イントロをひとしきりしゃべったあと、実験内容に入っていくわけですが、何を疑問として取り上げ実験をしようとしたのか、を言う言い方です。
question
And the question is, ..（疑問文）?
And the question I really want to focus on today is …（疑問文）?
address
With these data in hand, we then went to address what’s the pattern of phosphorylation of these channels?
address a question
And the question we really wanted to address is …(疑問文)?
OK, so, the real question that I think we would like to address today is, is this …..?