Biomolecules questions
1272 published questions with worked solutions.
- Two monosaccharides, -D-mannose and -D-fructose, are linked by C_m and C_n carbons in such a way that they form a non-reducing...
- How many of the following reagents/tests can be used to distinguish between glucose and fructose? (a) Bromine water (b) Fehling's...
- Essential amino acids cannot be made by our body. How many of the following are essential amino acids? (i) Alanine (ii) Leucine...
- How many basic groups are present in the shown ionic form of arginine?
- How many of the numbered locations in the histidine molecule (shown, with the imidazole ring and -amino group numbered) will form...
- An ionised form of glutamic acid is given below with 3 different pK_a values for its groups: -COOH (pK_a = 4.2), -COOH (pK_a =...
- A mixture of 3 amino acids — glutamic acid, serine and lysine — is separated out one by one in the following 3 steps: (i) adding...
- Consider the following amino acids: (i) Leucine (ii) Proline (iii) Tryptophan (iv) Tyrosine (v) Cysteine (vi) Histidine. How many...
- How many of the mentioned vitamins are fat soluble? Vitamin A, B, C, D, E and K
- Cobalt is a component in the structure of vitamin B_n, where n represents an integer. What is the value of n?
- At which numbered carbon are D-(+)-glucose and D-(+)-mannose epimers of each other?
- On prolonged heating with HI, glucose forms a compound with 'n' carbon atoms in a straight chain. What is the value of n?
- Two monosaccharides are held together by a glycosidic linkage between C_m and C_n carbons (the anomeric carbon of one furanose...
- Starch is a polymer of two components: amylose and amylopectin. In the structure of amylopectin, the straight chain is formed by...
- How many of the numbered locations in the histidine molecule (the imidazole ring and -amino nitrogen) will form an ion in...
- An ionised form of glutamic acid is given below with 3 different pK_a values: -COOH (pK_a=4.2), -COOH (pK_a=2.3) and -NH_3^+...
- How many peptide bond(s) is/are present in the structure H_2N-CH_2-CO-NH-CH_2-CO-NH-CH_2-COOH?
- The substituents R_1 and R_2 for a few peptides are listed in the accompanying table. How many of these peptides are positively...
- In the given scheme of a nucleic acid, the base and sugar are linked by a C_ a' linkage, and the sugar and phosphoric acid are...
- How many nitrogen atom(s) is/are present in a molecule of the base which is present in DNA but not in RNA?
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and IntegrationChemical Kinetics