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PORTAGE MICROBIOLOGY EXAM
#4 QUESTIONS WITH 100%
CORRECT ANSWERS
Question :A researcher is asked to determine which of
two vials contains e coli and which contains salmonella.Knowing both gram-negative while only one of them is capable of fermenting lactose, which type of media would be best suited (multiple choice)
Correct answer:Differential media distinguishes between
two, often related, microbes
Question :Colombia CNA agar is most closely related to
which media (multiple choice)
Correct answer:CNA agar is similar to VAP as it is also
enriched with blood and allows for differentiation based on hemolytic patterns
Question :What are the primary byproduct of the TCA
cycle? (multiple choice, multiple answers)
Correct answer:NADH and FADH2
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Question :In the absence of glucose, which of the
following can be used as alternative energy sources?(multiple choice, multiple answers)
- Lactose
- Nucleic acids
- Carbohydrates
- Lipids
Correct answer:Lactose, Carbohydrates, Lipids
Question :For the catabolism of proteins and lipids, which
of the following enzymes are used? Select all that apply (multiple choice, multiple answers)
- Ligases
- Proteases
- Transferases
- Lipases
Correct answer:Proteases and Lipases
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Question :How many ATP does the tricarboxylic acid
(TCA) cycle produce per pyruvate?
A. 1 ATP
B. 2 ATP
C. 4 ATP
D. 34 ATP
Correct answer:A
Question :This phosphorylation process occurs in the
mitochondria of chemotropic eukaryotes (multiple choice)
- Photophosphorylation
- Substrate-level phosphorylation
- Oxidative phosphorylation
Correct answer:C
Question :A reactive intermediate would be present in
which phosphorylation process? (multiple choice)
- Photophosphorylation
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- Substrate-level phosphorylation
- Oxidative phosphorylation
- Chemiosmosis
Correct answer:Substrate-level phosphorylation
Question :The process of photophospyhorylation
produces which of the following: select all that apply
ATP and NADPH (multiple choice, multiple answers)
Correct answer:ATP and NADPH (multiple choice,
multiple answers)
Question :True or False: Growth media is best suited for distinguishing between two similar species of bacteria
Correct answer:False. Growth media is designed to
simply support (and not restrict) microbial growth
Question :True or False: LB agar is classified as a selective, non-differential media