Open Question
Match the following choices to the culture descriptions in questions 3 through 6:
a. Chlamydia
b. Coccidioides
c. Histoplasma
d. Mycobacterium
e. Mycoplasma
Microscopic examination of a lung biopsy shows spherules.
10. Dynamics of Microbial Growth
Growing a Pure Culture
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
A pure culture of bacteria is made of…
A
Around 1 million viable bacteria cells that are all of the same species.
B
Around 1 million viable bacteria cells that are all descended from a single parent cell.
C
Around 1 million viable bacteria cells that are a mixture of different bacterial species.
D
Both A and B.
E
Both A and C.
F
Both B and C.
Verified step by step guidance1
Understand the definition of a pure culture in microbiology: A pure culture consists of a population of cells that are all genetically identical and originate from a single parent cell.
Analyze option A: 'Around 1 million viable bacteria cells that are all of the same species.' This aligns with the definition of a pure culture, as all cells are of the same species.
Analyze option B: 'Around 1 million viable bacteria cells that are all descended from a single parent cell.' This also fits the definition of a pure culture, as all cells originate from a single parent cell.
Analyze option C: 'Around 1 million viable bacteria cells that are a mixture of different bacterial species.' This does not fit the definition of a pure culture, as it involves multiple species.
Combine the correct options based on the analysis: Since both A and B fit the definition of a pure culture, the correct answer is 'Both A and B.'
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