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Marianna [84]
3 years ago
6

If a researcher has a DNA sample with a concentration of 0.6 micrograms per microliter, how many microliters of DNA must be tran

sfered to conduct a 50 microliter reaction if the final concentration should be 3.9 nanograms per microliter
Biology
1 answer:
Art [367]3 years ago
7 0

Answer:

0.325 microliters

Explanation:

1 microgram = 1000 nanograms

DNA sample concentration= 1000 X 0.6 = 600 nanograms / microliters

We need a total of 50 microliter reactions, and the concentration should be 3.9 nanograms per microliter.

So, we need total 50 X 3.9 = 195 nanograms in 50 microliters.

Therefore, it required 195 / 600 = 0.325 microliters of DNA sample to be transferred.

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Phosphorus (P) is the element with the atomic number 15. Which of the
viva [34]

Explanation:

   Isotopes:

                          ₁₅³¹P   and     ₁₅³²P

     Given parameters:

       ₁₅³¹P                                                   ₁₅³²P          

   Mass number = 31                                    32

   Atomic number = 15                                 15

The two atoms are isotopes. Now let us derive numbers of their subatomic particles

                       ₁₅³¹P                                             ₁₅³²P  

Protons              15                                                 15

Electrons           15                                                  15

Neutrons         (31-15) = 16                               (32-15) = 17

Because they are isotopes, they differ in the number of neutrons alone.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences  in the number of their neutrons.

We clearly see that the mass number and number of neutrons pertaining to the atom differs. This makes them isotopes.

Learn more:

Isotope brainly.com/question/1915462

#learnwithBrianly

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2 years ago
If "dependent assortment" occurs, how do alleles of different genes behave?
QveST [7]
U can easily fihdbthe andnebron sheiks

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Which state of matter has the most densely packed particles?<br><br> Gas, solid, liquid, or none?
Leviafan [203]
I think it’s solid. Hope this helps. :)
8 0
3 years ago
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FinnZ [79.3K]

Answer:

  • <u>Medullary hormones</u>: the epineprhin and the norepineprhin. <u>Five different effects that these hormones produce are:</u> increase heart rate, produce cardiac muscle contraction, elevate blood preasure, increase breathing, dicrease digestive activity, increase metabolic rate.
  • <u>The most important mineralocorticoid secreted by the adrenal cortex: </u>aldosterone.
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Explanation:

The epineprhin and norepineprhin are the most important medullary hormons. They are so important because of the functions that they have. They are responsable for the increase of heart rate and if it´s movement, along with digestive and metabolic activity.

Thanks to the aldosterone which is the most important secreted minaralocoricoid, kidneys conserve water and sodium and eliminate posatium.

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