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adell [148]
3 years ago
12

The photographs left were taken using a transmission electron microscope They show the ultrastructure of some organelles.

Biology
1 answer:
Nezavi [6.7K]3 years ago
3 0

Answer:

True

Explanation:

The transmission electron microscope, is a potential microscope that can make bigger the objects 1 million times. The main use is to analyze metals and other materials, to observe the arrangements of the particles in it. Also some other structures as the viruses can be observed with this microscope.

When the optic microscope can not see some structures like the organelles, then it is used this kind of microscope.

It is used also to observe some organelles, membranes, and other structures.

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Which of the following correctly describes the image below? (5 points)
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A grad student has a culture of E. coli with a total volume of 1,800 mL, and OD reading at 550 nm of 1.7. He transfers 1 mL cult
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Answer:

Explanation:

We'll represent the dilution as the volume transferred/total volume in the tube after transfer. So for the first dilution, 1 ml of culture was added into 9ml of broth bringing the total volume to 10 ml i.e 1/10

For the second dilution, 0.1 mL was added to 0.9mL of broth bringing the total volume to 1mL i.e 0.1/1.0 (this is also the same as 1/10). In relation to the stock culture, this is represented as 1/100 (that is 1/10 (first dilution) * 1/10 (second dilution)

Giving that the same was done for dilution 3 and 4,

third dilution is represented as: 1/10 and the fourth as 1/10 as well

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dilution 4 is 1/10000

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b. the dilution spread onto the agar plate is the fourth dilution, that is, \frac{1}{10000} = 10^{4} or 1.0*10^{4}

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3 0
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