Bacteria can make their own folic acid, which is required for nucleic acid synthesis, but humans cannot and instead have to inge
st folic acid. Trimethoprim is an antimicrobial drug that inhibits one of the enzymes involved in making folic acid. This drug inhibits the growth of bacterial cells but not human cells. This is an example of
This drug inhibits the growth of bacterial cells but not human cells. This is an example of the selective toxicity of antibiotics.
Folic acid is an essential component for all cells to synthesize nucleic acids (DNA and RNA). Human cells do not synthesize folic acid and they take it through food. Bacterial cells are impermeable to folic acid and hence they need to synthesize their own folic acid.
Antibiotics target the metabolic pathway of folic acid synthesis in bacteria by inhibiting one of the enzymes in this pathway. These drugs are only toxic to bacteria but not to humans because humans do not have the folic acid synthesis pathway and hence they do not get affected by the action of the antibiotic. This is known as the selective toxicity of antibiotics.
These antibiotics are designed in a way to target the infecting agent (bacteria) while rendering minimal or no toxicity to the host (humans).
When have the intentions to analyze the sea floor an try to measure the difference of materials present on the seafloor we woulds see or analyze that if we are moving away from the land outwards into the deep down ocean then we would see the sequence of the in the following way continental shelf - continental slope - abyssal plain.
A multicellular organism develops from a single cell (the zygote) into a collection of many different cell types, organized into tissues and organs.During development, cells use both intrinsic, or inherited, information and extrinsic signals from neighbors to "decide on" their behavior and identity.
