Many enzymes require cofactors for their proper working. Different cofactors belong to different groups. Pick the odd one:

A. Vitamin A

B. Coenzyme A

C. NAD+

⃝D. Haem group ⃝

Why does the skin of your finger shrink when you wash clothes for a long time?

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase

18. how do the cells in meiosis differ from the cells in mitosis?