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Who benefits from a mutation that causes antibiotic resistance in bacteria?
The bacteria benefits.
How is antibiotic resistance observed in bacteria in light of Darwinian selection theory?
A random mutation causes one bacterium to become resistant to an antibiotic. Then all the others are killed when the antibiotic is introduced to the environment. The mutated bacterium is free to reproduce and soon many members of that species are resistant to that antibiotic.
A mutation that causes disease resistance in potatoes is a?
harmful mutation
What causes the mutant form of disease-causing bacteria to become predominant?
The forces that affect bacteria population are competition, mutation and selection, just like any other population affected by the theory of evolution. In a large population of bacteria, some individuals will be mutated to have resistance to antibiotic drugs (or any other drug). This is a disadvantage to the individual as long as there is no antibiotic drug in the surroundings. In this case there is mutation but no selection. When an antibiotic drug is given to a patient, selection is being done in the evolutionary aspect of the bacteria. Only the drug-resistant mutants survive, since the selection does not affect them. All the non-mutant bacteria die; the mutants have no competition, and can flourish undisturbed.
What are the reasons for emergence of antibiotic resistance?
Why is the human body resistant to antibiotics? Because synthetic medicines tend to be quite simple, the bacteria that should be affected by the antibiotic are able to build a defense against it.
Why some colony grow inside the zone of inhibition?
Some bacteria within the colony may possess inherent resistance to the antibiotic, allowing them to survive and grow within the zone of inhibition. Additionally, mutations in the bacterial DNA can confer resistance, enabling the growth of colonies within the zone. Horizontal gene transfer mechanisms like conjugation can also introduce resistant genes to susceptible bacteria in the colony, leading to their growth within the zone of inhibition.
How is a mutation harmful to a organism?
Not all mutations are harmful. A mutation the give the organism antibiotic resistance, for example, is quite helpful. A different mutation that causes a necessary protein to misfold may result in death. In general mutations that affect proteins that are necessary for life will result in the death of the organism. One such mutation is in the protein p53 which is necessary to prevent a cell from growing uncontrollable (cancer). A mutation in p53 could result in a cell with damaged DNA to reproduce - this is what we call cancer.
Is and example of inherent resistance?
One example of inherent resistance is antibiotic resistance in bacteria. Some bacteria naturally possess genes that allow them to survive exposure to certain antibiotics, reducing the effectiveness of those drugs in treating infections. This inherent resistance can make it challenging to treat bacterial infections and necessitates the development of new antibiotics.
What is the type of mutation that causes hemophilia?
There is no single type of mutation that causes Hemophilia A. It is not the type of mutation but rather the location of the mutation within the genetic code.
What causes antibiotic-associated colitis?
When antibiotics are given, most of the resident bacteria are killed. With fewer bacteria to compete with, the normally harmless Clostridia difficile grow rapidly and produce toxins.
What are some pathogenetic bacteria?
Some pathogen bacteria are:Escherchia coli - Causes stomach upsets.Staphylococcus aureus - the antibiotic resistant version of this organism is called MRSA and causes problems for patients in hospital.Clostridium difficile - another stomach upset causer
What is the type of mutation that causes Digeorge syndrome?
Deletion Mutation causes DiGeorges Syndrome.
