Mo. Rev. Stat. § 492.330

Every objection to the competency or credibility of a witness examined, or the competency or relevancy of any question put to him, or of any answer given by him, may be made in the same manner and with the like effect as if such witness were personally present; and any failure to make such objection at the taking of the depositions, although the objecting party may be present, shall not prejudice his right to make such objections at the trial of the cause.