PART 7: Eukaryote / Prokaryote Lesson

Which of the following is a common misconception about bacteria?

• Bacteria are only found in contaminated or dirty environments.

• Bacteria are always beneficial to organisms and ecosystems.

• Bacteria are complex eukaryotic organisms.

• Bacteria can only reproduce sexually.

What is a beneficial role that some bacteria play in ecosystems or for other organisms?

• Causing diseases like strep throat and tetanus.

• Breaking down food and producing vitamins in digestive systems.

• Destroying viruses in the human body.

• Forming endospores to survive extreme heat.

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Which characteristic is true for bacteria?

• They are eukaryotic cells with a nucleus.

• Their DNA is arranged in a linear shape within a nucleus.

• They possess membrane-bound organelles like mitochondria.

• They are prokaryotic cells and lack a nucleus.

How can bacteria share genetic material, such as plasmids, with each other?

• Through binary fission, creating genetically diverse offspring.

• By forming endospores to transfer DNA to new environments.

• Via conjugation, using pili to exchange plasmids.

• By undergoing mitosis and cytokinesis.

What is the primary method bacteria use to reproduce, and what type of cell division does this represent?

• Mitosis, a form of sexual reproduction.

• Binary fission, a form of asexual reproduction.

• Budding, a form of sexual reproduction.

• Conjugation, a form of asexual reproduction.

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In the section "Ecological Powerhouses," the author describes bacteria as "indispensable." Which phrase best explains the author's meaning of this word in this context?

• Easily swapped out for other, more efficient organisms

• Able to move quickly through the ecosystem.

• Necessary for the completion of nutrient cycles and ecosystem function.

• Too small to be seen without a powerful microscope.

Which statement from the text provides the best evidence for the claim that bacteria have a significant positive impact on global food production?

• Environmental engineers study the effects of bacteria on soil health.

• Nitrogen-fixing bacteria convert nitrogen gas into forms that plants can use to grow.

• Pathogenic bacteria cause diseases like strep throat.

• Specific bacteria are programmed to create human insulin for people with diabetes.

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What is the main purpose of the "Replication: How Bacteria Multiply" subsection in relation to the entire article?

• To analyze the genetic differences between various bacterial species.

• To provide a comparative analysis of prokaryotic and eukaryotic cell structures.

• To explain why all bacterial diseases spread so slowly through human populations.

• To demonstrate a key mechanism (binary fission) that explains the bacteria's abundance and ecological success.

Based on the text, why might a microbiologist be interested in the process of binary fission when studying an infectious disease?

• Because binary fission requires the use of antibiotics to complete.

• Because understanding how quickly a bacterium reproduces can help predict how fast a disease will spread.

• Because only pathogenic bacteria use binary fission for reproduction.

• Because binary fission is the mechanism by which bacteria "eat" pollutants.

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An environmental engineer is using bacteria for a bioremediation project to clean up an oil spill. This type of career combines knowledge from which two core roles of bacteria described in the reading?

• Their role as pathogenic organisms and their ability to produce insulin.

• Their status as prokaryotes and their method of asexual reproduction.

• Their structure as single-celled organisms and their ability to form symbiotic relationships

• Their function as decomposers (breaking down matter) and their capability for rapid replication.

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