This article will show you how to create a multiple choice question. For more in depth instructions see here.
For more in depth instructions see here.
Step 7 - Select the default mark
This sets the maximum mark for this question.
Step 11 - Add Feedback
You can add feedback under each choice as well to help students understand where they went wrong or why they were correct.
For information on adding questions to your quiz see the 'Adding Questions To Your Quiz' section of Creating Quiz Questions