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Depending on the type of microscope or dye that is being used to visualise cell structures parts of the cell can look darker because they are regions with higher affinity for dyes or there is simply less light getting through them because it's denser (optical microscope). If using an electron microscope areas with more electrons come are seen as darker because those are areas that the electron beam is more blocked than in lighter areas.
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Which parts of the cell stain darker than others?
The nucleus
Where is DNA in a prokaroytic cell?
In a prokaryotic cell (a prokaryote), the DNA is found floating freely in the cytoplasm. It can be in the form of circular plasmids (circles of DNA) and there are occasionally some darker regions in the cytoplasm of prokayote where most of the DNA can be found. Prokaryotes have no nucleus.
What color is an onion's nucleus?
Unless you stain a cell each organelle is more or less colour-less. Under the microscope the nucleus might appear a little bit darker.
Which regions of the chromosomes will typically be in the form of hereochromatin?
There are certain regions that are tightly coiled. When the DNA is stained with a dye these regions appear in a dark band and are called hetrochromatin. They are the part of the chromosome that are not actively expressed in the cells. A heterochromatin in one cell may be functional in other cells.
How can you tell which cell in a worksheet is the active cell?
The cell borders are highlighted, or if a range of cells are selected, the active cell will be a different colour than the others, usually being white. The name of the active cell will always appear in the name box.
What is the name of the darker circles inside a cheek cell?
The nucleus.
An epithelial cell can be divided into two functional regions They are the surface and the surface?
An epithelial cell can be divided into basal and apical functional regions.
Where is the cell nucleolus?
It is in nucleus.You can see a darker circular area in nucleus when observed an eukariyotic cell through a microscope.
When text is longer than the width of a column and text wrapping is turned off?
It depends, if the next cell is blank that the cell will extend normally to allow the text to be displayed.However, if the cell is occupied it will display something along the lines of ##### to indicate the column width is not sufficient; the solution to which are as follows:Extend the column width by placing your arrow on the line next to the letter until your cursor changes and click and drag to the desired width.Set the cell to 'wrapped text' by right clicking on the cell and going to format, and extend the row height using the same method as mentioned in 1. but with the row instead of the column.Reduce the length of the text in the cellReduce the font size of the text in the cell
Why do cheek lining cells appear purple?
The nucleus at the central part of the cheek cell contains DNA. When a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope. Although the entire cell appears light blue in color, the nucleus at the central part of the cell is much darker, which allows it to be identified.
What are the four regions of roots?
the four regions of the root are root cap, cell division, elongation and specialization
Is sickle cell anemia related to genetics?
Yes. Sickle Cell is limited to people of darker skin , mostly of African descent.
