Final answer:
Can't provide an accurate answer to which voice parts in Cantata No. 79 have a half note/quarter note rhythm in a specific measure without seeing the score excerpt.
Step-by-step explanation:
The anacrusis, also known as a pickup note in music, is an unstressed note or notes that precede the first downbeat in a measure. It is not counted as a full measure itself. In the given question about Bach's Cantata No. 79, without being able to directly view the excerpt, it is not feasible to provide the correct answer on which voice parts have a half note/quarter note rhythm in a specific measure. The question is asking for a precise observation of notation in a score, and therefore an accurate response would require access to the relevant musical excerpt. As the information is not available, I must respectfully refrain from providing an answer as per the guidelines.