BSC 2011 CH 27 Learning Cata

Answer the question below based on this description: "Bacillus cereus is a Gram-positive aerobic or facultatively anaerobic, motile, spore-forming bacterium that is widely distributed environmentally. While B. cereus is associated mainly with food poisoning, it is being increasingly reported to be a cause of serious and potentially fatal non-gastrointestinal-tract infections in humans" (From Bottone E. 2010. Bacillus cereus, a Volatile Human Pathogen. Clinical Microbiology Reviews, 23 (2) 382-398; DOI: 10.1128/CMR.00073-09).

A

Which of the following is/are an autotroph?

A prokaryote that lives near deep-sea hydrothermal vents and uses energy from hydrogen sulfide (H2S) to create organic molecules using CO2 as the source of carbon, Prochlorococcus marinus, an extremely abundant marine cyanobacterium

Which of the following prokaryotes is most likely the cause of this photosynthetic bloom that is coloring the water of this lake green?

Cyanobacteria

Which of the following describes an organism that obtains energy from sunlight and carbon from CO2?

Photoautotroph

Which of the following statements best describes bacteria?

They are very small and have no membrane-bound organelles.

Which of the following types of genetic exchange is correctly matched?

Uptake of DNA from the environment: transformation

Decomposing bacteria:

break down organic molecules into inorganic components

Which term(s) apply to the following prokaryotes: bacteria that live inside the stomach of cows and consume cellulose in the cow's food and release fatty acids as waste products, which can be digested by the cow.

mutualists, chemoheterotroph

Prokaryotic cells do NOT contain which of the following?

nuclear membrane

SAR11 alphaproteobacteria are marine, planktonic coccus bacteria that use a rhodopsin-based type of light-harvesting (as opposed to the common chlorophyll-based type) to meet their energy needs, but are unable to fix carbon and instead absorb dissolved organic molecules to build their own organic molecules. Which term applies to this species?

photoheterotroph

Which of the following tree is correct?

B

Which of the following processes release carbon dioxide?

Both respiration and decomposition

Answer the question below based on this description: "Bacillus cereus is a Gram-positive aerobic or facultatively anaerobic, motile, spore-forming bacterium that is widely distributed environmentally. While B. cereus is associated mainly with food poisoning, it is being increasingly reported to be a cause of serious and potentially fatal non-gastrointestinal-tract infections in humans" (From Bottone E. 2010. Bacillus cereus, a Volatile Human Pathogen. Clinical Microbiology Reviews, 23 (2) 382-398; DOI: 10.1128/CMR.00073-09).

C

Which of the following is NOT a characteristic of Archaea?

More closely related to bacteria than they are to Eukaryotes

The pink/purple area on this sandy beach is caused by purple bacteria that live just below the surface of the sediment since they can't tolerate oxygen. These bacteria are...

Obligate anaerobes

Which of the following statements is true?

Some Bacteria are extremophiles

Which of the following is a parasite?

Staphylococcus aureus, bacteria that causes skin infections in humans

The Archaea's ether membrane bonds help them:

Stay intact in many extreme environments