\documentclass[a4paper]{article}

  \usepackage[utf8x]{inputenc}    
  \usepackage[T1]{fontenc}
  \usepackage[ngerman]{babel}
  \usepackage[german=guillemets]{csquotes}
  \usepackage[lang=DE,box,separateanswersheet]{automultiplechoice}    

  \usepackage{titlesec}

%\makeatletter
%\renewcommand\AMC@qaff{\alph{AMCquestionaff})}
%\makeatother

  \def\AMCbeginQuestion#1#2{\par\noindent{ \thesection.#1} #2\hspace*{1em}}
  \def\AMCformQuestion#1{\vspace{\AMCformVSpace}\par {\thesection.#1:} }    


\begin{document}


  \element{general}{
   \AMCsection{Question 1}
    This should be (text concerning) question 1 
    
    \begin{question}{question1a}
      text concerning question 1.a) 
      \begin{choiceshoriz}
	\correctchoice{right} 
	\wrongchoice{wrong}
	\wrongchoice{wrong}
	\wrongchoice{wrong}
      \end{choiceshoriz}
    \end{question}
    \begin{question}{question1b}
      text concerning question 1.b) 
      \begin{choiceshoriz}
	\correctchoice{right} 
	\wrongchoice{wrong}
	\wrongchoice{wrong}
	\wrongchoice{wrong}
      \end{choiceshoriz}
    \end{question}
    \AMCnumero{1}
   \AMCsection{Question 2}
    This should be (text concerning) question 2
    
    \begin{question}{question2a}
      text concerning question 2.a) 
      \begin{choiceshoriz}
	\correctchoice{right} 
	\wrongchoice{wrong}
	\wrongchoice{wrong}
	\wrongchoice{wrong}
      \end{choiceshoriz}
    \end{question}
    \begin{question}{question2b}
      text concerning question 2.b) 
      \begin{choiceshoriz}
	\correctchoice{right} 
	\wrongchoice{wrong}
	\wrongchoice{wrong}
	\wrongchoice{wrong}
      \end{choiceshoriz}
    \end{question}
  }

\onecopy{1}{    


  \insertgroup{general}
  \clearpage

\AMCformBegin    

% start answer sheet -----------------------------

  {\large\bf Antwort-Bogen:}
  \hfill \namefield{\fbox{    
      \begin{minipage}{.5\linewidth}
	%Firstname and lastname:
	Vor- und Nachname: 
	
	\vspace*{.5cm}\dotfill
	\vspace*{1mm}
      \end{minipage}
    }}
  \vspace{0.3cm}

% end answer sheet -----------------------------

\AMCform    

\AMCcleardoublepage    
}  

\end{document}
