Explanation:
Actually, two organelles transport protein in a eukaryotic cell (multicellular organisms): (rough) Endoplasmic Recticulum and Golgi Apparatus.
The (rough) endoplasmic recticulum transport the newly synthesized proteins to the golgi apparatus from where they are transported to the various regions of the cell or outside the cell. Smooth endoplasmic recticulum is not associated with protein transport.
Proteins, carrying a signaling sequence, are transported from the endoplasmic recticulum, packaged into vesicles, to the golgi apparatus (or golgi complex or golgi bodies). These proteins are modified by enzymatic reactions as they move through the golgi apparatus. After processing, these proteins are either excreted from the cell or are sent to various locations within the cell.
It is difficult to pinpoint the location of these organelles within the cell as locations are different for mammals, plants, yeasts, etc. Generally, the golgi apparatus is found adjacent to the endoplasmic recticulum, which in turn is found throughout the cell but has a higher density near the nucleus.
Answer:
The original water sample contains 830,000 cells per milliliter.
Explanation:
A sample of well water is tested for its bacterial content in a plate count assay. A one-milliliter sample of the water is diluted in a 1:10 dilution series. One milliliter of the fourth dilution tube is plated in a pour plate. After incubation, the plate has 83 colonies, indicating that the original water sample contained 830,000 cells per milliliter.
Specific chemicals are bound by carrier proteins and transferred on one side of the membrane. The conformational changes they go through next enable the molecule to cross the membrane and exit on the other side.
How carrier protein facilitate the diffusion?
When a molecule diffuses, it usually moves from a high concentration location to a low concentration area until the concentration is the same everywhere in the space.
Contrary to channel proteins, another form of membrane transport protein that is less selective in the molecules it transports, carriers are proteins that move a particular material through intracellular compartments, into the extracellular fluid, or across cells. Carrier proteins are found in lipid bilayer cell structures such cell membranes, mitochondria, and chloroplasts, just like other membrane transport proteins.
Therefore, carrier proteins can facilitate the diffusion of glucose or other substances into the cell.
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There are several types of microscopes: compound microscopes 0 the most commonly used microscope, uses light illumination and the image that is seen is two dimensional, stereoscope- uses light illumination and the image that appears is 3 dimensional, confocal microscope - uses laser light ,scanning electron microscope - uses electron illumination.
Traits are inherited trough the parents genes that are passed to the offspring trough both parents reproductive cells, that contain genes in their nucleus.
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