The simple answer is: NO
AFAIK text in charts can be formatted using elemntary tags (e.g. like <B> for bold) but that feature doesn't exist in text boxes where your QuestionDesc field would end up eventually. See also this recent discussion: Re: Formatting a portion of text in a textbox
And in any case, QlikView isn't RTF-capable, so it seems that even if the program would support text formatting, you're in for a complex conversion either in the load script (arghhh...) or before turning the data into a QVD.