Which of the following statements is true?(A)Archaea and bacteria have identical membrane lipids.(B)The cell walls of archaea lack peptidoglycan.(C)Prokaryotes have low levels of genetic diversity.(D)No archaea are capable of using CO2 to oxidize H2, releasing methane.

What do some photosynthetic bacteria use as a source of electrons instead of water?a. oxygen (O2)b. hydrogen sulfide (H2S)c. organic compounds (e.g., CH3COO−)d. nitrate (NO3-)

Photoautotrophs usea. light as an energy source and CO2 as a carbon source.b. light as an energy source and methane as a carbon source.c. N2 as an energy source and CO2 as a carbon source. d. CO2 as both an energy source and a carbon source.

What are organisms called that use inorganic compounds as electron donors in cellular respiration?a. phototrophsb. heterotrophsc. organotrophsd. lithotrophs

What does the chemiosmotic hypothesis claim?a. ATP is generated using phosphates taken from intermediates in the electron transport chain.b. ATP is generated using a phosphate gradient produced by glycolysis and the citric acid cycle.c. ATP is generated using a proton-motive force that is produced by the electron transport chain.d. Water is generated using electrons taken from NADH and FADH2 and transported through the electron transport chain.

In terms of nutrition, autotrophs are to heterotrophs asa. kelp are to diatoms.b. archaea are to bacteria.c. slime molds are to algae.d. algae are to slime molds.

Explain how feedback inhibition regulates metabolic pathways.

Which of the following involves metabolic cooperation among prokaryotic cells?a. binary fissionb. endospore formationc. biofilmsd. photoautotrophy

Which of the following describes a bacterium that lives in the human intestine and causes disease?(A)commensalist(B)decomposer(C)gut mutualist(D)symbiotic pathogen