Microbes in Human Welfare Questions and Answers

bacteria that tests positive for oxidase can use O cytochrome c oxidase nitrate oxygen pyruvate pyruvic acid as a final electron acceptor

you are doing the nitrate reduction test You do NOT see air bubbles in the nitrate broth after incubation This tells you O you need to add other reagents before you can interpret the result bacteria turned nitrate into nitrite bacteria cannot use nitrate in respiration O bacteria turned nitrate into nitrogen gas

The goal of drug metabolizing enzymes is typically to make the drug more lipid soluble less active more active more water soluble less water soluble more active more taste less filling more water soluble less active

extra credit You suspect that your unknown bacteria might be contaminated by another bacteria What would you do to find out if this is the case transfer your bacteria to a tube of nutrient or soy broth transfer bacteria onto a soy or nutrient slant do a streak plate add methyl red to your bacteria put your bacteria into a deep or thioglycolate broth

The diagram shows two populations of bacteria April 2008 This diagram reveals that natural selection operated on the April population of bacteria This le A a slight decrease in the amount of diversity in the June population a slight increase in the amount of diversity in the June population B C 5 breeding cycles June 2008 a complete lack of diversity in the June population D the same amount of diversity in the June population

T F A Sephadex G 25 gel filtration column can be used to separate alcohol dehydrogenase 1kD from amylase 23kD 29 30 T F Cheese is made by action of the enzyme rennin on the milk protein casein under alkaline conditions 31 T F I studied so hard for this course I more than deserve an A grade

Match the two columns regarding viruses Obligate intracellular parasites They have genetic information The genetic information is protected Limited genetic information Choose Choose Choose Choose

Which of the following is NOT a step in bacterial cell division a Cell elongation b Replication of the genetic material c Disappearance of nuclear envelope d Splitting apart of two new daughter cells

Which of the following best describes the pattern of microbial death a The cells in a population die at a constant rate b Not all of the cells in a culture are killed c The pattern varies depending on the antimicrobial agent d All the cells in a culture die at once e The pattern varies depending on the species

For this matching question consider these commonly prescribed drugs which inhibit protein synthesis Match each drug with the correct description and mechanism of action Chloramphenicol Aminoglycosides Tetracyline Macrolides 1 2 3 Binds to 505 ribosome and prevents peptide bonding Interferes with tRNA attachment Large bulky structure blocks the ribosomal tunnel Changes the shape of the 30s

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Shown below is a branched reaction pathway in which both D and E are important for cell survival Imagine that E m be maintained below a certain concentration above which it becomes toxic Which of the following is the best way to ensure this E1 E4 are the enzymes that catalyze each of the reactions Always assume that if an enzyme is subject activation it is inactive in the absence of activator and if an enzyme is subject to inhibition it is always active in the absence of the inhibitor E3 D 1 E1 E2 A B C E4 Allosteric inhibition of Enzyme E1 by D O Allosteric inhibition of Enzyme E4 by E Allosteric activation of Enzyme E4 by D Allosteric inhibition of Enzyme E1 by E E

cember 12 2022 Sports stars go after eir goals They give their all to score nts and win Many have another aim to make a difference in the lives of hers Some athletes who give back are bert Pujols Christine Sinclair and smack Biyombo bert Pujols port Baseball eam St Louis Cardinals ometown Santo Domingo Dominican cepublic Cardinals Credit left AP Photo Jeff Roberson center AP Photo Fernando Llano right AP Photo David Zalubowski Albert Pujols left Christine Sinclair center and Bismack Biyombo nght support causes that mean a lot to them Albert Pujols hit more than 700 home uns during his career Only four players n Major League Baseball history have hit that many Now the home run mero lends a helping hand to people in his home country Q QUESTION 1 What is the main idea of this article A Some sports stars hold world records B Some sports stars work to help others C Pro athletes come from many countries D Pro athletes play many different sports SUBMIT

What is the decolorizer in the spore stain procedure Acid alcohol Acetone alcohol Acid Acetone Water

6 A In paragraph 10 of New Alert System Designed to Warn Residents of Storms and Other Dangers what does the author mean when he says the new system is telecommunications based 1 point A It communicates with a specific group of people B It communicates by emphasizing the strength of a storm C It communicates through a network that has been approved by weather experts D It communicates by sending information to a device over long distances

reduces the number of vegetative forms reduces the number of endospores kilk all vegetative forms None of the choices are correct increases food nutrient value

Microbial death occurs when there is a change in appearance Opermanent loss of reproduction All of these occur no movement a decrease in size

Cyanobacteria are a type of bacteria that had a profound effect on the development of life as we know it What specifically is important with respect to cyanobacteria and the emergence of complex organisms OCyanobacteria conduct photosynthesis OCyanobacteria have existed for billions of years Cyanobacteria are found in stromatolites O Cyanobacteria are prokaryotes

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The graphic is a grassland in Africa It is A a closed s tem with regards to matter B an open system with regards to energy and matter C a closed system with regards to energy

Provide an example of a microorganism that could act as an opportunistic pathogen ude met cave opportunistic infection but act are an opportunic pathogen

Clostridium botulinum is an anaerobic soll bacteria Which of the following describes how Clostridium botulinum produces ATP Clostridium botulinum uses its mitochondria to meet its ATP needs Clostridium botulinum uses glycolysis to meet its ATP needs Clostridium botulinum must have oxygen to meet its ATP needs O Clostridium botulinum uses oxidative phosphorylation to meet its ATP needs

Courses General Biolog GOCELLULAR RESPIRATION CUS Fill in the correct nu Total number of each component in the Ox Pyruvate

In humans straight hair ss and curly hair cc are codominant traits that result in hybrids who have wavy hair sc Cross a curly hair female with a wavy haired male a Complete a Punnett square for this cross Page 2

are 10 multiple choice questions on Question 5 What do the Gram stain acid fas

multiple choice questions on this qui Question 3 Which type of microscope is the most wi Electron Dark field

Right handed is a dominant trait RR Rr Left handed is a recessive trait rr In the pedigree below the shaded symbols show the right handed trait From the pedigree below what do you know about the genotype of 4 1 Point 3 7 4 8 2 heterozygous right handed female homozygous right handed female heterozygous right handed male homozygous right handed male 5 9 6 10

Most medically important organisms are Photoautotrophs Chemoautotrophs Photoheterotrophs Chemoheterotrons

The autoclave setting required to kill all organisms and endospores except prions is 134 degrees Celsius 17 psi for 15 minutes True False

Worth 0 25 Points Given the components below what type of media is this Choose the best answer Media Components 3 65 mL H 0 4 55g MgCl2 7 82g H PO4 12g NaCl and 2 76mg NaOH Selective media Enrichment media Chemically defined media Differential media

reproduce sexually resulting in multiple unique offspring Examine the diagram below Tan body with normal wings Parents Ebony body with vestigial wings Offspring possibilities Tan normal Ebony vestigial Tan vestigial Ebony normal a Explain how it is possible for fly parents to produce multiple offspring with different traits How is this process different from asexual reproduction 2 points b A parent fruit fly has eight chromosomes 2n Describe how the process of meiosis produces gametes n and state how many chromosomes each gamete contains 3 points

If Listerine kills 99 9 of germs in 30 seconds then what is the D value of Listerine If there were 1 million bacteria on your teeth how long would you have to leave the Listerine on to have 1 bacteria left

Pros and Cons of diagnostic tests Compare/contrast the PROS and CONS of these types of diagnostic tests - can they be dangerous? Overused? Long wait time? How does this technology affect society? Are there implications on the human body? Include a relevant diagram - 15% of page

One problem with newly discovered antibiotics is that they were only effective against a few microbes, whereas original antibiotics were broadly applicable. If an antibiotic only kills one, or a few types of bacteria, it is known as: Broad spectrum Resistant Chemotherapeutic Narrow spectrum

Diagnostic test(s) Provide a description of 2 diagnostic test used to identify/diagnosis the disease/illness/condition What is the main function of this test - treatment/curing/diagnostic only What are the risk factors associated with the diagnostic test What are the benefits associated with the diagnostic test Include a relevant diagram of treatment option(s) - 15% of page

Which of the gram positive rods has high resistance to antibiotics and other antimicrobial drugs? Select all that apply. Bacillus anthracis Clostridium difficile Clostridium botulinum Clostridium tetani Mycobacterium tuberculosis

Match the possible solution for slowing antibiotic resistance to its mode of action. > New antibiotics > Phages > Vaccine > Resistance inhibitor 1. Blocks degrading enzymes produced by bacteria. 2. Infect and kill specific bacteria. 3. Prevents disease from occurring. 4. Chemical produced by one microbe to kill another microbe.

According to the "Why Vaccines Work" video about vaccines, what is the minimum percentage of a population that should be vaccinated for measles to make the disease disappear over time? Was this percentage reached in the US in 2014? What is that percentage now? Link 95%; No, it was 91%; Now it is 91.5% 50%; yes, it was 91%; Now it is 98% 90%, Yes, it was 91%; now it is 91.9% 80%; yes, it was 91% ; Now it is 70%

The single most important measure to prevent the spread of an infection is?

What is a noticeable similarity in the structures of one of the drugs from the list to Psuedoephedrine, or perhaps on functional groups that seem to be common throughout these compounds. Naproxen Morphine Codeine Hydrocodone Hydromorphone Tramadol Carfentanil Oxycodone Oxycontin Fentanyl Heroin Methamphetamine Psuedoephedrine Ibuprofen

True or False: Because the microbiome is important for fitness, many organisms have developed specific strategies for passing the microbiome on to progeny.

Dr. Chung is a biologist who works on diseases of the liver. She is studying infectious agents that invade liver cells. She has narrowed down the cause of the disease she is studying to a type of virus or a protist. Which of the following characteristics would be the BEST choice for Dr. Chung to use in determining whether the infectious agent she is studying is a virus or a protist? It infects both liver cells and red blood cells. It has proteins in its outermost layer. It is capable of changing over time. It has DNA as its genetic material.

The most common way microorganisms are transmitted to foods is by: A. Liquids dripping on foods in the refrigerator B. Food workers' hands C. Sneezing or coughing on foods D. Improper food tasting procedures in the kitchen

Which of the following is used by some bacteria to survive the acidity of the stomach? peptidoglycan in cell wall capsule lipids in outer membrane two of the above A, B and C of the above

You wish to enumerate the phage in a stock culture. You do 4 10-fold serial dilutions of the original phage culture, then perform a standard plaque assay using these samples. The next day, you observe 127 plaques on the most dilute plate. What was the phage concentration in the original phage culture? Show your calculations.

Streptococcus pneumoniae is Select one: a. alpha-hemolytic on blood agar. b. found in up to 50% of people as normal biota. Oc. a gram-positive diplococcus with a capsule. d. a pathogen with endotoxin. e. All of the choices are correct.

Which of the following microbial forms has the highest resistance to physical and chemical controls? Select one: a. Naked viruses b. Protozoan cysts c. Fungal spores d. Bacterial endospores e. Yeast

Which is the correct order for the application of reagents in the Gram stain? Select one: a. Crystal violet, safranin, iodine, alcohol/acetone b. Crystal violet, alcohol/acetone, iodine, safranin c. Crystal violet, iodine, alcohol/acetone, safranin d. lodine, safranin, crystal violet, alcohol/acetone e. Safranin, crystal violet, alcohol/acetone, iodine

Alcohol is a waste product produced by yeast in the presence of ___ and the absence of ____ Oxygen, Glucose Glucose, Oxygen CO₂, Oxygen ATP. CO₂

Between April 1 and May 15 of one year, 22 children in three states developed diarrhea, fever, and vomiting. The children had each received pet ducklings. Gram-negative, facultative anaerobic bacteria were isolated from both the patients' and the duck's feces; the bacteria were identified as serovar C2. What is the genus of these bacteria? Staphylococcus Listeria Salmonella Escherichia Clostridium