BIOMOLECULES: DAILY PRACTICE PAPER (DPP)

BIOMOLECULES: DAILY PRACTICE PAPER (DPP). ANSWER IS THE OPTION THAT IS IN BOLD LETTERS.

 

1. Choose the correct statements
2. All the elements

present in a sample of earth’s crust are also present in a sample of living

tissue

1. the relative abundance

of carbon and hydrogen with respect to other elements is higher in any

living organism than in earth’s crust

1. the relative abundance

of carbon and hydrogen with respect to other elements is lower in any

living organism than in earth’s crust

1. a and c only
2. b and c only
3. c only
4. all of the above
5. The type of organic compounds present in living organisms are analysed by

performing a chemical analysis of any living tissue (a vegetable or a piece of liver, etc.) by grinding that living tissue in

1. trichloroacetic acid (Cl3CCOOH)
2. acetic acid
3. formic acid
4. butyric acid
5. Amino acids are organic compounds containing an amino group and

an acidic group as substituents on the same carbon.

Thus, the amino acids are

1. substituted methanes
2. substituted ethanes
3. substituted aldehydes
4. substituted ketones

 

4. The chemical and physical properties of amino acids are essentially due to

 

a.the amino group,

1. the carboxyl group
2. the R groups
3. a only
4. b only
5. c only
6. All the above
7. Which of the following is/are not the aromatic

amino acids

1. tyrosine,
2. phenylalanine,
3. Tryptophan
4. Alanine
5. a, b, c only
6. a, b, d only
7. b, c, d only
8. a, c, d only
9. The total no. of carbon atoms in palmitic acid is
10. 16 carbons
11. 18 carbons
12. 20 carbons
13. 22 carbons

 

7. The glycerol is a
8. trihydroxy propane
9. trihydroxy Butane
10. tetra hydroxy Propane
11. . tetra hydroxy butane
12. The nitrogenous bases when found attached to

a sugar, they are called

1. nucleosides.
2. Nucleotides
3. Nucleic acids
4. DNA
5. Which of the following is not a nucleoside
6. Adenosine,
7. guanosine,
8. thymidine,
9. Adenylic acid

 

10. Which of the following is not a nucleotide
11. thymidylic acid,
12. guanylic acid,
13. uridylic acid

4.cytidine

 

11. Choose the correct statement w.r.t primary and secondary metabolites
12. The primary metabolites have identifiable

functions and play known roles in normal

physiologial processes,

1. we do not at the moment,

understand the role or functions of all the

‘secondary metabolites’ in host organisms.

 

1. many of the ‘secondary metabolites’ are useful to ‘human

welfare’ (e.g., rubber, drugs, spices, scents and

pigments).

d.Some secondary metabolites have

ecological importance.

1. a and b only
2. a and c only
3. a and d only
4. all of the above

 

12. The type of organic compounds present in living organisms are analysed by

performing a chemical analysis of any living tissue. During such chemical analysis, the organic compounds found in the acid insoluble fraction are

1. proteins,
2. nucleic acids,
3. polysaccharides
4. amino acids
5. a and b only
6. b and c only
7. a, b, c only
8. b, c, d only

 

 

13.All the classes of compounds, given below, have molecular weights in the

range of ten thousand daltons and above except

1. proteins,
2. nucleic acids,
3. polysaccharides
4. lipids

 

14. The molecules in the insoluble fraction, during the process of chemical analysis of a living tissue, are polymeric substances except.
15. proteins,
16. nucleic acids,
17. polysaccharides
18. lipids
19. Choose the correct statement w.r.t. lipids
20. Lipids are small molecular weight compounds.
21. the lipids get separated in the macromolecular fraction during chemical analysis of a living tissue.
22. Lipids are not strictly macromolecules.
23. a and b only
24. a and c only
25. b and c only
26. a, b, and c