Answer:
Because the structure of a prokaryotic ribosome is not the same as that of a ribosome in an animal cell some antibiotics can block protein synthesis in bacteria without harming the eukaryotic host.
Explanation:
Antibiotics are medicines used to cure infectious diseases by killing bacteria or preventing their replication. One of the <u>mechanisms of action of antibiotics is to act on ribosomes and inhibit protein synthesis</u>.
The ribosomes of prokaryotic cells are 70S, with a ribosomal RNA (rRNA) content of 66-68%, while the ribosome of the animal cell has a sedimentation coefficient of 80S, with an rRNA percentage of 60%. This difference makes it possible for some antibiotics, such as aminoglycosides, to affect bacterial protein synthesis but not the animal cell's protein synthesis.
<em> The other options are not related to the difference in ribosomes between prokaryotic cells and animal cells.</em>
Structure X is only found in plant cells, and structure Y is found in plant and animal cells.
Again, I do not know 100% but My best guess would be Anser choice E.
"Big Bang Theory"
Though I may be wrong.
8. (F) Facilitated diffusion: For water to travel across the cell membrane at a substantial rate, the water molecules travel through protein channels known as aquaporins.
9. (S) Simple diffusion: While water molecules are polar, they are also very small. One fact not mentioned in the video is that some water molecules are able to squeeze directly through the phospholipid bilayer due to their small size.
10. (S) Simple diffusion: Charged ions are traveling through a cell membrane with the concentration gradient.
11. (A) Active transport: Cells lining the gut need to take in glucose, but at a certain time, the concentration of extracellular glucose is lower than the concentration already stored in the cells.
12.(F) Facilitated diffusion: At a certain time, glucose is in a high concentration outside of a cell and needs to travel through the membrane into the cell.
The above choices are made based on the basic definitions of active transport, facilitated diffusion and simple diffusion.
Active transport: The movement of the ions or molecules to a region having higher concentration across the membrane requiring the help of energy or enzymes is active transport.
Facilitated diffusion: This type of transport involves passive movement of the molecules or is a type of passive transport where the movement of the molecules takes place from higher to lower concentration region occurs with the aid of a carrier molecule such as a transport or carrier protein.
Simple diffusion: This process involves movement of ions or molecules from high concentration region to low concentration region through a semipermeable membrane.
Mammals indeed do have lungs to breathe ma’am:)