Study Material
BIOMOLECULES
Very Short Answer Questions
Q1. Medicines are either man made (i.e.. synthetic) or obtained from living organisms like plants, bacteria. animals etc. and hence the latter are called natural products. Sometimes natural products are chemically altered by man to reduce toxicity or si
Q2. Select an appropriate chemical bond among ester bond, glycosidic bond, peptide bond and hydrogen bond and write against each of the following. (a). Polysaccharide (b). Protein (c). Fat (d). Water
Q3. Give one example for each of aminoacids, sugars, nucleotides and fatty acids.
Q4. Explain the Zwitterionic form of an amino acid.
Q5. What constituents of DNA are linked by glylosidic bond?
Q6. Glycine and Alanine are different with respect to one substituent on the a-carbon. What are the other common substituent groups?
Q7. Starch, Cellulose, Glycogen, Chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a). Cotton fibre (b). Exoskeleton of cockroach (c). Liver (d). Peeled potato
Q8. What are primary and secondary metabolites? Give examples.
Q1. Write a brief polysaccharides. account on
Q2. Schematically represent primary. secondary and tertiary structures of a hypothetical polymer using protein. as an example.
Q3. Nucleic acid exhibits secondary structure, justify with example.
Q1. What are secondary metabolites? Enlist them indicating their usefulness to man.
Q2. What are the processes used to analyse elemental composition. organic constituents and inorganic constituents of living tissue? What are the inferences on the most abundant constituents of living tissue? Support the inferences with appropriate data.
Q3. Nucleic acids exhibit secondary structure. Describe through Watson Crick Model.
Q4. What is the difference between a nucleotide and nucleoside? Give two examples of each with their structure.
Q5. Describe various forms of lipid using a few examples.
Q1. What are macromolecules? Give examples.
Q2. Illustrate a glycosidic, peptide and a phospho-diester bond.
Q3. What is meant by tertiary structure of proteins?
Q4. 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.
Q5. 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?
Q6. Find out and make a list of proteins used as therapeutic agents. Find other applications of proteins (e.g.. Cosmetics etc.)
Q7. Explain the composition of triglyceride.
Q8. Can you describe what happens when milk is converted into curd or yoghurt. based on your understanding of proteins.
Q9. Can you attempt building models of biomolecules using commercially available atomic models (Ball and Stick models).
Q10. Attempt titrating an amino acid against a weak base and discover the number of dissociating (ionizable) functional groups in the amino acid.
Q11. Draw the structure of the amino acid, alanine.
Q12. What are gums made of? Is Fevicol different?
Q13. Find out a qualitative test for proteins, fats and oils, amino acids and test any fruit juice, saliva, sweat and urine for them.
Q14. 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!
Q15. All life forms exhibit 'unity in diversity - Give reasons.