What are the limits on which maximum cell size depends?
Cell size is limited by a cell’s surface area to volume ratio. A smaller cell is more effective and transporting materials, including waste products, than a larger cell . Cells come in many different shapes. A cell’s function is determined, in part, by its shape.
What do the rough endoplasmic reticulum Golgi apparatus and lysosomes have in common?
What do the rough endoplasmic reticulum , Golgi apparatus, and lysosomes have in common ? They are constructed of interrelated membranes. The protein is folded, then packaged for transport to the Golgi apparatus . What is the relationship between the Golgi apparatus and the plasma membrane?
Which microscope would be best suited to the measurement of the internal structures of a bacterial cell?
transmission electron microscope
What is the detailed structure of cells visible only with an electron microscope?
Mitochondria are visible with the light microscope but can’t be seen in detail. Ribosomes are only visible with the electron microscope.
Which type of cell is larger?
What is the smallest cell?
Answer: The Cerebellum’s Granule Cell is the smallest cell in the human body that is between 4 micrometers to 4.5 micrometers long. The RBC ‘s size also found roughly 5 micrometers. Most scientists suggest that sperm is the smallest cell in terms of volume.
What is the relationship between ER and Golgi apparatus?
The Golgi complex works closely with the rough ER . When a protein is made in the ER , something called a transition vesicle is made. This vesicle or sac floats through the cytoplasm to the Golgi apparatus and is absorbed.
What is the main function of lysosomes?
A lysosome is a membrane-bound cell organelle that contains digestive enzymes . Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.
What is the role of the Golgi apparatus in the cell?
The golgi apparatus is a membrane bound organelle found in most cells . It is responsible for packaging proteins into vesicles prior to secretion and therefore plays a key role in the secretory pathway.
What are two methods used to study cells?
Two types of electron microscopy—transmission and scanning—are widely used to study cells . In principle, transmission electron microscopy is similar to the observation of stained cells with the bright-field light microscope.
What structures can be seen with a light microscope?
You can see most bacteria and some organelles like mitochondria plus the human egg. You can not see the very smallest bacteria, viruses, macromolecules, ribosomes , proteins, and of course atoms.
What kind of microscope can see cells?
Electrons have much a shorter wavelength than visible light , and this allows electron microscopes to produce higher-resolution images than standard light microscopes. Electron microscopes can be used to examine not just whole cells, but also the subcellular structures and compartments within them.
Can you see viruses with a compound light microscope?
Viruses are small. Because the wavelengths of visible light range from roughly 300 to 800 nanometers, viruses aren’t exactly visible under normal lighting. Only optical fluoresce microscopes can see inside a virus , and then only indirectly, using dye, which cannot actually penetrate a virus .
Why cells do not have exactly the same structure?
All the cells contain the same genetic material and all of them are from one original cell that started as a fertilized egg, but they look different and act different from one another. This is differentiation. Scientists still do not understand perfectly why cells in the same organism decide to differentiate.
What is the advantage of an electron microscope?
Electron microscopes have two key advantages when compared to light microscopes : They have a much higher range of magnification (can detect smaller structures) They have a much higher resolution (can provide clearer and more detailed images)