Compare and contrast dna and rna

RNA, however, is found throughout the cell. The sugar portion of RNA is Ribose. Eukaryotic DNA material. Also, RNA is found in prokaryoteswhich are believed to precede eukaryotes.

Four different nitrogenous bases: adenine, guanine, cytosine, and uracil. DNA is found in the nucleus of a cell and in mitochondria. DNA can be damaged by exposure to ultra-violet rays.

structural and functional difference between dna and rna

RNA on its own can act as a catalyst for certain chemical reactions. There is no proportionality in between the number of Purine and Pyrimidine bases.

Structure of ribose in RNA Structure of deoxyribose in DNA Functions[ edit ] DNA is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. Each carbon binds to a hydrogen atom and a hydroxyl group, which is a molecule of one oxygen and one hydrogen atom.

The asymmetric ends of DNA strands are referred to as the 5' five prime and 3' three prime ends. The tight structure of a DNA double helix makes it less vulnerable to enzyme action, but RNA is more resistant to ultraviolet rays.

Compare and contrast dna and rna

Nitrogen-containing molecules, called nucleotide bases, hang off each sugar unit. Each carbon binds to a hydrogen atom and a hydroxyl group, which is a molecule of one oxygen and one hydrogen atom. In contrast, ribose sugar in RNA is more reactive by means C- OH bonds since, it is not stable in alkaline conditions. In DNA, the bases of each strand bind to the bases on the other strand, forming the double-helix structure. RNA usually is a single-strand helix consisting of shorter chains of nucleotides. The small grooves in the helix also serve as protection, providing minimal space for enzymes to attach. DNA is susceptible to UV damage. Hydrogen bonds are formed between complementary nitrogen bases of the opposite strands A-T, C-G. DNA plays no role in translation. This type of RNA is found in some viruses. It has smaller grooves where the damaging enzyme can attach which makes it harder for the enzyme to attack DNA; RNA, on the other hand, has larger grooves which makes it easier to be attacked by enzymes. Purine and Pyrimidine bases are equal in number.
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DNA versus RNA