Yes, we can quote examples in comprehension, as far as I have learnt, but if deemed necessary. Otherwise, it's better to answer in your own words and understanding, because that's why it is a question of comprehension. The examiner wants us to write what we have comprehended from the given passage.
You can add extra, but relevant, information to your answer as well. whether it was given in the passage or not. Remember, it must be pertinent and should substantiate your answer.