Dna Rn Double Helix Structure

1335 Words Oct 12th, 2015 6 Pages
DNA RNA
Double helix structure made of two DNA strands Made up of a single strand
In DNA adenine base pairs with thymine
In RNA adenine base pairs with uracil
There is only one type of DNA There are three types of RNA; messenger RNA (mRNA), ribosomal RNA (rRNA) and transfer RNA (tRNA)

Made up of monomers called nucleotides, which is made up of three parts; pentose sugar, nitrogenous base and a phosphate group Made up of monomers called nucleotides, which is made up of three parts; pentose sugar, nitrogenous base and a phosphate group
Contains purine and pyrimidine nitrogenous bases Contains purine and pyrimidine nitrogenous bases
DNA is a nucleic acid (a molecule which is made up of a long chain of nucleotides) RNA is a nucleic acid (a molecule which is made up of a long chain of nucleotides)

b) A table to show the differences in three types of RNA’s mRNA tRNA rRNA
Single stranded straight chain molecule Has a clover shaped loop structure It has a large ribosomal subunit and a small ribosomal subunit
Its function is to carry the genetic code for proteins that has been copied from the gene on the DNA strand. Its function is to help put together amino acids into a polypeptide chain Its function is to catalyse the assembling of amino acids into a polypeptide chain which is then made into a protein
It can be found in the nucleus and cytoplasm It can be found in the cytoplasm
The mRNA’s codons are complimentary to the DNA triplets The tRNA’s anticodons…
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