MYTUTOR SUBJECT ANSWERS

251 views

How do you explain the process of translation?

Enzymes which are specific to different tRNA types catalyse the bonding of amino acids to tRNA molecules, which requires ATP for energy.

There are 4 stages to translation: initiation, elongation, translocation and termination.

During initiation, the small ribosomal subunit binds to the 5' end of mRNA and moves along it until it reaches the start codon (which is AUG). Then the tRNA molecule binds to the codon (via its anticodon), due to complementary base pairing (A-T, C-G). After, the large ribosomal subunit binds at the P-site of tRNA, forming a complex.

During elongation, a second tRNA molecule pairs with the next codon at the ribosomal A-site and the amino acid is covalently bonded to the amino acid at the P-site.

During translocation, the ribsome moves along to the next codon, and the first tRNA molecule is moved to the E-site and is released. So, a new tRNA molecule enters the now empty A site and the process is repeated, synthesising a polypeptide chain in a 5'-3' direction.

(If multiple ribsomes act on the same chain they form a polysome)

Finally, termination occurs when the stop codon is reached. This is a codon that does not code for any amino acid. The polypeptide chain is released and the ribosome disassembles to be used again for another chain.

Lucy W. GCSE Biology tutor, IB Biology tutor, GCSE Maths tutor, GCSE ...

8 months ago

Answered by Lucy, an IB Biology tutor with MyTutor

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

16 SUBJECT SPECIALISTS

£20 /hr

Alisa H.

Degree: Biomedical Sciences (Bachelors) - University College London University

Subjects offered: Biology, Maths+ 1 more

Biology
Maths
Chemistry

“About Me:  Hi! My name is Alisa and I am studying Biomedical Sciences at University College London. Having just attained the International Baccalaureate  certificate in 2015 and also having a younger sister who I frequently help with ...”

£22 /hr

Francesco G.

Degree: BSc Biomedical Science (Bachelors) - Kings, London University

Subjects offered: Biology, Science+ 9 more

Biology
Science
Philosophy and Ethics
Italian
Human Biology
Chemistry
.UKCAT.
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“Hello! My name is Francesco Grillo, I am a first-year Biomedical Science student in London, at King's College London. I am passionate about science, philosophy and languages.I was born in Rome (Italy). My first experience abroad was ...”

£20 /hr

Ana G.

Degree: Psychology (Bachelors) - Durham University

Subjects offered: Biology, Spanish+ 4 more

Biology
Spanish
Maths
Environmental Studies
English Literature
Chemistry

“I study Psychology at Durham University and have just completed the International Baccalaurete programme. I have always unashamadedly loved learning, because I was lucky enough to have teachers who made the subjects fun and captivatin...”

MyTutor guarantee

About the author

Lucy W.

Currently unavailable:

Degree: Bsc Biological Sciences (Bachelors) - Exeter University

Subjects offered: Biology, Spanish+ 1 more

Biology
Spanish
Maths

“I am currently studying Biological Science at Exeter University - a course that I absolutely love.  I like to think I am a patient and considerate person, having experience tutoring younger family members, and other students whilst I ...”

You may also like...

Posts by Lucy

How do you explain the process of translation?

How is blood pumped around the body through the heart?

What is the best way to solve simultaneous equations?

Other IB Biology questions

What is the difference between a eukaryote and a prokaryote?

What is a dominant allele?

Explain the process of DNA translation

What is a test cross (Genetics)?

View IB Biology tutors

Cookies:

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

mtw:mercury1:status:ok