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Mitosis (the process of chromosomes alignment in a
dividing cell) has been studied for over half a century now but
exactly how it worked has been a mystery. Now
researchers at Cheeseman’s lab have solved the mystery. They
found that it is done by way of protein microtubules that come from
two spindle poles on opposite sides of the cell that laterally latch
onto and separate the copied chromosomes.
These spindles are attached to astral microtubules that are attaché
to the cell membrane. These astral microtubules move the spindles
back and forth to align the spindles and chromosomes down the center
of the cell. The microtubules coming from the spindles then pull the
copied chromosomes apart and such that each of the daughter cells
gets a copy. This process is extremely precise in manipulating
chromosomes, which it has to be for each daughter cell gets a copy
of each chromosome. The failure of this process would likely kill
the cells.
This is just further evidence of high degree of organized complexity
found in a living cell. The process and actions involved with these
microtubules is so precise that it has to be a well controlled
process to work so well. This provides yet another reason why
abiogenesis is thermodynamically impossible. |
