Question 1:

Which of the following is the highest taxonomic rank in the classification of microorganisms?

Explanation: The highest taxonomic rank in the classification of microorganisms is Domain. The three domains are Archaea, Bacteria, and Eukarya. Therefore, option D is correct.

Question 2:

Which of the following microorganisms is classified as a eukaryote?

Explanation: Saccharomyces cerevisiae is classified as a eukaryote. It is a type of yeast and belongs to the domain Eukarya. Therefore, option B is correct.

Question 3:

Which of the following microorganisms is classified as a prokaryote?

Explanation: Cyanobacteria is classified as a prokaryote. They are photosynthetic bacteria and belong to the domain Bacteria. Therefore, option C is correct.

Question 4:

Which of the following is a characteristic of Archaea?

Explanation: Archaea have a lack of a true nucleus. They are a distinct domain of microorganisms and are known for their ability to thrive in extreme environments. Therefore, option B is correct.

Question 5:

Which of the following is a common method used for microbial classification?

Explanation: Morphology, which refers to the physical characteristics of microorganisms such as shape and size, is a common method used for microbial classification. Other methods include genetic analysis, metabolism, and ecological factors. Therefore, option A is correct.