Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
logo
  • Portage Learning Microbiology Module 4
  • Portage Learning Microbiology Module 4
To add items to your wishlist, you must be logged in
Document preview thumbnail
Preview 2 out of 7 pages
Exam (elaborations)

Portage Microbiology Exam 4 2026 – Complete Questions & Correct Answers | A+ Study Guide

0.0
(0 reviews)
- sold
7 pages
2026/2027 Written for academic year
Institution Portage Learning Microbiology Module 4
Course Portage Learning Microbiology Module 4
Document preview thumbnail
Preview 2 out of 7 pages

Portage Learning Microbiology Exam 4 Questions And Answers /. True or False: Growth media is best suited for distinguishing between two similar species of bacteria. - Answer-False. Growth media is designed to simply support (and not restrict) microbial growth /.A researcher is asked to determine which of two vials contains E coli and which contains Salmonella. Knowing both are Gram-Negative while only one of them is capable of fermenting lactose, which type of media would be best suited: - Answer-. Differential media distinguishes between two, often related, microbes. /.What are the requirements of a fastidious microbe? - Answer-A fastidious microbe is an organism with complex growth requirements such that if absent it will not grow. Enriched medias thus contain these specific and essential nutrients required for the growth of a particular subset of microorganisms. /.True or False: LB agar is classified as a selective, non-differential media - Answer-False. LB agar is the most basic type of agar and like LB media supports the growth of virtually all microbes without restriction /.What is agar used for in microbiology? - Answer-Agar is used to create a solid, smooth surface on which microbes can grow. /.Match the following hemolytic class with its description of activity. A. No hemolytic activity B. Incomplete hemolytic C. Complete hemolytic activity 1. Alpha hemolysis 2. Beta hemolysis 3. Gamma hemolysis - Answer-1 B 2 C 3 A /.Columbia CNA agar is most closely related to which media: A. Trypticase Soy Agar B. MacConkey Agar C. Blood agar D. EMB agar - Answer-C. CNA agar is similar to BAP as it is also enriched with blood and allows for differentiation based on hemolytic patterns. /.A researcher is studying a strain of E. coli currently growing on a MacConkey plate. However, the researcher can't remember if E. coli is Gram-Positive or Gram-Negative. Would a Gram stain be necessary to confirm? Why or why not? - Answer-No. A Gram stain would not be necessary, as only Gram-Negative microbes will grow on MacConkey agar. Thus, E. coli is a Gram-Negative microbe. /.. In an attempt to detect the presence of the pathogenic strain of E. coli O157:H7, a researcher spread a culture onto a MacConkey agar with failed results. What type of agar should they (correctly) try next? Why? - Answer-The microbe should be plated on SMAC (Sorbitol-MacConkey agar) as it is specifically formulated to detect O157:H7. Pathogenic E. coli (O157:H7) cannot ferment sorbitol while non-pathogenic E. coli can ferment both soribitol and lactose. Therefore, colonies that ferment (acidic conditions; non-pathogenic) can be differentiated from non-fermenters (neutral to basic conditions; pathogenic). /.. In Eosin Methylene Blue (EMB) agar, what color indicates the presence of E. coli? - Answer-Metallic Green. /.Which type of agar media is best suited to support the growth of Staphylococcus? A. MacConkey agar B. Blood agar C. Columbia CNA agar D. Mannitol salt agar E. Chocolate agar. - Answer-D /.True or False: Chocolate agar gets its brown color from cocoa to produce an enriched media. - Answer-False. Chocolate (cocoa) is never added to the media. The name is derived simply based on the color that actually comes from the presence of 'cooked' (lysed) red blood cells in the media. /.What is the process of spreading a bacterial culture onto a petri dish? - Answer-Plating /.Describe the primary advantage of using a petri dish over growing a liquid culture? - Answer-The primary advantage is that cells are held into place. When grown in a nutrient broth, bacterial cells can multiply but are free to move around in solution. When grown on agar within a petri dish the fixed in such as way as to form colonies /.True or False: The visualization of colonies on a petri dish represents bacterial cells that have multiplied ~2-3 times. - Answer-False. When an individual colony is visible on agar the bacterial cell has multiplied often a million times over.

Content preview

01234568921 911541636

$
6 3
91

12263


62


!3 " 
#9
"6
$
%&'()*&)+,-.(/)0&*123)4(56,)6.)7(.2).'62(5)8*&)56.269:'6.369:)7(21((9)21*).646-,&)
.;(<6(.)*8)7,<2(&6,)=)>9.1(&)+,-.(?)0&*123)4(56,)6.)5(.6:9(5)2*).64;-@).';;*&2)
A,95)9*2)&(.2&6<2B)46<&*76,-):&*123)
)
>)&(.(,&<3(&)6.),.C(5)2*)5(2(&469()136<3)*8)21*)D6,-.)<*92,69.)()<*-6),95)136<3)
<*92,69.).,-4*9(--,?)E9*169:)7*23):&,4=9(:,26D()136-()*9-@)*9()*8)23(4)6.)
<,;,7-()*8)8(&4(9269:)-,<2*.(F)136<3)2@;()*8)4(56,)1*'-5)7()7(.2).'62(5)A4'-26;-()
<3*6<(B)=)>9.1(&)G688(&(926,-)4(56,)56.269:'6.3(.)7(21((9)21*F)*82(9)&(-,2(5F)
46<&*7(.)
)
>)&(.(,&<3(&)6.),.C(5)2*)5(2(&469()68),).,4;-()<*92,69.)H(6..(&6,)4(969:6265(.?)
E9*169:)H(6..(&6,)4(969:6265(.)6.).-*1):&*169:),95)*23(&)8*&(6:9)46<&*7(.)4,@)
,-.*)7();&(.(92)69)23()<'-2'&(F)136<3)2@;()*8)4(56,)1*'-5)7()7(.2).'62(5I)A4'-26;-()
<3*6<(B)=)>9.1(&)J(-(<26D()4(56,)
)
K3,2),&()23()&(L'6&(4(92.)*8),)8,.2656*'.)46<&*7(I)A.3*&2),9.1(&B)=)>9.1(&)>)
8,.2656*'.)46<&*7()6.),9)*&:,96.4)1623)<*4;-(M):&*123)&(L'6&(4(92.).'<3)23,2)6.)

, 01234575879945 8473370252450745323237704322345709
4573452373 53 85005790212357 04722

3 092300729022773020239357
3
44
73345709370
4283
0923

05720023 747 179 !"#2 504283$
4283 072235
30530297
2 52034877 13204 8

903 9!272#0574$
4283%493533 9!57057
75!

3503 9!272#0574$
4283& 93533 9!57057
75!

'003 9!272#0574$
428343 9!57057
75!

& 9170&(0072 259239!39053587370#9579373$

428319 00

3 0923&9053003527521 849  05 304
3473370
42830923

Document information

Uploaded on
August 21, 2026
Number of pages
7
Written in
2026/2027
Type
Exam (elaborations)
Contains
Questions & answers
Report Copyright Violation
$13.49
Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF
Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
Studix
3.7
(13)
Sold
57
Followers
7
Items
1289
Last sold
1 week ago

Browse related subjects

Subjects

  • portage learning microbiology
  • portage learning microbiology module 4
  • portage microbiology exam 4 2026 complete questi

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Learn more Create citation
Working on your references?

Frequently asked questions