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DNA Replication

  • 06-11-2007 4:25pm
    #1
    JSK 252
    Registered Users, Registered Users 2 Posts: 1,257 ✭✭✭


    Im totally confused at the moment about what to believe. We were doing it in class today ( Im in 5th year by the way ) when discussing about mitosis and my teacher said that the chromosones duplicate during the early prophase but the book says that it happens during interphase when the cell is resting and not reproducing. When I questioned him about this he said that the book was wrong.


Comments

  • #2
    Tree
    Moderators, Science, Health & Environment Moderators Posts: 4,754 Mod ✭✭✭✭Tree


    which book is it? i know for a fact that one of the lc biology books is full of errors. Gave bio grinds last year and had to keep photocopying stuff to correct the book.


  • #3
    JSK 252
    Registered Users, Registered Users 2 Posts: 1,257 ✭✭✭JSK 252


    Modern Biology by Joe Reville

    and I got this other book in a cancer society charity shop for 3 euro:D!:

    New Senior Biology by Siobhan Scott and Kevin Maume.


  • #4
    EamonnKeane
    Closed Accounts Posts: 950 ✭✭✭EamonnKeane


    There are 4 phases in the cell cycle:

    G1 (first growth)

    S (synthesis of DNA)

    G2 (second growth)

    M (mitotic phase), which is subdivided into P, M, A, T and cytokinesis.

    Chromosomes are replicated in S phase, i.e. long before the prophase of mitosis.


  • #5
    EamonnKeane
    Closed Accounts Posts: 950 ✭✭✭EamonnKeane


    So your teacher is wrong and the book is correct


  • #6
    JSK 252
    Registered Users, Registered Users 2 Posts: 1,257 ✭✭✭JSK 252


    EamonnKeane wrote: »
    So your teacher is wrong and the book is correct

    Good man Eamonn thanks for that.


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  • #7
    vodochilie
    Closed Accounts Posts: 24 ✭vodochilie


    he's only an lc student! pro,met,ana,tela ..... he is taught that S phase is a dormitory phase in the LC, man what a bad course, I hated photo and resp back then because they wouldn't go into any depth so it was hard to understand it, but once you get into it in college the mechanics are basic enough


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