Download Portage Learning : BIOD 171 Essential Microbiology w/ Lab | BIOD 171 L4: Lab Exam 4. and more Exams Nutrition in PDF only on Docsity!
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L4: Lab Exam 4- Requires Respondus LockDown Browser j
Due No due date Points 30 Questions 12 Time Limit 60 Minutes^ Requires^ Respondus^ LockDown^ Browser
Instructions *Note: Lab Notebooks are allowed to be used during the Lab Exam. They must be handwritten or printed off to be utilized due to Lockdown Browser not b allowing tabs and files to be open during an exam.
- Attempt History | i Attempt Time Score LATEST -~ ° Attempt 1 41 minutes 30 out of 30 Score for this quiz: 30 out of 30
Submitted May 4 at 7:40pm
This attempt took 41 minutes. Question 1 X^ 3/3pts
What type of media is best used to eliminate certain bacteria from within a mixed culture?
Your Answer: : A Selective Media Scanned with
Miita e = { Selective media Question 2 | ‘ o 4/4pts If you were to remove the red bloods cells from at blood agar plate (BAP), what kind of agar plate derivative would you _have? Your Answer: A Derivative of : Triple Soy Agar Yeast Extract (TSAYE).
TSAYE (Tryptic soy agar yeast extract)
Question 3 i l it ' ~ 3/3pts & What was the name of the selective agaf plate (shown below) that is similar to a blood agar plate? Scanned with
Question 4 '^ -^ 2/^ 2pts What type of bacteria does MacConkey agar select for? Your Answer: s
Gram Negative Bacteria
Gram-negative bacteria.
Question^ 5'^ :^ ;^ :^ >^ 2/2pts
Sorbitol MacConkey (SMAC) agar is:
Selective media ) N Selective media. Differential media m © Selective and differential media n ‘ g l None of the above ’ | Scanned with
Question 6 ‘^ 2/^ 2pts
What pathogen is best identified using a SMAC agar?
Your Answer:
Ecoli K12 (Standard pathogen)
Ecoli 0157 (Potent pathogen)
-~ E coli 0157:H7. SMAC agar specifically differentiates between non-pathogenic E coli and the pathogenic E coli strain | 0157:H7. \ | Question 7! 2/2pts What plating method is used to isolate a single bacteria colony? Your Answer: The LB Agar Plating with the 4phase dillution streaking
. 4-phase dilution streak.
Scanned with
. Individual colonies were observed within Phase 3. Your Answer: The LB Agar Plate: with the Four Phase Dillution Streaking 4-phase dilution streak 25/2.5pts . e ————————_ Scanned with
Question^11 _^ 2.5/^ 2.5^ pts
| | Identify the organism growing on the BOTTOM half of the agér, and describe the observed hemolytic properties. Your Answer: Blood Agar : Bottom half is Staph Aureus : Exibits 'Beta Hemolysis". The White part filled Agar (white part has changed color), because of the lysis of RBC. That is why when tilted, the Red Algar is clear. N
E. coli; Non-hemolytic activity (gamma) is observed as E coli does not lyse red blood cells. i
Question 12 2.5/^ 25pts
Scanned with
