NCERT solutions Biology Textbook for Class 11 chapter 9 Biomolecules



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Chapter 9 - Biomolecules

Pages 160 - 161

What are macromolecules? Give examples.

Q 1 | Page 161 | view solution

Illustrate a glycosidic, peptide and a phospho-diester bond.

Q 2 | Page 160 | view solution

What is meant by tertiary structure of proteins?

Q 3 | Page 160 | view solution

Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.

Q 4 | Page 160 | view solution

Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

Q 5 | Page 160 | view solution

Find out and make a list of proteins used as therapeutic agents. Find other applications of proteins (e.g., cosmetics, etc.)

Q 6 | Page 160 | view solution

Explain the composition of triglyceride.

Q 7 | Page 160 | view solution

Can you describe what happens when milk is converted into curd or yoghurt from your understanding of proteins.

Q 8 | Page 161 | view solution

Can you attempt building models of biomolecules using commercially available atomic models (Ball and Stick models).

Q 9 | Page 161 | view solution

Attempt titrating an amino acid against a weak base and discover the number of dissociating ( ionizable ) functional groups in the amino acid.

Q 10 | Page 161 | view solution

Draw the structure of the amino acid, alanine

Q 11 | Page 161 | view solution

What are gums made of ? Is fevicol different ?

Q 12 | Page 161 | view solution

Find out a qualitative test for proteins, fats and oils, amino acids and test, any fruit juice, saliva, and urine for them.

Q 13 | Page 161 | view solution

Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What a loss of vegetation!

Q 14 | Page 161 | view solution

Describe the important properties of enzymes.

Q 15 | Page 161 | view solution

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