Exam 10: Classification of Microorganisms

Which of the following statements is a reason for NOT classifying viruses in one of the three domains of life (Bacteria, Archaea, Eukarya) rather than in a fourth separate domain?

A biochemical test, in the microbiology world, is used to determine

Chloroplasts possess circular DNA and reproduce by binary fission.

The arrangement of organisms into taxa

Which of the following characteristics indicates that two organisms are closely related?

All of the following statements are reasons why fluorescent in situ hybridization (FISH) has become a valuable tool for environmental microbiologists EXCEPT

The phylogenetic classification of bacteria is based on

The highest level in the current taxonomic hierarchy is ʺKingdom.ʺ

Which of the following is the best evidence for a three-domain system?

Table 10.2 I. Gram-positive A. Catalase $+$ 1. Acid from glucose........... Staphylococcus 2. Glucose.........................Micrococcus B. Catalase- 1. Coccus.........................Streptococcus 2. Rod ..........................Lactobacillus II. Gram-negative A. Oxidase- 1. Acid from lactose a. Uses citric acid..........................Citrobacter b. Citric acid.................................Escherichia 2. Lactose- a. $\mathrm { H } _ { 2 } \mathrm {~S}$ produced (1) Urease positive............................Proteus (2) Urease negative.............................. Salmonella B. Oxidase $+$ 1. Rod...........................Pseudomonas 2. Coccus....................... Neisseria -Use the dichotomous key in Table 10.2 to identify a gram -negative coccus.

Phage typing is based on the fact that

Serological testing is used for screening bacterial isolates for similarities.

Serological testing is based on the fact that

Figure 10.2 A nucleic acid hybridization experiment produced the following results. In Figure 10.2, which figure shows the most closely related organisms?

Into which group would you place a photosynthetic cell that lacks a nucleus?

A clone is

Nucleic acid hybridization is based on the fact that

Which of the following best defines a strain in microbiological terms?

Into which group would you place a unicellular organism that has 70S ribosomes and a peptidoglycan cell wall?

If two organisms have similar rRNA sequences, you can conclude that they