Tautomeric shifts, Biology

Assignment Help:

The original DNA sequence when ,transcribed and translated would yield five successive valine residues. But the altered sequence would correspondingly read one aspartate and four serine residues. Mutations resulting from the addition or deletion of base pairs are called frameshift mutations. So far we have discussed the several ways in which the genetic material could be altered. Mutations could be either spontaneous or induced. In recent years there has been a more clear understanding of the causes of mutational process. Tautomeric shifts, ultraviolet radiations, chemicals such as hydroxylarnine, nitrous acid and a variety of alkylating agents can cause permanent alterations of nitrogenous bases. Aromatic compounds such as acridines can cause addition or deletion of one to more than twenty bases in DNA. We have briefly discussed mutations, a way or source of variability in natural populations. Together with recombinations occurring'at the tjnie of meiosis they form the raw materials for selection to act on. Before we discuss briefly about recombination, let us have a quick look at mutation rates in organisms.


Related Discussions:- Tautomeric shifts

Briefly explain about pickled vegetables, Briefly explain about Pickled veg...

Briefly explain about Pickled vegetables These are produced by spontaneous lactic acid fermentation. Fermentation improves the digestibility and wholesomeness  of the product.

Which term refers to muscles with less than normal tone, In biological stud...

In biological studies which of the below terms is used to refer to muscles with less than normal tone? Is it: a) Latent b) Atonic c) Flaccid d) None of these ANSWE

What is isonietric exercise in dynamic auscultation, What is Isonietric Exe...

What is Isonietric Exercise in dynamic auscultation ? Can be carried out by doing handgrip exercise which is sustained over 20-30 second. It results in transient increase in SV

Which disease is associated with rapid dehydration, Which disease is associ...

Which disease is associated with the following symptoms? Sudden onset of profuse watery stool followed by vomiting, rapid dehydration and muscular cramps?

Can you explain shellfish poisoning, Q. Can you explain Shellfish Poisoning...

Q. Can you explain Shellfish Poisoning? Shellfish like oysters, mussels and clams are generally bred in the sewage polluted beds or brackish water. The shellfish poisoni

Define prevention in the prevalence of overweight or obesity, Define Preven...

Define Prevention in the prevalence of overweight or obesity? It is believed that the increase in prevalence of obesity worldwide is more due to the environment that has become

Explain some precautions for preparation of chloride buffers, Explain some ...

Explain some Precautions for Preparation of Chloride Buffers? 1. Glass electrodes should always be before and after measuring pH with a tissue paper. 2. The pipettes should

Principle for determination of blood glucose, Define Principle for Determin...

Define Principle for Determination of Blood Glucose by Nelson Somogyi Method? Proteins are precipitated from the sample and protein free filtrate is heated with alkaline copper

Genes and alleles, Genes and Alleles The inheritance of any character c...

Genes and Alleles The inheritance of any character can be studied only when thcre are two contrasting conditions, such as yellow versus green seed colour (as observed by Mendel

What do you mean by the good and bad cholesterol, Q. What are the so-called...

Q. What are the so-called "good" and "bad" cholesterol? Lipoproteins are complexes made of lipids (cholesterol and triglycerides) and proteins. The lipoproteins present differe

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd