Can you explain the process of DNA transcription?

The first stage of gene expression is DNA transcription. Transcription is the formation of single stranded mRNA from double stranded DNA. During transcription, the enzyme DNA helicase unwinds the double helix by breaking the hydrogen bonds between the complementary DNA base pairs. Free RNA nucleotides are attracted to exposed complementary DNA bases. These RNA nucleotides are bonded by RNA polymerase to form mRNA. This mRNA leaves the nucleus, through nuclear pores, where it is attracted to the ribosome in the cytoplasm. 

AM
Answered by Ashley M. Biology tutor

3825 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

How is meiosis different to mitosis?


Describe how insulin is secreted from beta cells in the Islets of Langerhans


What is the process of DNA replication?


Draw a diagram of a human cell, include; the Nucleus, the Golgi Apparatus, Lysosomes, Ribosomes and Mitochondria, annotating your diagram with the general functions of each component and of the cell membrane.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning