So shouldn't you just place the master radiobuttons like here:

Code:
    <asp:Repeater ID="question" runat="server" OnItemDataBound="question_ItemDataBound">
        <ItemTemplate>
            <tr>
                <td >
                    <%# DataBinder.Eval(Container.DataItem, "Description") %></br>
                    <asp:Radiobutton............................ />
                </td>
            </tr>
            <tr>
                <td align="right">
                    <table border="0">
                        <asp:Repeater ID="answer" runat="server">
                            <ItemTemplate>
                                <tr>                             
                                    <td>                 
                                        <%# DataBinder.Eval(Container.DataItem, "Description") %>
                                        </br>
                                    </td>
                                    <td>
                                        <asp:RadioButton ID="RadioButton1" runat="server" />
                                    </td>        
                                </tr>
                            </ItemTemplate>
                        </asp:Repeater>
                    </table>
                    <br />
                </td>
            </tr>
        </ItemTemplate>
    </asp:Repeater>