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

Differentiate between osseointegration and osseointegration, Q. List the pa...

Q. List the parameters used to differentiate between osseointegration and fibro osseointegration. The parameters used are: a) Pain b) Rigid fixation - mobility scale, pe

425, #questionThree actographs (look closely to see the labels A, B, and C)...

#questionThree actographs (look closely to see the labels A, B, and C). Assume that the abscissa is either 24 or 48 hours for each actograph. You are asked to write two sentences f

Plant tissue, classification of plan''s tissue

classification of plan''s tissue

Fowl cholera, F o wl cholera Fowl cholera, a highly contagious diseas...

F o wl cholera Fowl cholera, a highly contagious disease of poultry caused by Pasteurella multocida, was one of the first infectious diseases to be recognized by Louis Past

Explain about the vitamin a - fat soluble vitamins, Explain about the Vitam...

Explain about the Vitamin A? Vitamin A, one of the fat soluble vitamins, refers to a sub-group of retinoid that possess the biological activity of all-trans-retinol. The term '

How does the hypophysis-corpus luteum negative feedback work, How does the ...

How does the hypophysis-corpus luteum negative feedback work? What is the name given to the atrophied corpus luteum after this feedback process? After ovulation the estrogen an

How does epistasis affect proportion of phenotypical form, In the hybridiza...

In the hybridization of 2 genes (4 different alleles, 2 of each pair) how does epistasis affect the proportion of phenotypical forms in the F2 generation? In the dihybridism wi

Deficiency diseases-copper deficiency, Copper deficiency Copper deficie...

Copper deficiency Copper deficiency may be primary or secondary (conditional). Primary copper deficiency occurs due to its inadequate dietary intake; whereas secondary copper d

What is diarrhoea, What is diarrhoea? Diarrhoea is characterized by th...

What is diarrhoea? Diarrhoea is characterized by the frequent evacuation of liquid stools, usually exceeding 300 ml, accompanied by an excessive loss of fluids and electrolyte

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