Solution of Chapter 9. Biomolecules (Biology NCERT Book)

1 What are Macromolecules? Give examples.

2 What is meant by tertiary structure of proteins?

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

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

5 Explain the composition of triglyceride.

6 Can you describe what happens when milk is converted into curds or yoghurt from your understanding of proteins?

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

8 Draw the structure of amino acid Alanine.

9 What are gums made of ? Is fevicol different?

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

11 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!

12 Describe the important properties of enzymes.