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12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - I updated Creative Questions

Published on: 13/05/2022

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Std: 12th Standard - Chemistry

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

What do you mean by zwitter ion?

Name the important biological functions of nucleic acids.

Write a note on rRNA.

The two strands in DNA are not identical but are complementary explain.

Define nucleotide.

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Answers Key:

Generic 2

5 x 2 = 10

Due to the presence of an acidic and a basic group in the same molecule, amino acids exist in an ionic form called a Zwitter ion where the proton of -COOH group is transferred to the -NH₂ group

(i) Energy carriers (ATP)
(ii) Components of enzyme cofactors
(iii) Chemical messengers.

rRNA is mainly found in cytoplasm and in ribosomes, which contain 60% RNA and 40% protein. Ribosomes are the sites at which protein synthesis takes place.

In the helical structure of DNA, the two strands are held together by hydrogen bonds between specific pair of bases. Cytosine forms hydrogen bond with guanine while adenine forms hydrogen bonds with thymine. As a result the two strands are complementary to each other.

Nucleotides are monomers of nucleic acid, They consist of heterocyclic base, pentose sugar and phosphoric acid residue.