Radioisotopes, Biology

Assignment Help:

Radioisotopes

Radioisotopes are those forms of an element which exhibit rzdioactivity and so can be used as markers or tracers. For this purpose, we first introduce the radioisotope in a molecule in the cell and then detect the radioactivity with the help of certain device. For example, if we replace a suitable hydrogen atom of thymidine by 3H, we may trace the course of thymidine in the cell. Since thymidine is a component of DNA but not of RNA, we can be sure that we are following only DNA metabolism. Similarly, to know the course of protein synthesis we may use radioactively labelled amino acids.

Radioisotopes are used to:

(a) measure the rates of metabolic turnover of a material within a cell or tissue,

(b) locate the site of synthesis of molecules,

(c) measure the rate of exchange of materials across cellular membranes,

(d) locate a molecule in a cell. Radioisotopes are widely applied to study also the precursor-product relathship.

Many times when a radioactively labelled mokcule (pncursor) is introduced into a system. The molecule is chemically converted into another form (product). For example, when radioactive iron is introduced in blood, radioactivity can be detected in liver femtin and haemoglobin of red blood cells. Similarly, radioactivity of 32P- labelled phosphate can be detected in many phospholipids.


Related Discussions:- Radioisotopes

Explain the nutrient requirements during lactation, Normal 0 fa...

Normal 0 false false false EN-IN X-NONE X-NONE

Main prophylactic measures against schistosomiasis, Q. What are the main pr...

Q. What are the main prophylactic measures against schistosomiasis? The major measures to prevent schistosomiasis are information for infected individuals to look for treatment

Differences between anastral and astral mitosis, Q. What are the difference...

Q. What are the differences between anastral and astral mitosis? Astral mitosis is that in which there is formation of the aster a structure made by the centrioles. Anastral mi

Define physiological effects of scfa, Define physiological effects of SCFA?...

Define physiological effects of SCFA? The physiological effects of SCFA's can be summarized as follows. They: Lower the ph in the gastrointestinal tract, which in turn r

Explain the vertical implant position, Vertical Implant Position: The i...

Vertical Implant Position: The implant can be submerged in the bone up till the level, where it is surface treated or further embedded till its shoulder, depending upon the sit

What is population density, Q. What is population density? The Populati...

Q. What is population density? The Population density is the relation between the number of individuals of a population and the area or volume they occupy. For instance, in 200

Chromosome walking, Chromosome walking is the technique for cloning everyt...

Chromosome walking is the technique for cloning everything in genome around the known piece of DNA (the begning probe). You screen the genomic library for all the clones hybridizi

How are platelets formed, How are platelets formed? What is the function of...

How are platelets formed? What is the function of platelets? What consequences does the clinical condition known as thrombocytopenia yield? Platelets, also called as thrombocyt

Can obesity causes the cardiovascular disease, Q. Can Obesity causes the ca...

Q. Can Obesity causes the cardiovascular disease? As you know obesity or excessive weight is the primary cause of cardiovascular disease. It is an independent risk factor for h

What are the indications of cardiac transplantation, What are the indicatio...

What are the indications of Cardiac Transplantation ? Indication :  Patients in NYHA class IV with heart failure, refractory to medical management caused by end stage corona

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