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

Pre-operative nursing care of a child with cleft lip, Pre-operative Nursing...

Pre-operative Nursing Care of a Child with Cleft Lip   We shall begin with pre-operative nursing care and then focus on post-operative Disorders care. As you know that initial

Acute complications of diabetes mellitus, Various acute complications of di...

Various acute complications of diabetes mellitus are described in this unit. Acute complications develop within a short period of time. These are due to improper treatment of diabe

How many different gene types are possible, In lab rats, hair color and tex...

In lab rats, hair color and texture are controlled by two genes, the A gene for color and the B gene for texture. in both of these genes, the alleles show no dominance to each othe

Define advantages of using yeast as a source of protein, Define Advantages ...

Define Advantages of using Yeast as a source of Protein? 1. Large size, hence separation from the culture medium is easy. 2. As the pH of the growth is towards acidic side,

Chromolipid, CHROMOLIPID Formed by lipid & pigment, eg. carotene, xanth...

CHROMOLIPID Formed by lipid & pigment, eg. carotene, xanthophylls. Lycopene present in tomato & red chilli. Carrot is rich in b-carotene, converted into vitamin A.

Importance of compliance, It is important to explain to the patient about i...

It is important to explain to the patient about importance of taking treatment regularly. In case he misses the dose or takes medicine or insulin irregularly, explain the side effe

Law of Minimun, What are the examples of Law of Minimum?

What are the examples of Law of Minimum?

Explain radiation sterilization, Explain radiation sterilization Variou...

Explain radiation sterilization Various studies have been conducted which show the effect of processing on vitamins especially, thiamine. In one study, which compared the effec

Diabetes mellitus, Diabetes mellitus, Types I and II is a disorder regard...

Diabetes mellitus, Types I and II is a disorder regarding the defects in insulin action. Type I diabetes is characterized by an inadequate insulin secretion; Type II diabetes is

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