Calculate the number of times the DNA of a modern E. coli cell has been copied accurately since its earliest bacterial precursor cell arose about 3.5 billion years ago. Assume for simplicity that over this time period, E. coli has undergone, on average, one cell division every 12 hours (this is an overestimate for modern bacteria, but probably an underestimate for ancient bacteria).

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#Question id: 2942

#SCPH01 Biochemistry

During mitosis, the breakdown of the nuclear envelope depends on the:

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#Question id: 12573

#SCPH06 I Botany

Which of the following conditions is the most likely indicator of a population in an extinction vortex? 

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#Question id: 1590

#SCPH28 | Zoology

An epitope associates with which part of an antibody?

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#Question id: 14895

#SCPH05 I Biotechnology

The contents in bubble column and air lift reactor are mixed through 

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#Question id: 2646

#SCPH01 Biochemistry

How many stem loop structures play important role in complete system of tryptophan gene regulation?