In a nucleotide the phosphate linkage is generally attached to -
  • A$C-1$ of the sugar
  • B$C-2$ of the sugar
  • C$C-5$ of the sugar
  • D
    nitrogen atom of the base
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  • 1
    The compound $I$ and $II$ are related as

    $\mathop {\begin{array}{*{20}{c}}
      {\begin{array}{*{20}{c}}
      {COOH\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {H - C - OH\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
    \end{array}} \\ 
      {Br - C - H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {\,\,\,COOC{H_3}} 
    \end{array}}\limits_{(I)} $ $\mathop {\begin{array}{*{20}{c}}
      {\begin{array}{*{20}{c}}
      {\,\,\,\,\,\,\,\,COOC{H_3}\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {H - C - Br\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
    \end{array}} \\ 
      {HO - C - H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {\,\,\,\,\,\,\,COOH\,\,\,\,\,\,\,\,} 
    \end{array}}\limits_{(II)} $

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  • 2
    Number of compounds from the following which will not produce orange red precipitate with Benedict solution is $..............$.  Glucose, maltose, sucrose, ribose,$2-$deoxyribose, amylose, lactose.
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  • 3
    The number of oxygens present in a nucleotide formed from a base, that is present only in $RNA$ is ....
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  • 4
    $\alpha -D$ Glucopyranose and $\beta -D$ Glucopyranose are
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  • 5
    $\alpha -D-$ Glucose and $\beta -D-$ Glucose are 
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  • 6
    $\begin{matrix}
       \begin{matrix}
       C{{H}_{2}}OOCR'  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
    \end{matrix}\,\,\,  \\
       CHOOCR\,\,\,\,\,\,\,  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       C{{H}_{2}}OOCR'''  \\
    \end{matrix}$  $\underset{\text{Hydrolysis}}{\mathop{\xrightarrow{\text{Enzyme}}}}$ $\begin{matrix}
       \begin{matrix}
       C{{H}_{2}}OH  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
    \end{matrix}  \\
       CHOH\,\,\,  \\
       |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
       C{{H}_{2}}OH  \\
    \end{matrix}$  $+\begin{matrix}
       \begin{matrix}
       R'COOH  \\
       +  \\
    \end{matrix}  \\
       R''COOH  \\
       +  \\
       R'''COOH  \\
    \end{matrix}$

    The enzyme used in the above reaction is

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  • 7
    Which will not give purple colour with ninhydrin
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  • 8
    Which of the following statements is right
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  • 9
    Vitamin $B_6$ is known as
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  • 10
    Which of the followng hormones contains iodine
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