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

Explain the autonomic neuropathy, Explain the Autonomic neuropathy It l...

Explain the Autonomic neuropathy It leads to dry skin due to decreased sweating. Dryness of the skin leads to cracking which makes entry of infection in to the deeper plane eas

What is hydrogen bonds, What is hydrogen bonds? Hydrogen Bonds : Hydr...

What is hydrogen bonds? Hydrogen Bonds : Hydrogen bonds form between polar molecules, such as water. Each water molecule has two positively charged hydrogen poles, and one ne

Explain the differance between savanna and desert, Explain the differance b...

Explain the differance between savanna and desert? Savanna : Savanna is characterized by relatively low rainfall and pronounced dry seasons. This type of climate produces a b

Cholesterol, Cholesterol Cholesterol is found in several of the animal ...

Cholesterol Cholesterol is found in several of the animal foods we eat, involving cheese, eggs, and red meat. Just animal cells utilize and synthesize cholesterol. Click the bu

What do you mean by tuberculosis, Q. What is tuberculosis? How is the disea...

Q. What is tuberculosis? How is the disease transmitted? Is there treatment for tuberculosis? The Tuberculosis is a disease caused by the Mycobacterium tuberculosis bacteria wh

What is the importance of fungi, What is the Importance of Fungi? Fungi...

What is the Importance of Fungi? Fungi are widely distributed in nature. It is estimated that there are about 1.5 million species of fungi on earth. Fungi are both beneficial a

Define the sources of vitamin d, Define the Sources of Vitamin D? Vitam...

Define the Sources of Vitamin D? Vitamin D, also called the sunshine vitamin is easily manufactured in the skin from 7-dehydro cholesterol on exposure to sunlight, as already m

Cardiac cycle, The term cardiac cycle means one pumping cycle which consist...

The term cardiac cycle means one pumping cycle which consists of contraction (systole) and relaxation (diastole) of both the atria and both ventricles. Both the atria contract at t

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