Biomolecules

A polysaccharide 'X' on boiling with dil H₂SO₄ ate 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine water give gluconic acid. 'X' contains b-glycosidic linkages only. Compound 'X' is:

With respect to the following reaction, consider the given statements:

(A) o-Nitroaniline and p-nitoraniline are the predominant products.

(B) p-Nitroaniline and m-nitroaniline are the predominant products.

(C) HNO₃ acts as an acid.

(D) H₂SO₄ acts as an acid.

Choose the correct option.

Two isomers (A) and (B) with molar mass 184 g/mol and elemental composition C, 52.2%; H. 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid respectively on oxidation with KMnO₄. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO₃. Isomer 'A' and 'B' are respectively

Which statement is NOT correct for p- toluenesulphonyl chloride?

Given below are two statements:

Statement I: In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II: If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to given NaCN and Na₂S.

In the light of the above statements, choose the most appropriate answer from the option given below

Sugar moiety in DNA and RNA molecules respectively are

 $C_6{H}_{12}{O}_6\stackrel{Zymase}{\to }$ A $\underset{\Delta }{\overset{NaOl}{\to }}B+CH{l}_3$

The number of carbon atoms present in the product B is______________.

Which one of the following is a reducing sugar?

Animals starch is the other name of