Database Design for Questions and Answers
We have an application at our workplace that does a similar thing. It works by having a table that contains a list of all possible questions like such:

CREATE TABLE QUESTIONS
(
   ID INT NOT NULL PRIMARY KEY,
   SUMMARY NVARCHAR(64) NOT NULL UNIQUE,
   DESCRIPTION NVARCHAR(255) NULL
);


Then you have an ANSWERS and a QUESTIONAIRES table defined using the same structure above. Once you have these two tables you then define a table to hold the list of question/answer possibilties as such:

CREATE TABLE QUESTION_ANSWERS
(
   ID INT NOT NULL PRIMARY KEY,
   QUESTION INT NOT NULL REFERENCES QUESTIONS(ID),
   ANSWER INT NOT NULL REFERENCES ANSWERS(ID)
);


Once you have these you can then create a table to contain the responses as such:

CREATE TABLE RESPONSES
(
   QUESTIONAIRE INT NOT NULL REFERENCES QUESTIONAIRES(ID),
   RESPONSE INT NOT NULL REFERENCES QUESTION_ANSWERS(ID)
);


This will give you maximum flexibility allowing you to add new questions and answers without having to change your database design frequently. It can get a bit complicated if you need to version the questions/answers but this should give you a good foothold to work from.

I hope this helps you.