A person answered these questions from the article, he answered one of them wrong, I want you to find a wrong part and answer why is it wrong?
Questions:
What two main points did you understand from the abstract?
What methods were used to conduct the research? Why were they appropriate?
What key finding did you see in the results?
Provide a summary of the author’s conclusions.
Were the conclusions accurate for the results presented in the paper?
Answers based of article:
In this short abstract, the authors, Ada Olins and Donald Olins , declare that they have observed “linear arrays of spherical chromatin particles” in isolated genetic material from rat thymus, rat liver, and chicken red blood cells. The authors also suggest measurements for the diameter of these particles and the width of the strands between adjacent molecules. The existence and definition of these particles, along with suggestions regarding their physical properties, provide foundational evidence of nucleosomes as the basis for compacting DNA.
Regarding methodology, the authors used electron microscopy. This was an appropriate in that electron microscopes allow for the investigation of the structures of cells and large molecules – and, in this case, the reliable visualization and measurement of the chromatin units. Further, the authors used genetic material from chicken blood, rat liver and calf thymus to isolate and study the nuclei at different phases of mitosis and using a range of methods to stain and visualize the structures in a manner that gave them confidence that the ultimate visual of “beads on a string” was a “native configuration” and not the result of the procedures that they are using.
