DUMET Medical DUMET Medical Solved Paper-2002

  • question_answer
    DNA synthesis occurs in :

    A)  prometaphase  

    B)  prophase

    C)  interphase     

    D)  telophase

    Correct Answer: C

    Solution :

    DNA synthesis (replication) occurs in S-phase (synthesis phase) of inter phase in cell cycle- The synthesis of histone proteins are also take place during S-phase. The breakdown of nuclear envelope signal the commencement of prometaphase. At this stage the chromosome are violently rotated and osciliated back and forth between the spindle pole. The appearance of then threat like condensing chromosomes marks the first phase of mitosis called prophase. During prophase proteins of the trilaminar kinetochores start depositing or organising on the centromere of each chromosome. Telophase begins with end of polar migration of the daughter chromosomes. Two new nuclei and nuclear membrane reorganise.


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