Q21 . of 26 Page 1

Ans the following:

(i) Write the product obtained when D-glucose reacts with Br2 water.


(ii) What type of linkage is present in proteins?


(iii) Write one difference between DNA and RNA


(i) Write the product obtained when D-glucose reacts with Br2


When D-glucose reacts with bromine water it undergoes oxidation due to formation of HOBr that is a strong oxidation agent.



(ii) What type of linkage is present in proteins?


Proteins are biomolecules with large structures and high molecular weight and are linear polymers formed by linking the α-carboxyl group of one amino acid to other through a peptide bond. Peptide bonds are basically amide bonds, the structure is of glycylglycin as follows:



The second structure is just an extension of the polypeptide bond.


Option (iii)







More from this chapter

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19

How do you convert the following:

(i) Aniline to benzene.


(ii) Ethanamide to methamine.


(iii) Nitrobenzene to aniline.


OR


Write the chemical equations involved when C2H5NH2 is treated with the following reagents:


(i) CH3COCl/pyridine


(ii) C6H5SO2Cl


(iii) CHCl3 + KOH


 20

Write the names and structures of the monomers of the following polymers:

(i) Buna – N


(ii) Bakelite


(iii) Teflon


 22

Write the hybridization and shape of the following complexes:

(i) [Co(NH3)6]3+


(ii) [NiCl4]2-


 23

Seeing the growing cases of diabetes and depression among young children, Mr. Chopra, the principal of one of the reputed school organized a seminar in which he invited parents and principals. They all resolved this issue by strictly banning junk food in schools and introducing healthy snacks and drinks like soup, lassi, milk, etc. in school canteens. They also decided to make compulsory half an hour of daily physical activities for the students in the morning assembly. After six months, Mr. Chopra conducted the health survey in most of the schools and discovered a tremendous improvement in the health of the students.

After reading the above passage, answer the following questions:


(i) What are the values (at least two) displayed by Mr. Chopra?


(ii) As a student, how can you spread awareness about this issue?


(iii) Give two examples of artificial sweetners.