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

What is intra oral and extra oral, What is Intra oral and Extra Oral A...

What is Intra oral and Extra Oral A) Intra oral a) Frontal in occlusion b) Left and right occlusion (Using intra oral photography mirror) c) Occlusal view maxillary

CONNECTING LINKS, HOW SHOULD I PREPARE AN INVESTIGATORY REPORT ON CONNECTIN...

HOW SHOULD I PREPARE AN INVESTIGATORY REPORT ON CONNECTING LINKS AS AN EVIDENCE OF EVOLUTION

Define term population, What is a population? In Biology a population i...

What is a population? In Biology a population is a set of individuals of the similar species living in a given place and in a given time.

Trinomial systeem of nomenclature, can you tell 10 examples of trinomial sy...

can you tell 10 examples of trinomial system of nomenclature?

Explain the relation between chromatin and chromosome, What is the relation...

What is the relation between the concepts of chromatin and chromosome? Are euchromatin and heterochromatin part of chromosomes? Every filament of chromatin is a complete DNA mo

Describe chemical equation of photosynthesis?, Q. What is the chemical equa...

Q. What is the chemical equation of photosynthesis? The chemical equation of photosynthesis is given below: 6 CO 2 + 6 H 2 O + light --> C 6 H 12 O 6 + 6 O 2

Digestion, In humans, starch digestion begins in the buccal cavity, but sto...

In humans, starch digestion begins in the buccal cavity, but stops in the stomach .Why?

Why is a balanced frequency of different alleles of a gene, Why is a balanc...

Why is a balanced frequency of different alleles of a gene in a population more useful for the survival of that population facing environmental changes? For the trait condition

Effect on microbial ecology and food spoilage of ph, Q. Effect on Microbial...

Q. Effect on Microbial Ecology and Food Spoilage of pH? The acidity of a product plays an important role in deciding the type microflora present in food and the rate and type o

How the type of sport influence protein requirements, How the type of Sport...

How the type of Sport influence protein requirements? The type of sport and total calorie intakes influence protein requirements. Eating sufficient foods to meet high energy re

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