Scientists hypothesize that the O157:H7 strain of E. coli is so different from the K-12 strain because of __________.

Portions of the genomes of certain prokaryotic species are very similar to portions of the genomes of distantly related prokaryotes. The process that most likely accounts for this genetic similarity is __________.

Which group of bacteria is unusual in that they lack peptidoglycan in their cell walls?

Prokaryotes found inhabiting the Great Salt Lake would be __________.

Which clade of archaea includes most of the extreme thermophiles?

Which of the following is a difference between bacteria and archaea?

Which of the following correctly describe an exergonic reaction? Select True or False for each statement.T/F The products have lower Gibbs free energy than the reactants.T/F Activation energy is required for the reaction to proceed.T/F The products always have lower entropy than the reactants.T/F The reaction always occurs quickly.

Which of the following statements is not true?a. Archaea and bacteria have different membrane lipids.b. The cell walls of archaea lack peptidoglycan.c. Only bacteria have histones associated with DNA.d. Only some archaea use CO2 to oxidize H2, releasing methane.

How does pH affect enzyme-catalyzed reactions?a. Protons serve as substrates for most reactions.b. Energy stored in protons is used to drive endergonic reactions.c. Proton concentration increases the kinetic energy of the reactants, enabling them to reach their transition state.d. The concentration of protons affects an enzyme's folded structure and reactivity.