Exposure of Zebrafish Nuclei to Meiotic Cytosol Resulted in Phosphorylation

question 40

Multiple Choice

Exposure of zebrafish nuclei to meiotic cytosol resulted in phosphorylation of NEP55 and L68 proteins by cyclin-dependent kinase 2. NEP55 is a protein of the inner nuclear membrane, and L68 is a protein of the nuclear lamina. What is the most likely role of phosphorylation of these proteins in the process of mitosis?

• A) They enable the attachment of the spindle microtubules to kinetochore regions of the centromere.
• B) They are involved in the disassembly and dispersal of the nucleolus.
• C) They are involved in the disassembly of the nuclear envelope.
• D) They assist in the movement of the centrosomes to opposite sides of the nucleus.

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