Cytoskeletal filaments provide the basis for cell movement. For instance, cilia and (eukaryotic) flagella move as a result of microtubules sliding along each other. In fact, cross sections of these tail-like cellular extensions show organized arrays of microtubules.
The cytoskeleton of eukaryotic cells is made of filamentous proteins, and it provides mechanical support to the cell and its cytoplasmic constituents. All cytoskeletons consist of three major classes of elements that differ in size and in protein composition.
Microtubules are the largest type of filament, with a diameter of about 25 nanometers (nm), and they are composed of a protein called tubulin. Actin filaments are the smallest type, with a diameter of only about 6 nm, and they are made of a protein called actin. Intermediate filaments, as their name suggests, are mid-sized, with a diameter of about 10 nm. Unlike actin filaments and microtubules, intermediate filaments are constructed from a number of different subunit proteins.
The cytoskeleton is a structure that helps cells maintain their shape and internal organization, and it also provides mechanical support that enables cells to carry out essential functions like division and movement.
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Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls.
Answer:
4 chemicals
Explanation:
There are mainly 4 steps of gram staining.
1- crystal violet stain drained on the heat fixed slide.
2- then wash the slide and use iodine.
3- then wash the slide with water and use acetone as a decolorizer.
4- then use safranine as a counter stain.
So there are a total of 4 chemicals used named crystal violet, iodine, acetone, and safranine.
Protons!! when protons pass through ATP synthase it makes ATP molecules out of ADP molecules. brainliest is always appreciated :)
Explanation:
This doesn't mean he made us by what he looks like this means that he thought of us and decided what we were going to look like. This is what it means by "in his image".
