Transcription

what are the two stages of protein synthesis?

Transcription and Translation

What are Stages 1 -3 in transcriptions?

1= DNA polymerase moves along the DNA strand, unwinding the double helix. 2= hydrogen bonds break between the bases on the original DNA, unzipping the DNA. 3= As RNA polymerase breaks the bonds free nucleotides found in the nucleus join with their complimentary base on the DNA strand.

Stages 4-5 of transcriptions?

4= the RNA nucleotide backbone forms on the newly synthesised MRNA strand. This strand is called primary transcription

stages 6 of transcriptions?

the primary MRNA is now ready to go through a process called splicing before exiting the nucleus

what are the three roles of RNA polymerase?

1= it moves along the DNA strand, unwinding the helix during transcription. 2= it also breaks the hydrogen bonds between the bases. 3= RNA polymerase synthesis a primary transcript of MRNA, it adds free RNA nucleotides by a complimentary base parings on exposed DNA strands.

what is transcription?

a complimentary copy of DNA code created by mRNA.

what does primary transcriptions contain?

coding and non coding transcriptions

what are introns?

non coding regions(in the nucleus)

what are exons?

coding regions (exiting the nucleus)

what are coding regions?

contains information’s needed to make a protein

what are maturing transcription?

removing the introns and splicing the exons

what is splicing?

joining together the exons

the order of exons in the process of splicing..?

never unchanges

tRNA is a strand of bases..?

which have folded due to the hydrogen bonds between the bases

the folding process leaves..?

3 exposed bases at the bottom which form an anticodon and at the top is the bonding site

tRNA can only…?

carry one specific type of amino acid to the ribosome