Discuss the differences between DNA and RNA. (4 pts)

Although DNA and RNA are practically identical, there are a few key differences between the two molecules. Function: DNA stores long-term genetic information and transmits genetic information to make new organisms.RNA is used to transfer the genetic code to make proteins, from the nucleus to the ribosomes. Structure: DNA is a double stranded molecule, arranged in a double-helix structure. Whereas RNA is a single stranded molecule. Both are made up of nucleotides; each nucleotide contains a nitrogenous base, a 5-carbon sugar and a phosphate.Sugar: DNA contains a deoxyribose sugar, it has one less hydroxyl group than the ribose sugar. RNA contains a ribose sugar. Bases: DNA contains A T C and G (Adenine, Thymine, Cytosine and Guanine). RNA contains A C G and U (Adenine, Cytosine, Guanine and Uracil). In RNA Thymine is replaced by Uracil.

Answered by Sophie K. Biology tutor

1519 Views

See similar Biology IB tutors

Related Biology IB answers

All answers ▸

Compare and contrast a food chain and a food web.


Membranes of pre-synaptic and post-synaptic neurons play an important role in transmission of nerve impulses. Explain the principles of synaptic transmission. (8marks)


Explain the sliding filament model of skeletal muscle contraction


Meselson & Stahl grew E. coli cells in a dense N15 nitrogen medium, then transferred to a lighter N14 nitrogen medium. Describe the observations of their experiment (until the third generation) and use it to explain the mechanism of DNA replication.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences