How is mRNA produced in the nucleus of a cell?

Genes in DNA encode protein molecules. The first step of expressing a gene is transferring the information in DNA to a messenger RNA (mRNA) molecule, by a process called transcription. DNA Helicase unwinds the DNA double helix by breaking the hydrogen bonds down the centre of the strand. One strand of the DNA acts a template for complementary base-pairing. RNA nucleotides are attracted to the exposed bases and they are joined together by RNA polymerase. The resulting pre-mRNA molecule is then spliced to remove introns, and the resulting single stranded mRNA can then be used for translation into a protein molecule.

Answered by Jamie T. Biology tutor

40216 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Draw a graph on the effect of an increase in temperature on the rate of an enzyme controlled reaction. Explain the shape of the curve and suggest why the temperature of a mammal is maintained just below the optimum temperature.


Describe the structure of human DNA (4 marks)


What are the key features of intensive rearing?


How does a gene mutation alter a protein?


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