Test: Analysis of Chemical Composition of Biomolecules - NEET MCQ

Adenylic acid is used in the content to represent the structure of a nucleotide.

Topic in NCERT: Nucleic acids

Line in NCERT: "adenylic acid, thymidylic acid, guanylic acid, uridylic acid and cytidylic acid are nucleotides."

Carbon compounds are oxidized to gaseous forms like CO2 and are not found in the ash.

Topic in NCERT: How to analyse chemical composition?

Line in NCERT: "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)."

Alanine is the amino acid that has a methyl group (-CH3) as its R group.

Topic in NCERT: Amino acids

Line in NCERT: "the r group in these proteinaceous amino acids could be a hydrogen (the amino acid is called glycine), a methyl group (alanine), hydroxy methyl (serine), etc."

The retentate is the fraction consisting of larger, acid-insoluble compounds remaining after straining.

Topic in NCERT: Biomolecules

Line in NCERT: "the second, the retentate or the acid-insoluble fraction."

Glycerol is classified as a simple lipid and is a component of many complex lipids like triglycerides.

Topic in NCERT: Lipids

Line in NCERT: "another simple lipid is glycerol which is trihydroxy propane."

When adenine is attached to a sugar, the compound is called a nucleoside, specifically adenosine. If a phosphate group is also attached, it forms a nucleotide called adenosine phosphate. The correct answer is adenosine, which is the nucleoside formed from adenine and a sugar.

The liquid obtained after straining the mixture is technically called the filtrate or acid-soluble pool.

Topic in NCERT: Biomolecules

Line in NCERT: "one is called the filtrate or more technically, the acid-soluble pool, and the second, the retentate or the acid-insoluble fraction."

Topic in NCERT: Primary and secondary metabolites

Line in NCERT: "hydroxy methyl (serine), etc."

After fully burning the tissue sample, the residue left is called 'ash', which contains inorganic elements.

Topic in NCERT: How to analyse chemical composition?

Line in NCERT: "what is remaining is called ‘ash'."

Trichloroacetic acid (Cl3CCOOH) is used to grind living tissue into a slurry as part of the procedure for analyzing chemical composition.

Topic in NCERT: How to analyse chemical composition?

Line in NCERT: "we can take any living tissue (a vegetable or a piece of liver, etc.) and grind it in trichloroacetic acid (ciccooh) using a mortar and a pestle."