Se I'm really sick. I mustI heard thatbe resistant to theantibiotics so theyaren't helping me.antibiotics aregetting weakerWhy aren't antibiotics aseffective as they used to be?Antibiotics are bad.They causeAntibiotics kill mostevery year.mutations in all ofthe bacteria!of the bacteria, thenBACa few resistantbacteria multiply.DD.L.Anderson 2014Natural selection -C.P. #2

The correct answer is D. Antibiotics kill most of the bacteria, but a few resistant bacteria survive…

Answered: I'm really sick. I must I heard that be…

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter9: Gene Expression And Gene Regulation

Section: Chapter Questions

Problem 1CS: There have been recurring cases of mad-cow disease in the United Kingdom since the mid-1990s....

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There have been recurring cases of mad-cow disease in the United Kingdom since the mid-1990s. Mad-cow disease is caused by a prion, an infectious particle that consists only of protein. In 1986, the media began reporting that cows all over England were dying from a mysterious disease. Initially, there was little interest in determining whether humans could be affected. For 10 years, the British government maintained that this unusual disease could not be transmitted to humans. However, in March 1996, the government did an about-face and announced that bovine spongiform encephalopathy (BSE), commonly known as mad-cow disease, can be transmitted to humans, where it is known as variant Creutzfeldt-Jakob disease (VCJD). As in cows, this disease eats away at the nervous system, destroying the brain and essentially turning it into a spongelike structure filled with holes. Victims experience dementia; confusion; loss of speech, sight, and hearing; convulsions; coma; and finally death. Prion diseases are always fatal, and there is no treatment. Precautionary measures taken in Britain to prevent this disease in humans may have begun too late. Many of the victims contracted it over a decade earlier, when the BSE epidemic began, and the incubation period is long (VCJD has an incubation period of 10 to 40 years). A recent study concluded that 1 in 2,000 people in Great Britain carry the abnormally folded protein that causes VCJD. In spite of these numbers, the death rate from VCJD remains low. It is not clear whether this means that the incubation period for the disease is much longer than previously thought, or whether they may never develop the disease. How can a prion replicate itself without genetic material?
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Katelyn had been working for Dr. Johnson for a month, and while she had become quite good at measuring inhibitionzones, she didn’t know why she was doing all this work. She had gotten very curious after she began doing all themeasurements on a new set of antibiotics. # is experiment involved infecting mice with MRSA and tracking how theMRSA grew over time.Data were collected by counting the cells of MRSA taken from $ uid samples from the mice. # e cells were measuredby taking one gram of the $ uid and spreading it over plates, but now Katelyn counted the colonies that grew on theplate after 24 hours. Because there were so many, she actually measured the colonies as “log CFU/g.” A CFU is acolony forming unit, or essentially a cell that will divide into a colony that can be seen. Because there can be so many,Katelyn measured them on a logarithmic (log) scale. # e raw data in her lab notebook looked like the following:Table 1. E% ect of treatment on MRSA in mice after 24 hours of drug…
3 Ed What causes antibiotic resistance? - Kevin Wu E ANTIBIOTICS BACTERIA VS. Watch on YouTube How do antibiotic-rich environments like hospitals speed up the rate at which superbugs increase their percentage of the bacteria population? $ increase the rate of mutations in bacteria 4 R % 5 T 16 G 6 17 & Y H U TEDED Share 8 J 9 no insert K O
ve3000: LevelSet C O b portal.achieve3000.com/kb/levelset/ Websites Launch Meeting -Z. A Achieve3000: Level. E Backbeats | Learnin. G spodify - Google Se. 6 New Tab N Race Now - 100% F Read It! Scientists have discovered that people carry a staggering variety of bacteria on their hands. They found a total of 4,742 different species. Individual test subjects averaged 150 different types, with women averaging more types of bacteria than men. Scientists are not sure why but have offered several possible explanations. The difference may have something to do with acid on the skin. A man's skin generally has more acid than a woman's skin does, and bacteria do not thrive as well in more acidic environments. Another cause could be the differences in sweat and oil produced. Makeup use could also make a difference, as could skin thickness. Do It! Scientists have created many A hypotheses formulas C. patents D routines Submit
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi.Symptoms of the disease include weakness and loss of appetite, victims often died of heart failure.Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria fromthe blood of patients with beriberi. The injected chickens became sick. However, so did a group ofchickens that were not injected with bacteria.One of the scientists, Dr. Eijkman, designed a new experiment based on his ownobservations. Before the experiment, all the chickens had eaten whole-grain rice, butduring the experiment, the chickens were fed polished rice. Dr. Eijkman researchedthis interesting case and found that polished rice lacked thiamine, a vitamin necessaryfor good health.1. State the question or problem that Dr. Eijkman investigated. 2. What was the original hypothesis? 3. What was the manipulated (independent) variable and the responding (dependent) variable? 4. Write a…
In terms of microbial pathogenicity, molecular Koch's postulates are a set of experimental criteria that show: A microbe is the aetiological agent of a disease A gene encodes a product that contributes to disease A gene encodes a product that contributes to immunity to a disease A mutation does not contribute to disease
During viral gene therapy (using the adenovirus system), does the new DNA that you introduce into cells get incorporated into the organisms genome? O Yes O No
Which of the following options best describes the process of selection for antibiotic-resistant bacteria in the presence of an antibiotic? Antibiotic resistance occurs when the human body resists an antibiotic; the bacteria are not under selective pressure Antibiotic-resistant cells are naturally stronger, so they always take over in the presence of antibiotic- sensitive cells Antibiotics kill off sensitive cells, while resistant bacteria survive and multiply O In the presence of antibiotics, most bacterial cells react by becoming resistant before they start dividing again MacBook Air DD 000 80 F9 000 F8 F7 F5 F6 F3 F4
two viruses infect the same cell. This results in the production of new viruses that contain genetic material from both viruses. This event is known as: O transduction O transformation O antigen drift O conjugation O antigen shift
In a series of infection experiments, a researcher discovers that the ID50 value for the infectious bacterium Parasiticum mucoides is 2,000, and that the ID50 for another infectious bacterium, Donoteatum thisbacterium, is 150. Given these data, a person exposed to 1,000 bacteria of each type would be more likely to be infected by which bacterium? O Parasiticum mucoides O Both infections are equally likely Donoteatum thisbacterium There is no way to know given the information provided MacBook Air DD F9 80 000 000 F8 F7 F6 F5 F4 F3 *
The initial origin of all antibiotic resistance genes involving enzymes, pumps or altered targets was spontaneous mutations. O True O False

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