Observation or inference for half and full saturation test, Biology

Assignment Help:

Define Observation or Inference for half and full saturation Test?

1. Starch is precipitated by half saturation with ammonium sulfate whereas dextrin is not precipitated. This test can be used to detect dextrin.

2. Starch and dextrin are both precipitated with ammonium sulfate. When colloids are dissolved in water, they get hydrated with water. A salt like ammonium sulfate has greater affinity for water and hence on addition to a solution of colloid, it precipitates the colloid from solution. The degree of hydration is proportional to the surface area of the colloid, which in turn is inversely proportional to the size of the colloidal molecule. Thus, starch being a larger molecule compared to dextrin, is precipitated even by half saturation with ammounium sulfate while dextrin is precipitated only when fully saturated with ammounium sulfate.

 


Related Discussions:- Observation or inference for half and full saturation test

How dynamic biological processes represented as network, How dynamic biolog...

How dynamic biological processes represented as network? Many dynamic biological processes throughout a wide range of ecological scales are easily represented as dynamical netw

Stomata - water loss, Stomata - Water Loss The cross-section of a leaf...

Stomata - Water Loss The cross-section of a leaf shown in Figure shows the position of a typical stoma (plural stomata) which however, differs from species to species, with re

What is the reason for the low red blood cell count, A patient has a low re...

A patient has a low red blood cell count, and microscopic examination reveals an abnormally high proportion of circulating reticulocytes. Upon subsequent examination, the patient i

What are enzymes?, Enzymes are proteins that are catalysts of chemical reac...

Enzymes are proteins that are catalysts of chemical reactions. From Chemistry, it is called that catalysts are non-consumable substances that decrease the activation energy essenti

How walking benefits for the health, Walking In the process of walking ...

Walking In the process of walking the motion of the two legs is coordinated so that one foot or the other is always in contact with ground. Walking is the best form of exercise

Which type of cell came first in evolution, Q. Which type of cell came firs...

Q. Which type of cell came first in evolution - the eukaryotic cell or the prokaryotic cell? This is an interesting problem of biological evolution. The majorly accepted hypoth

What are the main proteins that constitute the sarcomere, What are the main...

What are the main proteins that constitute the sarcomere? What is the function of those molecules in the muscle cells? In the sarcomere there are organized myosin and actin blo

Explain about genetic engineering, Genetic engineering has been successfull...

Genetic engineering has been successfully used for producing: 1. Transgenic mice for testing safety of polio vaccine before use in humans 2. transgenic models for studying ne

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