Mcb 2610 Exam 1 Questions And Answers Latest Updated 2023

Which of the following genera within the spirochetes includes the causative agent of Lyme disease? A. Borrelia B. Holandina C. Leptospira D. Treponema E. Spirochaeta {Ans: Borrelia}Briefly explain the endosymbiosis theory and the evidence that supports it. {Ans: • Proposes that mitochondria and chloroplasts evolved from bacteria that were engulfed by pre-eukaryotic cells • Over time these endosymbiotic prokaryotic cells lost the ability to survive outside host cell but were maintained as organelles • Mitochondria and chloroplasts possess circular DNA with similarity to modern bacteria.}Which of these series arranges microbes from smallest to largest? a. virus → bacterium → red blood cell → paramecium b. virus → red blood cell → bacterium → paramecium c. bacterium → virus → paramecium → red blood cell d. bacterium → virus → red blood cell → paramecium e. paramecium → red blood cell → bacterium → virus {Ans: Virus → bacterium → red blood cell → paramecium}Term for microbes that grow optimally at very high salt concentrations. a) osmolphiles b) barophiles c) halophiles d) psychrophiles e) thermophiles {Ans: halophiles}What is the main function of the FtsZ protein in the bacterial cell? a) DNA replication b) transcription c) translation d)