Define observation or inference for picric acid test, Biology

Assignment Help:

Define observation or inference for picric acid test?

1. A mahogany red colour will be seen. The mahogany red colour indicates the presence of reducing sugar. All monosaccharides are reducing sugars and thus will give a positive picric acid test.

2. Maltose and lactose contain a free sugar group and thus can reduce picric acid in alkaline medium. Sucrose does not give this test as it does not have a free sugar group.

3. Starch with very few free sugar groups cannot reduce picric acid. Dextrin being a less complex molecule brings about partial reduction.


Related Discussions:- Define observation or inference for picric acid test

Transplantation, Transplantation - It is implanting of a living or p...

Transplantation - It is implanting of a living or preserved tissue or organ from one site to another side in the same individual or from one individual called donor to recip

Food might become contaminated by harmful bacteria, Three ways in which foo...

Three ways in which food might become contaminated by harmful bacteria. Food may become contaminated:- (i) from the unwashed hands of a food-handler, (ii) by house- flies

How boron affect the the synthesis of proteins, How boron affect the the sy...

How boron affect the the synthesis of proteins ? Inadequate availability of boron tends to increase the loss of phosphorus from plant roots and also affects the synthesis of pro

Can you define termination of the stress test, Q. Can you define terminatio...

Q. Can you define termination of the stress Test? Test should be terminated when: 1) PVCS develop in pairs or with increasing frequency or when ventricular tachycardia devel

Theory of embryology - theory of pangenesis, THEO R Y OF PANGENESIS - ...

THEO R Y OF PANGENESIS - Proposed by Charles Darwin. According this miniature present in the every body cell i.e. called gemmule

What is the plasma membrane of the cell, Q. What is the plasma membrane of ...

Q. What is the plasma membrane of the cell? What are its major functions? The plasma membrane is the external membrane of the cell, it delimits the cell itself and a cell inter

Composition of cell wall, COMPOSITION OF CELL WALL Cell wall composed ...

COMPOSITION OF CELL WALL Cell wall composed of cellulose, hemicellulose, pectin, lignin, cutin & chitin. Cell wall consists of 3 parts - 1. Matrix Highly cross-

Define disadvantages of direct microscopic count, Define Disadvantages of D...

Define Disadvantages of Direct Microscopic Count? 1. Small cells are difficult to see under the microscope and may be missed. 2. It gives total count, i.e., both live and de

Who was charles darwin, Who was Charles Darwin? The Charles Darwin was ...

Who was Charles Darwin? The Charles Darwin was an English naturalist born in 1809 and considered the father of the theory of evolution. By the end of the year 1831, before turn

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