indicates the presence of viruses and active transposable elements, therefore ssRNA is a simple means for the host cell to detect foreign elements.