Describe the stages in DNA transcription and translation
DNA is unziped by DNA helicase. RNA polymerase catalyses the formation of a complementary strand of pre-mRNA, using the non-coding strand of DNA as a template. The pre-mRNA contains non-coding regions (introns) which are removed through splicing to form mature-mRNA. As the mRNA is single stranded, it can leave the nucleus via the nuclear pores and bind to a ribosome on the rough endoplasmic retIculum (rER). Starting with the 'start' codon, each codon on the mRNA sequence is read in order. The amino acid which corresponds with each codon is carried by a tRNA to the ribosome. Adjacent amino acids form peptide bonds which results in the formation of a long chain of amino acids, or a polypeptide.
IN
Related Biology A Level answers
All answers ▸Which organelle in the cell is responsible for supporting its 3D structure?
Effect of non-competitive inhibitor (on enzyme activity) on enzyme catalysed reaction
What is an atheroma and how do they form?
Describe the steps following the arrival of an action potential to the pre-synaptic bulb allowing for transmission of a signal across a synapse.