The breakdown of the nuclear envelope during cell division is primarily associated with the phosphorylation of **lamins**, a class of proteins that form the nuclear lamina. This phosphorylation process is mediated by cyclin-dependent kinases (CDKs), which are crucial for the regulation of the cell cycle.

1. **Phosphatase**: This is an enzyme that removes phosphate groups; it is not responsible for the breakdown of the nuclear envelope.

2. **Cyclin**: Cyclins are regulatory proteins that activate CDKs; they do not directly lead to the phosphorylation of proteins involved in nuclear envelope breakdown.

3. **DBRP**: This option does not commonly relate to nuclear envelope breakdown.

4. **Lamin**: This is the correct choice as lamins undergo phosphorylation by CDKs during mitosis, leading to the disassembly of the nuclear envelope.

**Final Answer**: **Lamin**

Question

The breakdown of the nuclear envelope during cell division is primarily associated with the phosphorylation of **lamins**, a class of proteins that form the nuclear lamina. This phosphorylation process is mediated by cyclin-dependent kinases (CDKs), which are crucial for the regulation of the cell cycle.

1. **Phosphatase**: This is an enzyme that removes phosphate groups; it is not responsible for the breakdown of the nuclear envelope.
  
2. **Cyclin**: Cyclins are regulatory proteins that activate CDKs; they do not directly lead to the phosphorylation of proteins involved in nuclear envelope breakdown.

3. **DBRP**: This option does not commonly relate to nuclear envelope breakdown.

4. **Lamin**: This is the correct choice as lamins undergo phosphorylation by CDKs during mitosis, leading to the disassembly of the nuclear envelope.

**Final Answer**: **Lamin**

Knowee AI · Accepted Answer

The breakdown of the nuclear envelope during cell division is primarily associated with the phosphorylation of **lamins**, a class of proteins that form the nuclear lamina. This phosphorylation process is mediated by cyclin-dependent kinases (CDKs), which are crucial for the regulation of the cell cycle.

1. **Phosphatase**: This is an enzyme that removes phosphate groups; it is not responsible for the breakdown of the nuclear envelope.
  
2. **Cyclin**: Cyclins are regulatory proteins that activate CDKs; they do not directly lead to the phosphorylation of proteins involved in nuclear envelope breakdown.

3. **DBRP**: This option does not commonly relate to nuclear envelope breakdown.

4. **Lamin**: This is the correct choice as lamins undergo phosphorylation by CDKs during mitosis, leading to the disassembly of the nuclear envelope.

**Final Answer**: **Lamin**

The breakdown of the nuclear envelope is due to the phosphorylation of which protein by a CDK?Group of answer choicesPhosphatasecyclinDBRPLamin

Question

The breakdown of the nuclear envelope is due to the phosphorylation of which protein by a CDK?

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