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Bio 255 Exam 1 complete solutions
,latest 2026 update ,verified answers
Question 1
Which of the following microbes is correctly matched with its disease?
Multiple Choice:
A. Escherichia – Anthrax
B. Bacillus – Anthrax
C. Treponema – Tuberculosis
D. Staphylococcus – Gonorrhoeae
Correct Answer:
B. Bacillus – Anthrax
Rationale:
Bacillus anthracis causes anthrax. Other microbes:
• E. coli → usually gastrointestinal infections
• Treponema pallidum → syphilis
• Staphylococcus aureus → skin infections and food poisoning
• Neisseria gonorrhoeae → gonorrhea
Question 2
Who is credited with first observing microorganisms in 1674?
Multiple Choice:
A. Louis Pasteur
B. Robert Koch
C. Antonie van Leeuwenhoek
D. Joseph Lister
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Correct Answer:
C. Antonie van Leeuwenhoek
Rationale:
Leeuwenhoek was the first to observe microorganisms under a microscope, laying the foundation for microbiology. Pasteur
and Koch contributed to germ theory and vaccines later, while Lister introduced antiseptic surgery.
Question 3
Who introduced antiseptic surgical techniques in the 1860s?
Multiple Choice:
A. Semmelweis
B. Lister
C. Jenner
D. Koch
Correct Answer:
B. Lister
Rationale:
Joseph Lister (1865) used carbolic acid sprays during surgery to reduce infection. Semmelweis (1847) promoted
handwashing in obstetrics, and Jenner (1796) developed the smallpox vaccine.
Question 4
Which scientist is associated with preventing childbed fever through hand sanitation?
Multiple Choice:
A. Louis Pasteur
B. Robert Koch
C. Semmelweis
D. Leeuwenhoek
Correct Answer:
C. Semmelweis
Rationale:
Semmelweis demonstrated that physician hand hygiene drastically reduced maternal mortality from puerperal fever.
Question 5
Which of the following contributions is correctly attributed to Louis Pasteur?
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Bio 255 Exam 1 complete solutions
,latest 2026 update ,verified answers
Question 1
Which of the following microbes is correctly matched with its disease?
Multiple Choice:
A. Escherichia – Anthrax
B. Bacillus – Anthrax
C. Treponema – Tuberculosis
D. Staphylococcus – Gonorrhoeae
Correct Answer:
B. Bacillus – Anthrax
Rationale:
Bacillus anthracis causes anthrax. Other microbes:
• E. coli → usually gastrointestinal infections
• Treponema pallidum → syphilis
• Staphylococcus aureus → skin infections and food poisoning
• Neisseria gonorrhoeae → gonorrhea
Question 2
Who is credited with first observing microorganisms in 1674?
Multiple Choice:
A. Louis Pasteur
B. Robert Koch
C. Antonie van Leeuwenhoek
D. Joseph Lister
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,https://www.stuvia.com/user/Edufiles
Correct Answer:
C. Antonie van Leeuwenhoek
Rationale:
Leeuwenhoek was the first to observe microorganisms under a microscope, laying the foundation for microbiology. Pasteur
and Koch contributed to germ theory and vaccines later, while Lister introduced antiseptic surgery.
Question 3
Who introduced antiseptic surgical techniques in the 1860s?
Multiple Choice:
A. Semmelweis
B. Lister
C. Jenner
D. Koch
Correct Answer:
B. Lister
Rationale:
Joseph Lister (1865) used carbolic acid sprays during surgery to reduce infection. Semmelweis (1847) promoted
handwashing in obstetrics, and Jenner (1796) developed the smallpox vaccine.
Question 4
Which scientist is associated with preventing childbed fever through hand sanitation?
Multiple Choice:
A. Louis Pasteur
B. Robert Koch
C. Semmelweis
D. Leeuwenhoek
Correct Answer:
C. Semmelweis
Rationale:
Semmelweis demonstrated that physician hand hygiene drastically reduced maternal mortality from puerperal fever.
Question 5
Which of the following contributions is correctly attributed to Louis Pasteur?
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