MYTUTOR SUBJECT ANSWERS

480 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

154 SUBJECT SPECIALISTS

£24 /hr

Joe M.

Degree: Biology (Bachelors) - Durham University

Subjects offered: Biology, Science+ 2 more

Biology
Science
Maths
Chemistry

“Second year Biology student tutoring science and maths in a relaxed and friendly environment”

£20 /hr

Catherine T.

Degree: BSc Medical Sciences with Professional Training Year (Bachelors) - Exeter University

Subjects offered: Biology, Science+ 3 more

Biology
Science
Human Biology
Extended Project Qualification
English Literature

“Aims and methods: I focus on breaking things down in to easy to digest pieces of information and will use a variety of methods to look at an aspect of your course. I will aim to make things clear and easy to remember, whilst also hopi...”

MyTutor guarantee

£30 /hr

Nicolas K.

Degree: Medicine (Bachelors) - Oxford, Brasenose College University

Subjects offered: Biology, Physics+ 5 more

Biology
Physics
Maths
Chemistry
.UKCAT.
-Oxbridge Preparation-
-Medical School Preparation-

“I`m Nic and I`m a 5th year clinical medicine student at Oxford University having recently graduated with a BA in medical science with a special focus in neuroscience. I aim to ensure that my students have both a solid grounding in the...”

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

Describe blood supply to the liver?

How are enzymes inhibited?

What is Exocytosis?

How does an action potential cause contraction in skeletal muscle?

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