What would you expect to find inside the nucleus?
The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.
What stain shows the nuclei?
Methylene blue
Methylene blue – stains animal cells to make nuclei more visible.
What happens in the nucleus of a cell?
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information.
How do you stain a nucleus?
Some dyes for nuclear staining can stain the nucleus of living cells while others require cells to be fixed and stained. When performing immunofluorescence staining of fixed cells, DAPI can be used as a nuclear stain. Propidium iodide (PI) is commonly used for measurement using a flow cytometer.
Have a look at the stained cells Why are the cells stained in pink quizlet?
Leaving the decolorizing solution on too long will result in the over-decolorizing of the Gram-positive cells, causing them to lose their purple stain. Upon the addition of the safranin stain, all cells will stain pink.
What is the function of the nucleolus in the cell?
The nucleolus is the most conspicuous domain in the eukaryotic cell nucleus, whose main function is ribosomal RNA (rRNA) synthesis and ribosome biogenesis.
What happens to nucleolus during mitosis?
At the beginning of mitosis, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the cytoplasm.
What would happen if the nucleus was removed from a cell?
It is the brain of the cell and controls most of its functions. If the nucleus is removed from the cell then the cell will not be able to function properly, it will not be able to grow. Also, the cell will not know what to do and there would be no cell division. Gradually, the cell may die.
When a cell ingests a bacterium What role does the nucleus play?
When a cell ingests a bacterium, what role does the nucleus play? The nucleus houses the chromosomes; each is made up of proteins and a single DNA molecule.