Question Detail

MIC 121 Introductory Microbiology Objective Question
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Question

What happened when Louis Pasteur broke the neck of one of his swan neck flasks after it had remained sterile?
Options
A The broth remained sterile due to the previous boiling.
B The broth immediately spoiled and became contaminated with microorganisms.
Correct Answer
C The broth fermented into alcohol.
D The broth solidified due to exposure to air.
Correct Answer

Option B is the correct answer.

Detailed Explanation

When Pasteur broke the neck of a swan neck flask, it allowed airborne bacteria and dust, previously trapped in the bend, to directly enter the broth. This led to rapid microbial growth and contamination, providing compelling evidence against spontaneous generation.

Hint

Consider what the intact swan neck was designed to prevent from reaching the broth.

Question Info

Course: MIC 121
Topic: Introductory Microbiology
Type: Objective
Difficulty: Not specified
Question 171 of 984
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