BIOMOLECULES

For analysis of a living tissue sample, we first grind it in trichloroacetic acid (Cl_3C.COOH) using a mortar and a pestle and obtain a thick slurry. Then, after straining the slurry through a cheese cloth, we obtain two fractions, viz, one is filtrate (or acid-soluble pool) and the other retentate (or acid-insoluble fraction). We observed that all the small biomolecules are present in the filtrate. Whereas, proteins, polysaccharides and nucleic acid get precipitated. The acid soluble compounds include amino acids, nucleosides, small sugars, etc. When one adds a phosphate group to a nucleoside one gets another acid soluble biomolecule. Could you guess its name?

The given biomolecule is the part of the defense system which is responsible for........ response with A and B lebeled as :

The active site of a biomolecule R is shown below The biomolecule R binds to a tripeptide because its binding site is complementry to that of tripeptide. The shape of the tripeptide would be Note : Complimentarity in the figure is shown by shape

Below is the image of an organic molecule that participates in the formation of a biomolecule . In the above image of the molecule determine the element that will that the place marked by the dots (*)

Given below is a representation of a very important process in the construction of a biomolecule . Choose the correct statement about this process from the following.

Chlorophyll is a biomolecule responsible for green colour in the plants. Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 6 g of chlorophyll (Mg = 24)

Which one of the following roles is not characteristic of an essential element? 1. Being a component of biomolecules. 2. Changing the chemistry of soil. 3. Being a structural component of energy related chemical compounds. 4. Activation or inhibition of enzymes.

Choose correct options w.r.t. Essential elements for plant nutrition. (a) absolutely necessary for normal growth and reproduction. (b) Indirectly involved in plant metabolism. (c) All the essential elements are components of biomolecules. (d) The requirment of element is specific and cannot be replaceable by another element.

Read the following statements below. I. All the carbon compounds that we get from living tissues can be called ‘biomolecules. II. The ash formed after burning a tissue contains inorganic and organic substances. . III. Beta amino acids are used by the cells to form proteins. . Identify the true and false statements.

Select the incorrect statement from the following : (i) Biomolecules are in metabolic flux in the living state . (ii) Living process is a constant effort to prevent falling into equilibrium (iii) Metabolism provides a mechanism for the production of energy (iv) Living state and metabolism is synonymous