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

Bacterial diseases-botulism, Botulism Botulism is a rapidly fatal motor...

Botulism Botulism is a rapidly fatal motor paralysis. It is caused by ingestion of toxin of Clostridium botulinum in food. Many species of domesticated, wild animals and birds

Explain about riboflavin, Explain about Riboflavin Aqueous solution sh...

Explain about Riboflavin Aqueous solution shows a pronounced green-yellow fluorescence, which is maximal at a pH of about, 6-7 and disappears upon the addition of acids and al

Explain the disadvantages of tissue punch, Explain the Disadvantages of tis...

Explain the Disadvantages of tissue punch - There is a loss of keratini-ed tissue and this can lead to a compromised soft tissue barrier in cases where there is deficiency of a

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-

Is herbivorism a form of predatism, Q. Is herbivorism a form of predatism? ...

Q. Is herbivorism a form of predatism? The Herbivorism is a form of predatism in which first order consumers feed from producers (plants or algae). For instance, fruits and bir

In which environments bacteria live, Q In which environments bacteria live?...

Q In which environments bacteria live? Bacteria can be found in a variety of environments throughout the planet. There are bacteria in the air, on the surface, in fresh water,

What are the elements that constitute the stomata, What are the elements th...

What are the elements that constitute the stomata? The Stomata is made of a central opening the ostiole or slit delimited by two guard cells responsible for its closing or open

State the term - symbolic representation, State the term - Symbolic represe...

State the term - Symbolic representation Symbolic representation is the representation of both the external and internal world through symbols and has been discussed in relatio

Explain the ecg and cheast x- ray, Explain The ECG and cheast X- Ray? ...

Explain The ECG and cheast X- Ray? The ECG and Chest X-ray: If there is a suspicion of heart disease on basis of the history or physical examination an ECG and a chest X-ray

Explain properties of amylopectin and amylose, Properties of Amylopectin an...

Properties of Amylopectin and Amylose In plants, starch is packaged in granules, which vary in their  shape and size, when isolated from different sources. The size of these gr

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