JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank

done Numerical Value Type Questions - Biomolecules Total Questions - 10

• question_answer1)
  For 'invert sugar', the total number of correct statement(s) is (are) (Given: specific rotations of (+) -sucrose, (+)-maltose, L-(-)-glucose and L-(+) fructose in aqueous solution are \[+\text{ }66{}^\circ ,\,\,\,+140{}^\circ ,\,\,\,-\,\,52{}^\circ \] and\[+\,92{}^\circ \], respectively)

  (I) 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose.

  (II) 'invert sugar' is an equimolar mixture of D-(+)-glucose and D-(-)-fructose.

  (III) specific rotation of 'invert sugar' is \[-20{}^\circ .\]

  (IV) on reaction with \[B{{r}_{2}}\] water, ?invert sugar? forms saccharic acid as one of the products.

   
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• question_answer2)
  How many dipeptides are possible from two molecules of a typical \[\alpha \]-amino acid?
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• question_answer3)
  The total number of basic groups in the following form of lysine is  
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• question_answer4)
  A decapeptide (Mol. wt. 796) on complete hydrolysis gives glycine (Mol. wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. Calculate the number of glycine units present in the decapeptide.
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• question_answer5)
  When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form is: \[CHO-C{{H}_{2}}-CHOH-CHOH-CHOH-C{{H}_{2}}OH\]
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• question_answer6)
  A tetrapeptide has -COOH group on alanine. This produces glycine (Gly), valine (Val), phenyl alanine (Phe) and alanine (Ala), on complete hydrolysis. For this tetrapeptide, find the number of possible sequences (primary structures) with \[-N{{H}_{2}}\] group attached to a chiral center.
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• question_answer7)
  The specific optical rotations of pure a- and b-D- mannopyranose are \[+\,29.3{}^\circ \] and -17.0, respectively. When either form is dissolved in water, specific optical rotation of the equilibrium mixture is found to be \[+\,14.2{}^\circ \]. Calculate the percentage of a anomer at equilibrium.
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• question_answer8)
  Penicillin, the common antibiotic, has following structure: Find the number of different functional groups present in it.
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• question_answer9)
  The enzyme cytochrome C, involved in oxidation-reduction processes in the living system, has 0.43% Fe and 1.48% S. Calculate the number of S atoms in the enzyme per Fe atom.
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• question_answer10)
  A strongly alkaline solution of a monoaminodicarboxylic acid contains how many basic groups?
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