Biology question and answers for October 28, 2023
- Q resuspended the bacteria in 0.5ml of Solution 1 and then added lysozyme to a concentration of 50g/ml. If we had a lysozyme stock concentration of 10mg/ml, calculate the stock volume...
- Q After growing an enteric organism overnight in SIM media, Jeniffer added a few drops of Kovacs reagent. The top portion of the culture media turned red. Which of the following...
- Q How would you culture capnophiles bacteria in the lab?In TSA medium (the one that we frequently use in the lab) exposed to airIn a sealed jar where oxygen is chemically...
- Q During this bacterial growth phase, death rate is much higher than growth rate because there is very limited or no food.death phaseLag phaseLog phaseStationary phaseFoodless phase
- Q What group of microorganisms do not usually call the skin home?SpirochetesMicrococciStaphylococciCorynebacterium
- Q The purpose of studying an urban microbiome is to study the diversity of microbiomeand observe the change of the microbiome in the urban area over years.TrueFalse
- Q Choose the most accurate answer about Bile esculin medium?a) It's a differential medium for bacteria that hydrolyze esculin and a selectivemedium for Gram negativeb) It inhibits the growth of Gram-negative...
- Q How would you classify the distribution and appearance of the growth in broth of this bacterium?FlocculentUniform fine turbiditySedimentPellicle
- Q The proportion of microorganisms killed after a sterilization treatment can be estimated from whichone of the following standards.Lethality factor (F)Z valueCritical valueInactivation factor (IF)Sterility assurance level (SAL)
- Q Why do Gram-negative bacteria tend to be less sensitive to antibacterial drugs in general?a. Many antibacterial compounds can pass through the thin peptidoglycan layer of a Gram-positive bacterial cell.b. Many...
- Q Which term best describes a drug that kills microbes?a. microbiocidalb. microbiostaticc. narrow-spectrumd. broad-spectrume. antibiotic
- Q What is the purpose of including phenol red in triple sugar iron (TSI) medium?a. Phenol red ferments the sugars.b. Phenol red can be reduced to hydrogen sulfide.c. Phenol red is...
- Q What are the four basic steps involved in this bacterial identification lab?
- Q After completing sample A, perform DNA sequence analysis on any two of the other fivesamples (B, C, D, E or F).Write in the letter of the sample you choose and...
- Q rCptA was produced in E. coliTrueFalse
- Q Why facultative anaerobes prefer to grow in the presence of oxygen than without oxygen?Because the highest number of ATPS per glucose is produced by aerobic respirationBecause oxygen is their preferred...
- Q 5. When bacterial cultures are grown in the lab, products of bacterial metabolism can build up makingthe environment too acidic or alkalinefor the bacteria to thrive. What is the best...
- Q Bacteria that are no longer killed effectively by antibiotics (medicine that fights infections) arecalled "antibiotic resistant." Which of the following is NOT true about bacteria that are antibioticresistant?a. These bacteria...
- Q Different people's cell phones are home to different types of microbes. Why might this be?a. The types of microbes living on cell phones changes randomly.b. The cell phone owners did...
- Q Why are parasite considered a microorganism?They are small.They produce tissue and organsThey have microscopic larval stagesThey are infectious agentsEukaryotes can be microbes, not just prokaryotes.
- Q Some bacteria are metabolically active in hot springs because they are able to maintain a lower internal temperature. their enzymes have high optimal temperatures. high temperatures make catalysis unnecessary. their...
- Q What makes NIOSH unique among federal research institutions?a)It works with the Department of Labor and other government agencies to promote occupational safety and health.b)It is a part of the Centers...
- Q Which of the following statements about E. coli is true?Some infections can be fatal to humans.It occurs naturally in food crops.Most people can ingest it without harm.It dies quickly outside...
- Q Why during commercial fermentation does special care need to be taken to keep the vats sealed during the process?To keep any bacteria from consuming the yeastIf oxygen is allowed to...
- Q What is a biofilm and how does it help microbes?Challenge Questions1. In this lecture, there were 2 examples of coordinated bacterial activity. What were they?2. How does the toxin/antitoxin system...
- Q Date of Visit: 12/24/YYYYPatient Name: unknownDate of Birth: 1/31/1975Gender:MPatient Type: InpatientReason for Visit:PsoriasisNotes/Comments: Unit 5 Case Study 3PREPROCEDURE DIAGNOSIS: Acute respiratory failure due to Hanta VirusPOSTPROCEDURE DIAGNOSIS: acute respiratory failure...
- Q Mannitol salt agar (MSA) medium is used to select Gram-positive from Gram-negative bacteria.
- Q According to the U.S. Pharmacopeia, what is a Controlled Room Temperature?Any temperature between 46 and 59? FAny temperature between 86 and 104 FA temperature prevailing in a working areaA temperature...
- Q What is the evidence of motility that is visible in SIM medium in the presence of a bacterium with flagella?A Diffuse zone of growth flaring from the line of inoculationB)...
- Q Which of the following is true of a bacterial species that produces dark pink colonies when grown on MacConkey agar?A They are glucose fermentersB They are lactose fermentersC They produce...
- Q Enzymes are all around us and absolutely necessary for life. Take a picture of a food, cosmetic, etc. label and circle all the enzymes that you can identify by suffix...
- Q The small intestine bacteria, while inhabiting areas optimal for growth, have a doubling time of roughly h (h= a your assigned number) hours. A normal small intestine starting population would...
- Q You should know the details of all these experimentsGriffith's experimentAvery McCleod and McCarthyHershey and ChaseMesselsson and Stahl
- Q Bacteria X has an ID50 of 10 and can cause disease in individuals who are otherwise healthy.Bacteria Y has an ID50 of 10,000 and only causes disease in individuals who...
- Q A virus consists of nucleic acid (DNA or RNA) encased in a protein shell separating its nucleic acid from the rest of the environment. Some viruses carry a couple of...
- Q Select the microorganism that is least resistant to chemical and physical control measures.Protozoan cystsEnveloped virusesGram-negative bacteriaNonenveloped (naked) virusesGram-positive bacteria
- Q Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube?Ultraviolet (germicidal) lightGamma rays121C at 15 psi for 15 minutes160C for 2 hoursAll of...
- Q The advantage of using ethylene oxide as a sterilant over moist heat sterilization in an autoclave is thatit kills endospores, whereas the autoclave will only kill vegetative cellsit is much...
- Q Ampicillin, amoxicillin, mezlocillin, and penicillin G all ...target the cell wallhave resistance to the action of penicillinaseare semisynthetichave an expanded spectrum of activityAll of the choices are correct.
- Q In general, animal viruses can enter the host cell by:A) injecting their DNA or RNA into the host cellB) endocytosisC) fusionD) B and C are both possibleE)none of the above
- Q Penicillinases are enzymes produced by bacterial cells, usually after acquiring a newgene, that _______.hydrolyze the B-lactam ring of penicillins and cephalosporins, rendering themineffectivepump the penicillins out of the cell as...
- Q The cellular basis for bacterial resistance to antimicrobials include...bacterial chromosomal mutationssynthesis of enzymes that alter drug structureprevention of drug entry into the cellalteration of drug receptors on cell targetsAll of...
- Q The process of using a cleansing technique to mechanically remove and reducemicroorganisms and debris to safe levels isdisinfectionsterilizationantisepsissanitizationdegermation
- Q Choose the term that describes a bacteriophage infection in which thebacteriophage DNA is inserted into the host cell DNA as a prophage, and theinfected bacteria can continue to grow and...
- Q The Mechanism of Phagocytosis Chemotaxis: Chemical signals attract phagocytes to microorganismsAdherence: Attachment of a phagocyte to the surface of the microorganismIngestion (Opsonization): microorganism is coated with serum proteins (Complement proteins...
- Q A bacterial colony...is visible only using a microscopecan consist of a mix of 2 or more types of bacteriaconsist of millions of genetically identical cells, all derived from an original...
- Q 2. Microbes are important in our lives because...O A. they are used to produced food such as cheese, yogurt, bread, etc.OB. they produce important chemical products such as ethanol, acetone,...
- Q Which one of the following is the appropriate vector of choice for gene therapy?bacteriaprotozoavirusesfungihelminthes
- Q Staphylococcus aureus is a non-endospore former used to examine the germicidal effects for UV lightTrueFalse
- Q The Kirby-Bauer test identifies agents that can be used to fight specific bacteria.TrueFalse
- Q The process of determining proteins expressed in a cell isa. reverse geneticsb. metagenomicsc. proteomicsd. bioinformaticse. forensic microbiology
- Q An alternative to antibiotic resistance is the gene which confers bioluminescence A PGLO B R C ampR DS
- Q Modeling Population Size You have learned about how to sample a population and estimate size from density In this activity you will construct a model of a population sample the...
- Q A transformed bacterium with the ampR gene can easily be tested with an confirming transformation success A antibiotic B a radioisotope C ampR plasmid D tagged phago
- Q Conjugation is a method of bacterial A mitosis B transduction C asexual reproduction D genetic recombination
- Q A Bacteria reproduce which differs from viruses that have a B C Jog
- Q The promoter will be located the DNA that will be read A downstream from B upstream from C 2 base pairs away from D in an organelle away from
- Q What is the purpose of a bacterial promoter in a plasmid O This allows the plasmid to replicate when the bacteria cell divides O This is used to make a...
- Q Which of the following is FALSE regarding generics O O Generics have the same active ingredients as the brand name Generic names may be the chemical name or a term...
- Q What is the function purpose of the guide RNA in the CRISPR Cas9 system
- Q When the Lords of Trade established the Dominion of New England their purpose was to O grant greater local autonomy to the colonists centralize the authority of the Crown O...
- Q Changes brought about by the agricultural revolution included O the possibility of a food surplus the possibility of settlement in one place O technological development O all of the above...
- Q 18 This chemical is an oxidizing agent A Benzalkonium B Ozone C Penicillin D Triclosan E Vesphene 19 This technique will completely sterilize a liquid by killing or removing all...
- Q Constituent C Is abortion a controlled medical procedure or a right to have terminate a family Where does your Representative you work for stand on the issue You choose the...
- Q 36 APC adenomatous polyposis coli gene is an example of a a Proto oncogene b Oncogene c Tumor Suppressor Gene d all of the above
- Q 12 RAS is commonly associated with many cancer s based on a identified loss of function mutations b identified hyperactive mutations c effects on p53 d none of the above
- Q SE 6 SE 5 York College CUNY NAME Bio 301Sp2021B Final Exam 8 May 24 27 Multiple Choice 1 pt each 9 Short Answer 2 pt each 36 Q total...
- Q 26 binds to lac operator preventing transcription A Ubiquitin B Glucose C Allolactose D Cyclic GMP E Repressor 27 Histone acetylation and DNA methylation contribute to A genetic mutation B...
- Q A the enzyme that cuts DNA into fragments B the sticky ends of an RNA fragment C antibiotic resistant colony D a plasmid used to carry insert lipid into a...
- Q 1 The best description of lysogeny by temperate bacteriophage is A mobile segments of DNA B tiny RNA molecules that infect plants C viral DNA integrates into the host genome...
- Q When a horse and donkey mate they produce a mule which is infertile This is an example of which of the following A postzygotic barrier B prezygotic barrier C gametic...
- Q Which sentence best describes how a species might become extinct A Environmental changes favor certain traits over others and those traits become more frequent B Two populations become isolated from...
- Q 2 Five Neurospora auxotrophic mutant strains were isolated None of the mutant strains grew on minimal medium but their ability to grow on minimal medium with the following compounds was...
- Q b With some strains of yeast fermentation stops before sugar is exhausted usually at an alcohol concentration in excess of 12 What is a plausible explanation Explain
- Q Sender 1 A C Receiver I B 0 Communication The plus and minus signs in the diagram denote a Signal strength and weakness b Successful and unsuccessful message transfer C...
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