Explain the observation or inference for seliwanoff test, Biology

Assignment Help:

Explain the Observation or Inference for seliwanoff's test?

1. Wine or cherry red colour seen. Wine red colour confirms the presence of a ketose sugar.

Note: On overheating aldoses also give the same reaction so continuous boiling should be avoided and test tube should be heated for 30 seconds to detect fructose.

2. seliwanoff's test is specific test for ketonic groups and therefore it is positive in case of sucrose. As studied in monosacccharides, seliwanoff's reagent contains HCl. In the presence of dil. HCl, sucrose  is hydrolyzed to glucose and fructose which then responds to the test.

3. Maltose and lactose on hydrolysis do not give fructose and so do not respond to this test. Starches and dextrins are made up mainly of glucose molecules. They do not contain a ketose and do not answer seliwanoff's test.


Related Discussions:- Explain the observation or inference for seliwanoff test

Define feeding options for premature and lbw babies, Define Feeding Options...

Define Feeding Options for Premature and LBW Babies? Different workers have tried different method and since all methods are successful, it is dependent on the individual infan

Hypothesis - nursing research, Hypothesis: The  spelling of hypothesis...

Hypothesis: The  spelling of hypothesis when written  as  "hypotheses"  indicate plural. The hypothesis is a statement or declaration of  the expected outcome of a research st

Power plants of the aerobic cells, Why can mitochondria be considered the p...

Why can mitochondria be considered the power plants of the aerobic cells? Ans) Mitochondria are the "power plants" of aerobic cells due to within them the final stages of the ce

Nursing care plan, Mrs. TT seventy three-year old has a long history of chr...

Mrs. TT seventy three-year old has a long history of chronic obstructive pulmonary disease (COPD). She came to the medical ward as shortness of breath, wheezing and a cough for the

Determine the neuropsychological assessment, Determine the Neuropsychologic...

Determine the Neuropsychological assessment  Neuropsychological assessment typically involves the functional areas of general intellectual capacities; memory; speed and accurac

What is tyrosinemia, Q. What is Tyrosinemia? There are two forms of her...

Q. What is Tyrosinemia? There are two forms of hereditary tyrosinemia. They are tyrosinemia Type I and tyrosinemia Type II. Type I was thought to be due to a deficiency of para

Explain the symbiotic relationships and their types, Explain the Symbiotic ...

Explain the Symbiotic Relationships and their types? Symbiosis : refers to a special type of association in which two species live together in a closely held relationship. In

Explain saturated fatty acids, Saturated fatty  acids General formula o...

Saturated fatty  acids General formula of saturated fatty acids  is CH3  (CHI), COOH. It has a polar end with a free XOOH group and a non-polar end with a hydrocarbon chain, as

Are there differences between the male and female skeletons, Q. Are there d...

Q. Are there differences between the male and female skeletons? Many general differences exist between female and male skeletons. Male skeleton is normally larger and heavier t

Explain the role of solutions, Explain the role of solutions? Solution...

Explain the role of solutions? Solutions:  A solution consists of a liquid solvent plus substances dissolved in it, called solutes. Solutes may be ions, atoms, or small molec

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