var questions = new Array();
var choices = new Array();
var answers = new Array();
var response = new Array();

questions[0] = "1) According to the passage, RNA interference";
choices[0] = new Array();
choices[0][0] = "can prove fatal for an organism.";
choices[0][1] = "only occurs in the corn rootworm.";
choices[0][2] = "requires the injection of a chemical agent.";
choices[0][3] = "is caused by the Bt toxin.";
answers[0] = choices[0][0];

questions[1] = "2) Which of the following does NOT make it more likely for pest populations to develop a resistance to toxins?";
choices[1] = new Array();
choices[1][0] = "the occasional use of pesticide sprays";
choices[1][1] = "having the toxin permanently present in the crop";
choices[1][2] = "relying on a single pest management technique";
choices[1][3] = "using a pesticide over a wider area";
answers[1] = choices[1][0];

questions[2] = "3) The toxin in the new strain of GM corn ";
choices[2] = new Array();
choices[2][0] = "is known to be effective against a wide range of pests.";
choices[2][1] = "is also known as the Bt toxin.";
choices[2][2] = "has caused allergic reactions in some humans.";
choices[2][3] = "is not destroyed by corn rootworm digestion.";
answers[2] = choices[2][3];

questions[3] = "4) The passage implies that";
choices[3] = new Array();
choices[3][0] = "in some areas the new GM corn is now ineffective.";
choices[3][1] = "corn rootworm cannot develop a resistance to RNA interference.";
choices[3][2] = "very few farmers agreed to grow GM crops.";
choices[3][3] = "the Bt toxin affects a range of pests.";
answers[3] = choices[3][3];

questions[4] = "5) In the opinion of the author, the companies marketing the new corn";
choices[4] = new Array();
choices[4][0] = "may have made a misleading statement.";
choices[4][1] = "hold the key to solving the problem of hunger.";
choices[4][2] = "are ignorant of alternative pest management techniques.";
choices[4][3] = "have been unfairly targetted by anti-GM campaigners.";
answers[4] = choices[4][0];

// response for getting 100%
response[0] = "How about applying for a job at Michigan?";
// response for getting 90% or more
response[1] = "Excellent."
// response for getting 70% or more
response[2] = "Well done. You are comfortably over the pass mark.";
// response for getting over 50%
response[3] = "You should do a little more revision before the exam.";
// response for getting 40% or more
response[4] = "More work needs to be done to make the grade.";
// response for getting 20% or more
response[5] = "Don't give up. The grammar isn't too difficult to learn.";
// response for getting 10% or more
response[6] = "Oops!";
// response for getting 9% or less
response[7] = "Oops!";