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

How occlusal load affect osseointegration, Q. How Occlusal load affect osse...

Q. How Occlusal load affect osseointegration? Overloading the recognizing bone tissue prematurely will cause failure of osseointegration. A two stage surgery is advised routine

How old is the universe, How old is the universe? From the analysis of ...

How old is the universe? From the analysis of data collected by the Hubble telescope the age of the universe is estimated to be about 12 billion years.

Define control of infections for treatment for pem, Define Control of infec...

Define Control of infections for treatment for pem? Appropriate antibiotics should be started immediately since infections are the immediate cause of death in many children. Ch

Tissue and supporting system., what is the biological significance of the s...

what is the biological significance of the skeleton and supporting system in animals

Explain the ethical decisions in nutrition care, Some of  the  situations  ...

Some of  the  situations  that  concern ethical decisions in nutrition care are as follows: Difficulty of adequate nutritional support of malnourished patients, a) A problem

What physical fitness tests examine, What Physical fitness tests examine? ...

What Physical fitness tests examine? Physical fitness tests examine the components of physical fitness such as endurance, speed, strength, flexibility and body composition. The

Genitals examination of new born, Genitals check (in female), if ...

Genitals check (in female), if labia majora covers labia minora. In premature infant labia minora is not covered fully by labia majora.  check for discharge from vagin

Define energy needs during pregnancy period, Define Energy needs during pre...

Define Energy needs during pregnancy Period? Two factors determine energy requirements: increase in mother's basal metabolism to support the work required for foetal growth and

Define endocrine or hormonal disorders - infertility, Define Endocrine or H...

Define Endocrine or Hormonal Disorders - Infertility Infertility can be caused by endocrine disorders, long-term sequelae of sexually, transmitted infections, puerperal sepsis,

What is a food chain?, What is a food chain? The food chain is not bran...

What is a food chain? The food chain is not branched it is linear sequence in which a living being serves as food for another, starting with the producers and going up to the d

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