Hi,
I have a query about how to remove submit button, actually I dont want submit button below each question. It should be displayed at the end of exercise and then show the result.
And the second query is when I import the bundle on moodle PPT effect is seen. How to avoid scrollbars or make it look like moodle itself.

The scoring and evaluation of answers will be done only by clicking the submit button, there is no possiblity of removing this button as it won't serve the ultimate purpose...

With regard to moodle, I guess you can refer the moodle support forum, there are xml programming examples to modify or remove scroll bars.

If you don't want a submit button then you're going to have to build the question and responses yourself.
Best place to start would be with a piece of paper and design the work/data flow of what you want to achieve.
A VERY basic outline for a multichoice item would be
* Make a text list of the questions
* Make a hot spot/button set for each option with an onclick action to set a variable.
* You'd also need to nest the onclick show objects to change a graphic for text box / radio select objects. Example options A B C click A to select and B C deselect, change your mind and change to B and A abd C deselect. The complexity depends on wether its a single or multiple answer.
* Repeat for a set of page or questions.
* Add an evaluate button which onclick will check the value in the variable against the correct answer.
* Score and pass the variable to the master SCORM variables.

It might be a pain but once its done the pages would be reusable as a part of other modules you might make.
Courselab is very capable Rapid Development platform and extremely capable if you have the imagination and skills.
Moodle will display the module as you tell it to. Within moodle (keeping the shell of moodle around it)it will probably have scroll bars as the display is constrained. Try having it open as a discrete window or changing the display parameters to match the modules size, I think thats an option in the import and display dialogue.