You are confirming, under penalty of perjury, that the information included in your responses is truthful, and that you have personal knowledge of such. You should definitely consult with your attorney before signing anything. If you don't have one yet, GET ONE! Good luck.
That language is called a verification. It is required for written discovery responses. It refers to your answers being truthful, not the questions. If a question assumes facts, object to the facts it assumes in your answer. You can consult with a attorney on a limited scope basis to help you with discovery. You would remain a pro per, but could get help with unfamiliar issues, like the one you are having now. For more information see http://www.courts.ca.gov/1085.htm Many attorneys on Avvo offer LSR services.
Please note that attorney answers to questions, such as this one, are for general purposes only and do not establish an attorney-client relationship. Always seek advice from an attorney in person, over the phone or via email and do not rely on blogs, internet legal research, or posts such as this one. Thanks!