Define molisch's test or alpha naphthol reaction, Biology

Assignment Help:

Define Molisch's Test or alpha naphthol reaction?

The Molisch test is a common test for the existence of carbohydrates.

Principle

The reaction is due to the formation of furfural or furfural derivatives. Furfural and furfural derivatives are derived from the dehydration of sugars. The dehydration is caused by the action of concentrated sulphuric acid on sugars. Disaccharides, oligosaccharides and polysaccharides are hydrolyzed to yield their repeating monomers by the acid. The alpha-naphthol reacts along with the cyclic aldehydes to make purple coloured condensation products.

1110_Molisch’s Test or alpha naphthol reaction.png


Related Discussions:- Define molisch's test or alpha naphthol reaction

LPN, In many tests it is acceptable to read a positive result before the in...

In many tests it is acceptable to read a positive result before the incubation time is completed. why is this not the case with starch agar?

Deficiency diseases-calcium deficiency (hypocalcicosis), Calcium  deficien...

Calcium  deficiency (hypocalcicosis) Calcium deficiency or hypocalciosis is a sporadic condition occurring in a particular group of animals causing osteodystrophy. Aetiol

Double fertilization, Double fertilization  It carries two sperm cells to t...

Double fertilization  It carries two sperm cells to the female. A characteristic of angiosperms in which the pollen tube gametophyte in the ovule. The one sperm cell fuses with the

How d-glucose differs from d-galactose, D-glucose differs from D-galactose ...

D-glucose differs from D-galactose only in the arrangement around carbon 4. Therefore D-glucose and D-galactose are- Select one: a. enantiomers b. epimers c. mirror ima

Explain the false indications of endodontic surgery, Explain the False indi...

Explain the False indications of Endodontic Surgery a) Large periapical lesion that could not be eliminated with non-surgical approach. b) Incomplete root formation "open ap

Controlled hypothermia, Controlled Hypothermia Although birds and mamm...

Controlled Hypothermia Although birds and mammals frequently function in the homeothermic mode and maintain relatively high stable temperatures, many mammals and some birds ha

Protection of plants against toxic substances, Protection of Plants against...

Protection of Plants against Toxic Substances Plants produce several toxic substances themselves and may also encounter the ones produced by other plants or present in the env

Explain cell signaling, In multicellular organisms there is a requirement f...

In multicellular organisms there is a requirement for the cells to communicate with one another in order to coordinate their metabolism and growth.  The principal way by  that  cel

What do you mean by cephalopods and vertebrates, Q. How does photosensitivi...

Q. How does photosensitivity in annelids, cnidarians and worms differ from insects, cephalopods and vertebrates? In the first mentioned group of animals there are photoreceptor

Explain congenital heart disease (chd), Explain Congenital Heart Disease (C...

Explain Congenital Heart Disease (CHD)? Congenital heart disease is an abnormality at birth in cardiac circulatory structure or function. Optimal management of CHD aims not mer

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