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

Disaccharides, DISACCHARIDES They are oligosaccharides composed of t...

DISACCHARIDES They are oligosaccharides composed of two monosaccharide residues . Three common disaccharides are    sucrose (glucose + fructose) = cane suger maltose

Briefly explain about the sit-ups test, Briefly explain about the Sit-ups T...

Briefly explain about the Sit-ups Test? To measure muscular endurance, bent knee sit-ups can be done. Sit-ups begin with the subject lying flat on their backs with their knees

Whether the drug-susceptible or drug-resistant phenotype, True or false? It...

True or false? It would be difficult to assess whether the drug-susceptible or drug-resistant phenotype in a population of Mycobacterium tuberculosis was more fit in an environment

Left antero lateral thoracotomy approach, Left Antero Lateral Thoracotomy A...

Left Antero Lateral Thoracotomy Approach :  Arterial and central venous pressure monitoring lines are placed. A left antero lateral thoracotomy is done through the 5th or 4th

What is the main external morphological feature, What is the main external ...

What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)? Platyhelminthes are also called as flatworms because they are

Glucose, Glucose is a six-carbon single sugar; It is the most common energ...

Glucose is a six-carbon single sugar; It is the most common energy source.

Define descending type of paper chromatography, Define Descending type of p...

Define Descending type of paper chromatography? In descending chromatography, the movement or flow of mobile phase is in downward direction. In this technique the solvent is ke

Define light source of microscope, Define Light Source of Microscope? I...

Define Light Source of Microscope? It is either mirror or electric illuminator present at the base. Identify the mirror in Figure. Some microscopes have reversible mirror with

Explain disease motion sickness, Motion Sickness  The pathogenesis of m...

Motion Sickness  The pathogenesis of motion sickness is poorly under- stood. The prescription cholinergic blocker scopolamine in a patch or oral formulation can decrease sympto

What is spectroscopy, Question Write a short note on the following ...

Question Write a short note on the following 1 Simple diffusion 2 Viscosity 3 What is spectroscopy? List and explain types of spectroscopy 4 With a neat diagram,

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