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ludmilkaskok [199]
3 years ago
15

To study the molecular mechanism of DNA replication, you incubated soluble E. coli extracts with a mixture of dATP, dTTP, dGTP,

and dCTP, all of which are labeled with the -phosphate group. After a while, the incubation mixture was treated with trichloroacetic acid, which precipitate the DNA but not the nucleotide or very short oligonucleotides. The precipitate was collected and the extent of the radioactively label nucleotide incorporation into the DNA was determined.
a.) If any one of the four nucleotides is omitted from the incubation mixture, would you detect radioactivity in the precipitate? Explainb.) Would 32P be incorporated into the DNA if only dTTP is labeled? Explainc.) Would radioactivity be found in the precipitate if 32P labeled the β and γ rather than the α phosphate of the deoxyribonucleotides? Explain.
Biology
1 answer:
Hoochie [10]3 years ago
8 0

Answer:

Explanation:

A) Since, mixture of dATP, dTTP, dGTP, and dCTP all were labeled; radioactivity can be detected even if one of the four nucleotides is omitted from the incubation mixture. This is because all other three nucleotides contain labeled phosphate and hence, radioactivity can be detected.

B) Yes. If 32P is labeled only dTTP, it can be detected in DNA. Since, dTTP can pair with 'A' nucleotide in DNA.

C) Mostly radioactivity can be detected in DNA when the alpha or terminal phosphates are labeled. It is difficult to detect radioactivity when phosphate groups other alpha like beta or gamma phosphates are labeled. Even if the radioactivity is detected it can be detected in rare cases like 5`end labeling of DNA on gamma phosphate.

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Answer:

Nutrient

Explanation:

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3 years ago
What kind of material forms white sand beaches
hammer [34]
Fish poop.

Tropical white beaches get their pearly white color from the excrement of fish far off of the coast which eat coral and other things that reside on the ocean floor. When they eat they swallow some sand into their mouths as well, and process it with the food they just ate. Their stomachs can't really digest the sand, tiny minute rocks essentially, and thus turn their color white. Or the rock forming the sand can be naturally pigmented a whitish tone as well.
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3 years ago
Find the mean, median, and mode of the following list of values. Round to the nearest tenth if necessary.
grin007 [14]

Answer:

<u>D. </u>

<u>Mean: 24.8</u>

<u>Median: 26</u>

<u>Mode: 26</u>

Explanation:

The mean is the average. To find the average, add up all the numbers and divide by the amount of numbers there are.

30 + 26 + 25 + 11 + 34 + 20 + 26 + 26 = 198

Now, we divide by how many numbers we started out with (8).

198 divided by 8 = 24.75, rounded would be 24.8

To find the median, you arrange the numbers from smallest to largest, and find the middle number like this:

11, 20, 25, 26, 26, 26, 30, 34

As you can see, the middle number is 26.

To find the mode, you arrange the number from smallest to largest, and find the number that appears more often.

11, 20, 25, 26, 26, 26, 30, 34

As you can see, the number 26 appears the most often.

So, we end up with:

<u>Mean: 24.8</u>

<u>Median: 26</u>

<u>Mode: 26</u>

<u></u>

<u></u>

<u></u>

:)

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What process changed the genetics of some rabbits over many generations to give them white or spotted fur and to make them frien
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prey

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predator shark

3 0
3 years ago
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