he enzymes involved in ubiquitinylation of cell-cycle proteins are(A) E1 and E2 only(B) E1 and E3 only(C) E1 and E4 only(D) E1, E2 and E
Question
he enzymes involved in ubiquitinylation of cell-cycle proteins are(A) E1 and E2 only(B) E1 and E3 only(C) E1 and E4 only(D) E1, E2 and E
Solution
The process of ubiquitination involves three main types of enzymes: E1 (ubiquitin-activating enzymes), E2 (ubiquitin-conjugating enzymes), and E3 (ubiquitin ligases). These enzymes work together in a cascade to attach ubiquitin to target proteins, which can then be recognized and degraded by the proteasome. Therefore, the correct answer is (D) E1, E2, and E3.
Similar Questions
The role of ubiquitin in cell cycle control is to:Group of answer choicesstimulate cyclin synthesisdephosphorylate cyclindegrade cyclinphosphorylate cyclin
Role of proteins involved in control of cell cycle
The process of ubiquitination largely in part serves the purpose ofGroup of answer choicesacting as a protein marker for degradationdetermining protein localization inside cellscovalent modificationa and cnone of the above
Increased activity of ubiquitin-proteosome system
What role does the proteasome play in the regulation of the cell cycle?Group of answer choicesIt degrades ubiquitinated cyclin as part of a positive CDK/cyclin feedback mechanism.It degrades ubiquitinated CDK as part of a negative CDK/cyclin feedback mechanism.It degrades ubiquitinated cyclin as part of a negative CDK/cyclin feedback mechanism.It degrades ubiquitinated CDK as part of a positive CDK/cyclin feedback mechanism.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.