MYTUTOR SUBJECT ANSWERS

344 views

How does the process of transcription work?

Transcription is the first part of gene expression - making DNA into functional proteins. It occurs in the nucleus of cells. During transcription, information from DNA is transcribed into messenger RNA (mRNA). In a process called translation, mRNA is translated into a string of amino acids that become folded into proteins who continue to do a multitude of functions in the cell.

There are three main steps in transcription: initiation, elongation and termination.

Initiation: The process of transcription is initiated when an RNA polymerase enzyme binds to a region of DNA at a promoter sequence. This binding cause the DNA double helix to unwind and one of the two DNA strands is transcribed into mRNA

Elongation: RNA polymerase reads the antisense strand and adds nucleotides complementary to the antisense strand at 3’ end of the growing mRNA transcript. The mRNA strand is complementary to the antisense strand and therefore identical to the opposite strand (sense strand).

Termination: This phase occurs when RNA polymerase reaches a specific sequence on the DNA, called a termination sequence. This is a sequence of nucleotides that signal to the polymerase to dissociate from the DNA and release the mRNA transcript. The mRNA transcript then exits the nucleus and is translated into protein.

Anja D. GCSE Biology tutor, IB Biology tutor, IB English Literature t...

8 months ago

Answered by Anja, an IB Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

22 SUBJECT SPECIALISTS

£24 /hr

Neha C.

Degree: Medicine (Bachelors) - Birmingham University

Subjects offered:Biology, Maths

Biology
Maths

“Passionate, patient and pleasant tutor, tutoring students on maths and science subjects.”

£20 /hr

Marek W.

Degree: Biochemistry with German for Science (Bachelors) - Imperial College London University

Subjects offered:Biology, German+ 2 more

Biology
German
Chemistry
-Personal Statements-

“Science?- Yes, please! Who I am? I am Biochemistry with German student at Imperial College London. I am patient and friendly to explain you things that you are struggling with. In my free time I play tennis and dance Punjabi. I have b...”

Ollie W. GCSE Biology tutor, IB Biology tutor, A Level Biology tutor...
£24 /hr

Oliver W.

Degree: Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Maths+ 4 more

Biology
Maths
Extended Project Qualification
Economics
Chemistry
-Personal Statements-

“I am third year student at the University of Cambridge studying Natural Sciences. I specialise in Neurobiology. However, I have a lot of experience in othersciences and maths, at GCSE and IB level. I studied for 5 years at Sevenoaks Sc...”

About the author

Anja D. GCSE Biology tutor, IB Biology tutor, IB English Literature t...

Anja D.

Currently unavailable: until 31/12/2016

Degree: Biosciences (Doctorate) - Birmingham University

Subjects offered:Biology, Geography+ 2 more

Biology
Geography
English Literature
-Personal Statements-

“About me:  Hey there! I am a PhD student at the University of Birmingham and I am very passionate about Biology and English Literature! I am originally from Serbia but I had the fantastic opportunity to grow up in Qatar. While there I...”

You may also like...

Posts by Anja

How do I analyse a literature text?

How does the process of transcription work?

Other IB Biology questions

Explain how a nerve impulse passes along a non-myelinated neuron

How can immunity be acquired?

State two examples of current uses of genetically modified crops or animals.

Explain that female carriers are heterozygous for X-linked recessive alleles.

View IB Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok