Question 1

Which of the following statements best describes the human microbiome?

Accepted Answer

It is the group of microbes that live stably on or in the human body and help maintain health.

Question 2

Which of the following is NOT a function of the normal microbiota?

Accepted Answer

Producing oxygen and carbohydrates through photosynthesis.

Question 3

A newborn baby is exposed to microbes during birth and shortly after. Which term best describes the microbes that colonize the baby and remain for a short period before disappearing?

Accepted Answer

Transient microbiota

Question 4

Which of the following environmental factors does NOT directly influence the colonization of microbes on a specific body site?

Accepted Answer

The genetic code of the microbe

Question 5

According to binomial nomenclature, which of the following is the correct way to write the scientific name for humans?

Accepted Answer

$Homo sapiens$

Question 6

Why are scientific names of organisms always italicized or underlined?

Accepted Answer

To indicate that they are in Latin and to distinguish them from common names.

Question 7

Which of the following is a correct abbreviation for the scientific name $Homo sapiens$?

Accepted Answer

$H. sapiens$

Question 8

Which of the following statements about bacteria is FALSE?

Accepted Answer

Bacteria can only obtain nutrients from dead organisms.

Question 9

Which of the following groups includes only eukaryotic organisms?

Accepted Answer

Fungi, protozoa, and algae

Question 10

A scientist discovers a new organism that is multicellular, visible to the naked eye, and has microscopic life stages that can infect humans. To which group does this organism most likely belong?

Accepted Answer

Helminths

Question 11

Which of the following best explains why viruses are not classified as prokaryotes or eukaryotes?

Accepted Answer

They lack cellular structure and do not have a nucleus or organelles.

Question 12

Which of the following is a real-world example of the beneficial role of the human microbiome?

Accepted Answer

E. coli in the gut helps digest food and produces vitamins.

Question 13

Which of the following is NOT a characteristic of prokaryotic cells?

Accepted Answer

They have membrane-bound organelles.

Question 14

Which of the following best describes the difference between normal microbiota and transient microbiota?

Accepted Answer

Normal microbiota are acquired at birth and remain indefinitely, while transient microbiota are present for a short time.

Question 15

Which of the following is an example of binomial nomenclature?

Accepted Answer

Homo sapiens

Question 16

A patient is diagnosed with a disease caused by a pathogenic microbe. Which of the following statements is TRUE regarding pathogenic microbes?

Accepted Answer

They are a minority among all microbes.

Question 17

Which of the following is a correct statement about the scientific naming of organisms?

Accepted Answer

The genus name is always capitalized and the species name is always lower-case.

Question 18

Which of the following scenarios best illustrates the concept of colonization by normal microbiota?

Accepted Answer

A newborn baby develops a stable population of skin bacteria that remain for years.

Question 19

Which of the following is NOT a reason why microbes are important to humans?

Accepted Answer

They are all pathogenic and cause disease.

Question 20

Which of the following best explains why scientific names are used worldwide?

Accepted Answer

To provide a universal system for identifying organisms regardless of language or region.

The Microbial World & You: Foundations of Microbiology

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