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anzhelika [568]
3 years ago
6

What explains the functional versatility of rna molecules?

Biology
1 answer:
Ierofanga [76]3 years ago
4 0
Hello there buddy,

<span>RNA is able to hydrogen bond with water (otherwise it wouldn't be soluble), but since water is small and prefers to be able to move around freely, these hydrogen bonds are quite unstable. For that reason, RNA forms much more stable bonds with larger, compatible molecules. Among those, different RNA molecules may bind to DNA or proteins to serve some function, while they can also bind complementary strands of RNA.
</span>
I hope this helps you!

~Jurgen
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The concentration of salt is higher inside a cell than outside the cell. The concentration of water inside the cell is lower tha
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Answer:

C. Water will move into the cell through osmosis. The salt and water concentrations will become similar inside and outside the cell.

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3 0
3 years ago
You do a serial dilution in the same manner as the one in the video. A plate with a sample volume of 10-6 mL produced 43 colonie
8090 [49]

Answer: 43 x 10^6  CFU.

Explanation:

Plate count is a method used to determine the number of viable microorganisms in a sample. When the bacterial concentration is high, serial dilutions are carried out in a 1:10 sequence. <u>Then, the dilutions are successive dilutions keeping the dilution factor constant at each step</u>. Small aliquots of these dilutions are seeded in medium contained in a Petri dish where the bacteria grow forming colonies. Then the plates are incubated and colonies develop both within the agar and on the surface.

If the concentration of the seeded aliquot is too high, the bacteria will grow too much and it will not be possible to distinguish the colonies. <u>However, if the concentration is very low, the number of colony forming units (CFU) may be very low and thus can be counted</u>.

Colony forming units are calculated:

CFU = Number of colonies / (volume seeded on the plate * dilution).

The dilution is 10^-6, the number of colonies counted is 43, and usually the volume plated is 0.1 mL, so we replace that in the equation:

CFU= 43 / (0.1 mL * 10^-6)

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8 0
3 years ago
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