How many chromatids will visible during metaphase of mitosis

Q1. What would most possible be used for moving a medium-sized molecule from a low concentration on the outside of a cell to a high concentration on the inside of the cell?

Q2. An organism has a diploid chromosome number of 12. How many chromatids will be visible during metaphase of mitosis? How many chromosomes will be visible at the end of anaphase in mitosis? For the similar organism, how many chromosomes will be present, in each gamete, at the end of meiosis? How many chromosomes would be present after fertilization?

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