Biod 171 Final Exam Study

What is the primary purpose of Columbia CNA agar? {Ans: As it suppresses the growth of Gram-negative bacteria CNA agar is, therefore, used for isolation of Gram-positive microbes.}Can viruses be classified as either prokaryotic or eukaryotic microorganisms? {Ans: No. Viruses are neither prokaryotic nor eukaryotic.}According to the module, which STD might be best identified via dark-field microscopy? {Ans: Syphilis. The causative agent, treponema pallidum, is a thin spirochete, making Gram staining (and visualization) difficult. Treponema is therefore most often best identified via dark-field microscopy.}How are the TCA and ETC related? {Ans: The end products of the Kreb's (TCA) cycle are used to fuel the electron transport chain. In other words, as the Kreb's cycle (TCA) produces an abundance of reduced electron carriers (NADH and FADH2), it fuels the ETC. As the electrons are transferred from NADH/FADH2 to terminal electron acceptors a proton motor force is generated, ATP synthase is activated and up to 34 molecules of ATP can be produced.}Which viral replicative process results in the destruction of the host cell? {Ans: The lytic replication cycle occurs when a bacteriophage replicates within a host until it ruptures, effectively destroying the host bacterial cell. The phrase