Biomolecules MCQs for NEET — Zoology Questions with Answers

The context states: 'Now if the tissue is fully burnt, all the carbon compounds are oxidised to gaseous form (CO2, water vapour) and are removed. What is remaining is called ‘ash’. This ash contains inorganic elements (like calcium, magnesium etc).' Therefore, magnesium would be found in the ash.

The text states: 'Scientists have found thousands of organic compounds in the acid-soluble pool.' Later, it clarifies that 'They have molecular weights ranging from 18 to around 800 daltons (Da) approximately.' This indicates small molecular weight organic compounds. The acid-insoluble fraction contains macromolecules and membrane fragments.

The NCERT text explicitly states: 'Lipids are not strictly macromolecules. The acid insoluble fraction, has only four types of organic compounds i.e., proteins, nucleic acids, polysaccharides and lipids. These classes of compounds with the exception of lipids, have molecular weights in the range of ten thousand daltons and above.' Lipids are found in the acid insoluble fraction because they form vesicles from broken cell membranes, which are not water-soluble, not primarily due to their macromolecular size.

The text mentions: 'There is one feature common to all those compounds found in the acid soluble pool. They have molecular weights ranging from 18 to around 800 daltons (Da) approximately.'

Table 9.4 shows: Water (70-90%), Proteins (10-15%), Carbohydrates (3%), Lipids (2%), Nucleic acids (5-7%). Therefore, proteins constitute the highest percentage after water.

The text states: 'Now if the tissue is fully burnt, all the carbon compounds are oxidised to gaseous form (CO2, water vapour) and are removed. What is remaining is called ‘ash’.'

Table 9.2 lists 'Compounds' and includes '$PO_4^{3-}$' alongside '$SO_4^{2-}$', indicating that $PO_4^{3-}$ represents phosphate.

The text states: 'While primary metabolites have identifiable functions and play known roles in normal physiological processes, we do not at the moment, understand the role or functions of all the ‘secondary metabolites’ in host organisms.'

Table 9.1, 'A Comparison of Elements Present in Non-living and Living Matter', shows Oxygen (O) in the Human body as 65.0%.

The context states: 'The acid insoluble fraction, has only four types of organic compounds i.e., proteins, nucleic acids, polysaccharides and lipids.'