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Chapter 17: Problem 18

Which statement is most likely to be true concerning obligate anaerobes? a. These organisms can use oxygen if it is present in their environment. b. These organisms cannot use oxygen as their final electron acceptor. c. These organisms carry out fermentation for at least \(50 \%\) of their ATP production. d. Most of these organisms are vegetative fungi.

Short Answer

Expert verified
The most likely true statement concerning obligate anaerobes is option (b), these organisms cannot use oxygen as their final electron acceptor.

Step by step solution

01

- Understand Obligate Anaerobes

Start by having a clear understanding of what obligate anaerobes are. These are bacteria that live and grow in environments where there is no oxygen. In fact, oxygen can be harmful to them.
02

- Evaluate Each Statement

Next, look at each statement and determine whether it is true for obligate anaerobes. (a) is incorrect because they can't use oxygen if it's present. (b) is correct because they can't use oxygen as their final electron acceptor. (c) is ambiguous as not all obligate anaerobes carry out fermentation for at least \(50 \%\) of their ATP production. Lastly, (d) is not accurate as most obligate anaerobes are not fungi, they are typically bacteria.

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Most popular questions from this chapter

Foods rich in fiber are basically plant materials high in cellulose, a cell wall polysaccharide that we cannot digest. The nutritional benefits provided by such foods result from a. other nutrients present that can be digested and absorbed. b. macromolecules (like cellulose) that are absorbed without digestion and then catabolized inside the cells. c. microbes that are the normal symbionts of plant tissues. d. All of the above.

Name the three principal modes of enzyme organization in metabolic pathways.

Compare and contrast mass spectrometry and NMR in terms of their potential advantages and disadvantages for metabolomic analysis.

For each of the following metabolic pathways, describe where in the cell it occurs and identify the starting material and end product(s): a. Citric acid cycle b. Glycolysis c. Oxidative phosphorylation d. Fatty acid synthesis

(Integrates with Chapters \(1 \text { and } 3 .)\) What are the metabolic roles of ATP, \(\mathrm{NAD}^{+},\) and NADPH?
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