MYTUTOR SUBJECT ANSWERS

338 views

When do mutations not cause a change in amino acid sequence?

The genetic code is degenerate- this means that amino acids can be coded for in more than one way. In an mRNA sequence coding for a protein, each amino acid in the protein is encoded by one codon (set of three nucleotides). Some amino acids can only be coded for by one particular codon (eg tryptophan, UGG) but most can be coded for by at least two different codons which differ in their third letter. This means that if a mutation occurs in the third letter of a codon, there is a significant chance that it will still code for the same amino acid.

It has been suggested that this flexibility is necessary for life to evolve, as it makes natural selection more lenient towards mutations that would otherwise be harmful.

Ellen M. GCSE Biology tutor, GCSE Physics tutor, GCSE Maths tutor, A ...

1 year ago

Answered by Ellen, an A Level Biology tutor with MyTutor

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

129 SUBJECT SPECIALISTS

£20 /hr

Simone V.

Degree: Biochemistry (Bachelors) - University College London University

Subjects offered: Biology, Science+ 4 more

Biology
Science
Maths
French
Dutch
Chemistry

“I believe that the most important thing a tutor can do is to motivate the student and make learning fun! That’s exactly what I want to achieve during a session. At the end of a session, I want you to feel like you learned something in...”

£26 /hr

Georgina M.

Degree: Biological Sciences (Bachelors) - Exeter University

Subjects offered: Biology, Science+ 3 more

Biology
Science
Extended Project Qualification
Chemistry
-Personal Statements-

“A passionate tutor in Science from a top Russell Group university. Wants to help you improve your confidence and understanding to get top grades.”

£22 /hr

Sophie S.

Degree: Conservation and Biodiversity (Masters) - Exeter University

Subjects offered: Biology, Geography+ 1 more

Biology
Geography
-Personal Statements-

“Hello all, My name is Sophie. I’m currently studying for a Masters in Conservation and would love the opportunity to tutor in my spare time. I earned a 2:1 in my bachelor’s biology degree, and, as you might have guessed, my specialist...”

About the author

Ellen M.

Currently unavailable: for regular students

Degree: Biological Sciences (Bachelors) - Oxford, Pembroke College University

Subjects offered: Biology, Physics+ 2 more

Biology
Physics
Maths
-Personal Statements-

“Third year biologist looking to share my enthusiasm for maths and science. Can also help with university applications.”

You may also like...

Posts by Ellen

How can an object accelerate without changing speed?

What is the difference between a gene and an allele?

When do mutations not cause a change in amino acid sequence?

Other A Level Biology questions

What is the difference beween biological species concept and the phylogentic approach to defining species?

What are the two main secondary structures of proteins?

How do humans regulate their body temperature?

What precisely is autoregulation in the kidney? Is it solely the ability to vary the diameters of the afferent and efferent arterioles? If so how is this controlled?

View A Level 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