Pap Smears
Regarding pap smears, they give you the option of not providing results if you desire, however should you develop cervical cancer or other such complications within your time in the company you will not be covered by insurance.
If you've already had the test done in your home country then you can simply ask your doctor to fax through the results, as you won't be tested in Dubai when the medical checks take place. The next time you'll be required to be tested in Dubai is 3 years after the date of the latest pap smear done in your home country.
Hope that helps.