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MIMG 101 FINAL Examination with Guaranteed Pass Solutions Updated.

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What are the 2 main differences between unicellular and multicellular developmental programs? - Answer - Differentiation: Cells in unicellular end up as the same cells; in multicellular they differentiate for different functions - Decision making: Unicellular doesn't coordinate with others (senses only for itself), Multicellular does coordinate with others (cells signal to each other). What type of bacteria are streptomycetes and why are they of interested to study? - Answer gram positive soil bacteria; make a lot of antibiotics What is the purpose of antibiotics that bacteria create - Answer antibiotics are used to compete with other microbes How do streptomycin and tetracycline work as antibiotics? - Answer both bind to active sites on the ribosome and prevent peptide elongation How does nystatin work as an antibiotic? How does its structrure relate to function? - Answer forms pores in membrane; it is a very large hydrophobic molecule and dissolves into the membrane How does erythromycin work as an antibiotic - Answer inhibits cell wall synthesis How do you detect antibiotics? - Answer 1) Streak antibiotic producing bacteria 2) Streak different type of bacteria perpendicular to the antibiotic streak 3) Incubate and grow to see which bacteria aren't able to grow or have their growth inhibited substrate mycelium - Answer cell type that depletes the environment of its nutrients; "vegetative" What are the three types of cells in the developmental program of streptomycetes? - Answer substrate mycelium, aerial mycelium, spores What are the terminally differentiated cells of the streptomycetes? - Answer substrate mycelium, aerial mycelium (they cannot form spores)

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MIMG 101 Final Exam Questions All
Solved Correctly 2026 Updated.
Epidemiology - Answer -the study of the occurrence, distribution, and determinants of health
and disease in population (public health, analyzing public health, not treatment of disease)

◦ A major job is to carry out disease surveillance (observations, reporting of disease)



Epidemiologists - Answer -carry out disease surveillance (observation, recognition, and
reporting of diseases as they occur), use data to formulate effective public health measures for
disease control, prevent outbreaks/epidemics, control them if they occur



History of epidemiology - Answer -Hippocrates was first to attempt to explain disease
occurrence from rational viewpoint than supernatural viewpoint (no Gods, influenced by natural
situation) - diseases could be influenced by environmental and host factors



Miasma theory - Answer -diseases were caused by noxious vapors called miasma

◦ This "bad air" comes from rotting organic matter or other sources of bad odor

◦ Clean cities, keep the air fresh to prevent disease



Dr. Jon Snow, MD - Answer -British physician, founder of modern epidemiology

◦ Investigated the causes of the Broad Street Cholera Outbreak of 1854 in London (diarrhea)

◦ Did not believe in the miasma theory; germ theory was not developed yet (he thought: could
it be water? Sanitation was not a thing, where is it from?)



Cholera Outbreak - Answer -Jon Snow began to suspect contaminated water was at fault for
the cholera outbreak (created a map where people were dying)

◦ He investigated where individuals were getting sick and found a cluster around a water pump
on Broad Street.

◦ He never identified the causative agent, but he was able to convince the city to disable the
pump (because everyone is dying around it, and outbreak was contained)

-how is it spreading, but not cause of disease, only how its spreading and why = epidemiology



Prevalence - Answer -the total number of new and existing disease cases in a population in a
given time period



Incidence - Answer -the number of new cases of a disease in a population in a given time
period

,Morbidity - Answer -the incidence of a disease in a population, how is the disease growing



Mortality - Answer -the incidence of death in a population



Endemic disease definition - Answer when the disease is constantly present (the flu, colds)



Epidemic - Answer when the disease simultaneously infects an unusually high number of
individuals in a population (when a disease suddenly emerges, states or country)



Pandemic - Answer when an epidemic is widespread, usually globally



Influenza - Answer ◦ The flu (caused by the influenza virus) is an example of an endemic
disease (always and comes back)

◦ There can be localized outbreaks of influenza (just ucla for example) that classify as epidemics

◦ If the epidemic spreads far enough, it can become a pandemic

◦ 1918 Spanish Flu Pandemic

◦ 2009 Swine Flu Pandemic



Disease Transmission: what are the three methods? - Answer 1. Person to Person

◦ Direct contact - sexual activity, handshakes

◦ Indirect contact - fomites (inanimate objects that were contaminated with a viable pathogen:
utensil, or phone)

◦ Airborne droplets - sneezing, coughing

2. Vehicle

◦ Waterborne - contaminated water source

◦ Foodborne - contaminated food (fungal spores)

◦ Airborne - fungal spores

◦ Soilborne - contaminated soil in contact with open wound (skin infection)

3. Vector

◦ Arthropods/insects - fleas, ticks, mosquitoes



Public Health Advances: Germ theory*** - Answer ◦ Led to improvements in sanitation,
increased focus on hygiene, and implementation of vaccines (better sanitation and hygiene,
wash your hands)

◦ The development and use of antiseptics and antibiotics

◦ Improved mechanisms to detect and monitor diseases

, ◦ Mathematical monitoring of disease spread (how fast: control disease outbreaks)

• A major accomplishment was the significant decline in deaths from infectious diseases

• Coincided with a steep drop in childhood mortality

• Public health and epidemiological advances haven't just helped the fight against infectious
diseases... but also heart disease



Framingham Heart Study*** - Answer ◦ Longitudinal study to identify heart disease risk
factors (follow individual over their lives)

◦ Started in 1948 with 5209 adult participants in Framingham, MA.

◦ Participants were 30+, no cardiovascular disease at baseline

◦ Offspring cohorts were established in 1971 (2nd gen.) and 2002 (3rd gen.)

◦ Special cohort established in 1994 to study race and heritage as risk factors (diversity)



Framingham Heart Study: Lead to these cautious facts - Answer ◦ 1960s: Cigarette smoking
increased heart disease risk.

◦ 1970s: High blood pressure increased stroke risk.

◦ 1980s: High HDL cholesterol reduced risk of death.

◦ 1990s: Enlarged left ventricle increased risk of stroke.

◦ 2000s: Prehypertension associated with increased risk of cardiovascular disease.

◦ 2010s: Sleep apnea increased risk of stroke.

◦ 2010s: Discovery of many genes underlying risk factors for cardiovascular disease

◦ As time has gone by, the technology has advanced, as has the tests they are able to conduct
on the participants



Infectious Diseases are still a problem** - Answer -Global travel and use of blood banks,
among other technological advances, have all contributed to outbreaks of diseases

◦ Infectious diseases are a leading cause of death in developing countries

◦ Less infrastructure for sanitation, hygiene, vaccines, etc

-not past this because microbes can mutate



Emerging diseases** - Answer diseases that suddenly become prevalent



Reemerging diseases ** - Answer diseases that were previously under control but suddenly
appear as a new epidemic (polio, measles)



Disease Surveillance in the United States*** - Answer -The CDC tracks disease trends
reported by health professionals, provides the latest disease information, and forms public

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