importance of a probe
in hybridization process, molecular biologist label a short fragment of DNA or RNA, usually 10-1000 bases long tagged with a radioactive or fluorescent molecules. this fragment is usually referred to as hybridization probe.probe important both in southern and northern blotting processed because it is used to identify a certain sequence of DNA or RNA in a pool several sequences that have been obtained using nuclease.
process of labeling DNA sequence with a probe
after the DNA strand has been cut into several fragments using enzyme DNA nuclease, the fragments are separated using gel electrophoresis and then denatured using hcl to obtain strands. the single strand are then transferred to nylon membrane that has positive charge. the next step is where probes come in. to detect the DNA sequence of interest the nylon membrane is treated with solution containing tagged probes. since the probes have complementary sequence to the target sequence, it bind to that DNA sequence and detected later using X-ray film.
The density is the relation mass/volume.
Then you can modifiy the density of a material by either affecting the mass or the volume.
If you increase the volumen while keeping the mass constant, the density will decrease (because you are increasing the denominator of the fraction).
Also, you can decrease the mass while keeping the volume constant to decrease the density (because you are decreasing the numerator of the fraction).
Then the answer is decrease the mass or increase the volume, while the other is kept constant.
No. Because plant roots do not have access to direct sunlight. And sunlight is needed for photosynthesis.
The answer would be: accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer
<span>The number of melanocyte cells is not much compared to keratinocytes. That is why melanocytes secrete dark melanin granules that will be spread into keratinocytes, not to itself.
The nutrient should be provided by the blood vessels of dermis skin. There should be no problem with pH or temperature either.</span>
