Is either right-to-left or west
If you read the sentence from left-to-right, the first letters of the last five words spell "wrong"
If you read from right-to-left, the last letters of the (now first) five words spell "right" (credit to @Gareth McCaughan)
Which leads me to believe that
The correct answer is found by flipping the sentence and reading from right to left
I concluded that the correct answer is likely to be any of right-to-left (because we had to read the sentence from right to left), counter-clockwise (because nuclear spin is rotational), or west (because that's the direction you go if you go from right-to-left on a typical. The author of the question has since clarified that as they are organelles, they don't have nuclear spin, and either right-to-left or west is acceptable