MYTUTOR SUBJECT ANSWERS

514 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 ...

2 years ago

Answered by Ellen, an A Level Biology tutor with MyTutor


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

164 SUBJECT SPECIALISTS

£20 /hr

Hester G.

Degree: Medicine (Bachelors) - Edinburgh University

Subjects offered:Biology, French

Biology
French

“I'm passionate about teaching subjects I love. I stand out as being a fun, thorough, logical, and flexible tutor.”

MyTutor guarantee

£20 /hr

Kelsey M.

Degree: Microbiology (Bachelors) - Queen's, Belfast University

Subjects offered:Biology, Science+ 1 more

Biology
Science
Maths

“About Me: My name is Kelsey and I am currently in my final year of a Bachelors degree in Microbiology at Queen's University Belfast. I'm really excited by microorganisms - the good, the bad and the ugly. About Tutoring: The content of ...”

MyTutor guarantee

Sam W. A Level Biology tutor, GCSE Biology tutor, A Level Chemistry t...
£20 /hr

Sam W.

Degree: Biology (Bachelors) - Manchester University

Subjects offered:Biology, English Literature+ 1 more

Biology
English Literature
Chemistry

“A friendly, relaxed and easy to talk to tutor who tries to make their tutorials interesting, personalising the tutorials depending on what the tutee needs.”

MyTutor guarantee

About the author

Ellen P.

Currently unavailable: for regular students

Degree: Evolutionary Anthropology (Masters) - 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 are the key steps in the light dependent reaction of photosynthesis?

How do I work out a genetic cross?

A plant community on an extinct volcano displays the process of succession. Explain why there would be very few species at the end of the eruptive life cycle of the volcano and why rate of new species introduction would rapidly increase afterwards.

What is the difference between viral antigenic drift and antigenic shift?

View A Level 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