Question 1

The names of the three proposed domains are: Bacteria,Protista,and Eukarya.

Accepted Answer

The three domains of life are Bacteria, Archaea, and Eukarya. Protista is not a domain but a kingdom within the Eukarya domain.

Question 2

Which of the following is a taxon that contains all the other taxa listed?

Accepted Answer

The kingdom is the highest taxon level, and it contains all other taxa. Species is the lowest taxon level, while family, genus, and phylum fall in between.

Question 3

Select the correct descending taxonomic hierarchy (left to right).

Accepted Answer

Family is higher up in the taxonomic hierarchy than genus, and species is the most specific level. Therefore, the correct order is family, genus, species.

Question 4

Which scientific field is involved in the identification,classification,and naming of organisms?

Accepted Answer

Taxonomy is the scientific field that involves the identification, classification, and naming of organisms. It is concerned with the naming and grouping of various organisms based on their characteristics, including physical, physiological, and evolutionary. Nomenclature involves the naming of organisms, but it is not a scientific field in itself. Epidemiology involves the study of the spread and control of diseases. Phylogeny deals with the evolutionary relationships among organisms. Pathology is the study of diseases in living organisms.

Question 5

Sterile refers to ______.

Accepted Answer

Sterile means completely free of any living organisms, including bacterial spores and viral particles. This is important in healthcare settings to prevent the spread of infection. Homogenized refers to a mixture being uniform in consistency. Pathogen-free means free of disease-causing microorganisms. Pasteurization is a process of heating food or drink to kill harmful bacteria. Absence of spores refers specifically to the absence of reproductive structures of certain bacteria or fungi.

Question 6

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on

Accepted Answer

The sequence of nucleotides in rRNA can reveal information about the evolutionary relatedness of organisms. This is because rRNA is conserved across all living organisms and evolves slowly over time, so the more similar the rRNA sequences are between two organisms, the more closely related they are.

Question 7

Which of the following is a scientific name?

Accepted Answer

Scientific names consist of the genus name (capitalized) and the species name (lowercase). Streptococcus pyogenes is a scientific name because it follows this naming convention. Streptobacilli and Gram-positive streptococcus are not specific enough to be considered scientific names, and Anthrax only refers to a single species of bacteria (Bacillus anthracis) and not a full scientific name.

Question 8

The scientific method includes all of the following except ______.

Accepted Answer

While publication is an important aspect of sharing scientific findings, it is not a required step in the scientific method itself. The other three options - experimentation, hypothesis, and observation - are all fundamental components of the scientific method.

Question 9

The scientific method involves formulating a tentative explanation,called the hypothesis,to account for what has been observed or measured.

Accepted Answer

This is a correct statement about the scientific method. The hypothesis is a proposed explanation that can be tested through further observation and experimentation.

Question 10

A recently-developed mnemonic for remembering the taxonomic levels from Domain to Species is "Dumb Kids Prefer Candy Over Fancy Green Salad." The word "candy" here is a reminder of the taxonomic level of _______.

Accepted Answer

"Candy" represents the taxonomic level of "class".

Question 11

The study of evolutionary relationships among organisms is called ______.

Accepted Answer

Phylogeny refers to the study of the evolutionary relationships among organisms. Genetics is the study of genes and heredity, biotechnology is the application of biological techniques to create new products, processes, or tools, taxonomy is the classification of organisms, and recombinant DNA is a type of DNA that has been artificially created by combining segments from different sources.

Question 12

Caring for patients infected with a new virus requires safety precautions for medical personnel.Choosing appropriate procedures is an example of a(n)______ process.

Accepted Answer

Choosing appropriate procedures is an example of a deductive process where specific observations are used to form general conclusions or hypotheses.

Question 13

A diagram of the three domains (Bacteria,Archaea,Eukarya)proceeding from the Last Universal Common Ancestor would show Archaea

Accepted Answer

The three domains (Bacteria, Archaea, Eukarya) are believed to have evolved from a single organism, the Last Universal Common Ancestor (LUCA). Based on genetic and biochemical evidence, it is thought that Archaea and Eukarya are more closely related to each other than either is to Bacteria. Therefore, a diagram of the three domains proceeding from LUCA would show Archaea branching off the Domain Eukarya, indicating that they share a more recent common ancestor.

Question 14

The orderly arrangement of organisms into a hierarchy of taxa is called ______.

Accepted Answer

The orderly arrangement of organisms into a hierarchy of taxa is known as classification. This process involves grouping organisms based on shared characteristics and arranging them in a defined order, such as kingdom, phylum, class, order, family, genus, and species.

Question 15

Members of the same species share many more characteristics compared to those shared by members of the same kingdom.

Accepted Answer

Members of the same species have a much closer genetic and physical relationship compared to members of the same kingdom, which is a broader category that includes many different species with varying characteristics.

Question 16

Which scientific name is written correctly?

Accepted Answer

The answer of Which scientific name is written correctly?
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Question 17

Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that

Accepted Answer

Analysis of the small subunit rRNAs from all organisms in the three current domains shows strong evidence for a universal common ancestor for all modern and extinct organisms on Earth. The similarities in the rRNA across all three domains suggest a shared ancestry and support the theory of evolution.

Question 18

The smallest and most significant taxon is a ______.

Accepted Answer

Species is the smallest and most significant taxon as it represents a specific type of organism with distinct characteristics and unique features. All other classification levels, including genus, family, phylum, and kingdom, are broader categories that encompass multiple species.

Question 19

Taxonomy does not involve ______.

Accepted Answer

Taxonomy involves classification, nomenclature, and identification of organisms. However, it does not involve the use of common names as these can vary across languages and cultures, and can create confusion in scientific communication. Instead, taxonomy uses scientific names based on a universally accepted system of naming organisms.

Question 20

When assigning a scientific name to an organism,

Accepted Answer

Both the genus and species names are italicized or underlined in scientific names.

Quiz 1: The Main Themes of Microbiology