What cell structures are actually seen under the compound light microscope?
What cell structures are actually seen under the compound light microscope?
Thus, light microscopes allow one to visualize cells and their larger components such as nuclei, nucleoli, secretory granules, lysosomes, and large mitochondria. The electron microscope is necessary to see smaller organelles like ribosomes, macromolecular assemblies, and macromolecules.
Which structure can only be seen through a microscope?
Mitochondria
When onion cells are observed with a compound light microscope which laboratory technique is used to make the nucleus more visible?
When onion cells are observed with a compound light microscope, which laboratory technique is used to make the nucleus more visible? Lugol’s iodine solution was added to the cells. A student used a light microscope to observe a cell under low power.
Can you guess which part of the cell gives it shape?
Cell membrane and cell wall in animal cells and plant cells respectively give the cell its shape.
Why do cheek cells not have a cell wall?
As in all animal cells, the cells of the human cheek do not possess a cell wall. A cell membrane that is semi-permeable surrounds the cytoplasm. Unlike plant cells, the cytoplasm in an animal cell is denser, granular and occupies a larger space. The vacuole in an an animal cell is smaller in size, or absent.
What is the natural color of a cheek cell?
clear
Can iodine be used to stain cheek cells?
The stain cannot penetrate live cells however, in dead cells, it can penetrate the cell membrane and the cells will be stained blue. It is also used to study RNA and DNA in gel or under the microscope. Iodine is a useful stain as well.
What stain do you use for cheek cells?
Methylene blue stains negatively charged molecules in the cell, including DNA and RNA. This dye is toxic when ingested and it causes irritation when in contact with the skin and eyes. The cells seen are squamous epithelial cells from the outer epithelial layer of the mouth.
Why do cells need to be stained prior to microscopy?
The most basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope. Cells may also be stained to highlight metabolic processes or to differentiate between live and dead cells in a sample.