Which of the following statements CORRECTLY describes the obligate anaerobic bacteria?
Correct answer: A. They are killed by free oxygen
- A. They are killed by free oxygen
- B. They essentially need free oxygen
- C. They can live with or without free oxygen
- D. They obtain free oxygen from the host's body
Explanation
Obligate anaerobic bacteria are organisms that cannot survive in the presence of oxygen. Oxygen is toxic to them, and they only thrive in environments devoid of it. This distinguishes them from aerobic bacteria, which require oxygen, and facultative anaerobes, which can survive with or without oxygen. Understanding these distinctions helps clarify that the correct statement about obligate anaerobes is that they are killed by free oxygen, as described in Option A. Options B, C, and D incorrectly describe characteristics of other types of bacteria or misrepresent the nature of obligate anaerobes.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Kingdom Prokaryotae
Kingdom Prokaryotae includes bacteria and cyanobacteria, organisms with no membrane-bound nucleus or membrane-bound organelles. It covers their cell wall, capsule, flagella, plasmids, forms of nutrition, binary fission, useful and harmful roles, and the differences between prokaryotic cells and eukaryotic cells.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kingdom Prokaryotae questions
Escherichia coli is a facultative anaerobic bacterium because it can
The type of locomotion shown by bacteria towards carbon and energy sources is
The maximum growth rate occurs in the:
A microbiologist used Gram staining method in a laboratory to identify different types of infectious bacteria in four different samples (I, II, III and IV). The given table shows the results.Based on given results, gram positive bacteria are found in samples:
A microbiologist used Gram staining method in a laboratory to identify different types of infectious bacteria in four different samples (I, II, III and IV). The given table shows the results.Based on the results of sample I and IV, he infers that the cell walls of Escherichia coli and Salmonella typhi have
The given diagram shows a phenomenon in bacteria.