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Earn 100
Study the given statements and select the correct option.
(i) Carbohydrates, proteins, nucleic acids and lipids are primary metabolites.
(ii) Alkaloids, flavonoids, rubber, etc., are secondary metabolites.
(iii) Linoleic, linolenic and palmitic acids are the three essential fatty acids.
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Important Questions on Chemical Constituents of Living Cells
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Formation of structures and could be due to
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(i) Enzymes do not alter the overall change in free energy for a reaction.
(ii) Enzymes are proteins whose three dimensional shape is key to their functions.
(iii) Enzymes speed up reactions by lowering activation energy.
(iv) Enzymes are highly specific for reactions.
(v) The energy input needed to start a chemical reaction is called activation energy.
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(i) Right end of a polysaccharide chain is called reducing end while the left end is called non-reducing end.
(ii) Starch can hold iodine molecules in its helical secondary structure but cellulose being non-helical, cannot hold iodine.
(iii) Starch and glycogen are branched molecules.
(iv) Starch and glycogen are the reserve food materials of plants and animals, respectively.
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| Column I | Column II | ||
|---|---|---|---|
| (a) | Galactose | (i) | Protein |
| (b) | Anticoagulant | (ii) | Phospholipid |
| (c) | Fructose | (iii) | Brain sugar |
| (d) | Lecithin | (iv) | Heparin |
| (e) | Insulin | (v) | Fruit sugar |
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| (i) | Ester | Peptide | Glycosidic | Hydrogen |
| (ii) | Glycosidic | Peptide | Ester | Hydrogen |
| (iii) | Glycosidic | Peptide | Hydrogen | Ester |
| (iv) | Hydrogen | Ester | Peptide | Glycosidic |
