1.1 Cell structure

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Question 38
Medium

A bacterium of Bacillus anthracis is studied under laboratory conditions.

a.

Under optimal growth conditions, a single bacterium divides by binary fission once every 404040 minutes. Calculate how many bacteria will be produced from this single cell after 444 hours.

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b.

A transmission electron micrograph of a spherical bacterial endospore. A horizontal double-headed arrow spanning the outer boundaries is labelled d_E.

The image diameter dEd_{\text{E}}dE​ of the bacterial endospore shown above is measured as 75 mm75\text{ mm}75 mm. The actual (real) diameter of this endospore is 1.25 μm1.25\ \mu\text{m}1.25 μm.

Calculate the magnification of the image. Use the formula: magnification=image sizereal size\text{magnification} = \frac{\text{image size}}{\text{real size}}magnification=real sizeimage size​ Remember that 1 mm=1000 μm1\text{ mm} = 1000\ \mu\text{m}1 mm=1000 μm.

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1.1 Cell structure Questions

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