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Ivahew [28]
3 years ago
15

Where do scientists obtain primers to be used in pcr and in this technique answer?

Biology
1 answer:
Llana [10]3 years ago
6 0
<span>In order to happen DNA synthesis of a wanted portion of DNA in laboratory, the DNA polymerases that preform that synthesis need to have a an existing strand of nucleotides already in order to attach new DNA nucleotides. To that existing strand of nucleotides we call primer. In a lab, scientists synthesize DNA primers through specific sequences that bind to other sequences of a single-thread DNA molecule and these are the primers commonly used to perform PCR.</span>
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A red blood cell with an osmolarity of 300 mOsM (non-penetrating solutes) swells but does not lyse when placed in a 300 mOsM sol
Mashcka [7]

Answer:

See below for answer

Explanation:

<u>A. 200 mOsM NaCl</u>

This solution is hypotonic to the red blood cell (RBC) with penetrating solute. The RBCs will swell up and burst because the water will move into the cells.

<u>B. 400 mOsM urea</u>

This solution is hypertonic to the RBCs with non-penetrating solutes. Water will leave the cells via osmosis and the cells will shrink and appear shriveled.

<u>C. 100 mOsM urea plus 200 mOsM NaCl</u>

This time both penetrating and non-penetrating solute is present. The solution is isotonic to the RBCs and although there will be movement of water between the cells and the solution, there will be no overall change in the concentration of water for each and no change in appearance of the cells.

<u>D. 300 mOsM urea</u>

The RBCs will not lyse nor shrivel as again the solution is isotonic to the RBCs.

8 0
3 years ago
please can somebody help me on my workbook pages it’s due soon! please put your social media down below thank you.
hammer [34]

Answer:

My instagram is _rubenboii

Explanation:

4 0
3 years ago
Why is Acinetobacter bamannii bacteria dangerous.
shepuryov [24]
Because it can cause serious infections in the lungs, blood and our brains...It may also cause urinary tract and infections in wounds.
8 0
3 years ago
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Provide explanations of genotypes and phenotypes.
Korvikt [17]
The phenotype is the physical appearance of an organism, while the Genotype is the genetic composition of an organism. Phenotype is observable and are the expression of the genes of an individual. So even the organism with the same species may differ, with a minute difference in their genotype. This is the main difference between the two.

We can notice one’s hair colour, eye colour, height, weight, skin colour, etc. but cannot look at genes responsible for these characters, so the observable physical look is the phenotype while the unnoticed genes responsible for such characters present in the DNA of cell of the individual is genotype.

To explain the above lines, here is the simple example of a pure red colour flowering plant (RR) is crossed with the white colour flowering plant (rr). The result of the Genotype of the F1 generation will be – Rr (Hybrid red colour), and the Phenotype of the F1 generation will be the – Red colour flowering plant.

Genotype and phenotype are the two very closely related and similar-sounding words, but their meaning is different. Our earth has a dynamic variety of organisms, present in soil, water and on land. But as the genome of each organism is different, and so there phenotypes also whether it’s their colour, height, weight or other morphological features.
4 0
3 years ago
Read 2 more answers
Which of the following statements represent evidence supporting the endosymbiotic theory? Check all that apply.
Tems11 [23]

Answer:

The statement that says " The mitochondrion contains a circular chromosome that has bacterial DNA sequences" is true among the all statement given above.  

Explanation:

The Endosymbiotic theory that is other wise known as the symbiogensis illustrates the occurrence of the eukaryotic cell from the prokaryotic cells. Mitochondria and plastids are the most studied example in support of this theory. This theory explains that the aforementioned organelles are formed as they are taken inside in one another by the prokaryotic cell. Some of the evidences in support of this theory are mentioned below:

  • Phylogenetic similarity between the mitochondria and chloroplast to the proteobacteria and cynobacteria respectively.  
  • Ability of these organelles to divide only through binary fission as the bacterial population.
  • The associated ribosomes are similar to the bacterial ribosomes.  
  • Presence of porins in these organelles similar the bacterial membrane.  

5 0
3 years ago
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