What describes best the lifestyle of a bacterium in relation to oxygen? Group of answer choices hydrophilic aerophilic lithotrophic phototrophic
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- Hydrophilic: Describes organisms that are attracted to water. - Aerophilic: Describes organisms that require oxygen for their metabolism. - Lithotrophic: Describes organisms that obtain energy from inorganic substances. - Phototrophic: Describes organisms that Show more…
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Q1: You have isolated a new crenarchaeotal strain from a hydrothermal vent 2000 meters below the surface of the ocean. This isolated strain can survive autoclaving and has an optimal growth temperature of 100°C (212°F) as long as it is grown in a pressurized chamber. It uses H2S as its electron donor and Fe(III) as its electron acceptor and does not need any source of organic carbon in order to grow. Which of the following best describes this organism? Group of answer choices chemolithoautotroph, hyperthermophile, barophile chemoheterotroph, thermophile, neutrophile photoautotroph, hyperthermophile, barophile chemolithoautotroph, thermophile, barophile chemoheterotroph, hyperthermophile, neutrophile Q2: Pasteur showed that wine can be spoiled by ________ bacteria that ferment the sugars in grape juice to __________ . Group of answer choices aerobic / ethanol aerobic / lactic acid anaerobic / ethanol anaerobic / lactic acid Q3: In many aquatic sediments that are regularly exposed to sunlight, layers of different types of photosynthetic bacteria grow and come together as a multi-layered microbial mat. The top layer of these mats is usually composed of cyanobacteria that show phototaxis towards _______ light. Underneath the top layer there are often red or purple layers of bacteria that contain organisms such as Rhodospirillum that show phototaxis towards _______ light. Group of answer choices visible / visible infrared / infrared infrared / visible visible / infrared Q4: In many aquatic sediments that are regularly exposed to sunlight, layers of different types of photosynthetic bacteria grow and come together as a multi-layered microbial mat. The top layer of these mats is usually composed of cyanobacteria that show phototaxis towards _______ light. Underneath the top layer there are often red or purple layers of bacteria that contain organisms such as Rhodospirillum that show phototaxis towards _______ light. Group of answer choices visible / visible infrared / infrared infrared / visible visible / infrared
Shyam P.
Phototroph Chemoorganotroph Chemolithotroph Answer Bank An obligate intracellular parasite that obtains energy from its host Bacteria that synthesize organic compounds from water and sunlight Swamp archaea that oxidize hydrogen Proteobacteria that contain bacteriochlorophylls An extreme thermophile that metabolizes sulfur Symbiotic nitrogen-fixing bacteria that live in root nodules
Adi S.
What terms would describe a prokaryote that lives in boiling hot springs, harnesses energy from the heat, and does not need oxygen to survive? Aerobic Anaerobic Autotroph Heterotroph Extremophile Gram-positive Gram-negative
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