Question 1

Which of the following is considered a microbe but NOT a microorganism?

Accepted Answer

SARS-CoV-2 (Covid-19 virus)

Question 2

Which statement best describes why viruses are classified as microbes but not as microorganisms?

Accepted Answer

Viruses are not considered living organisms and lack cellular structure.

Question 3

Which of the following is NOT a characteristic of microorganisms?

Accepted Answer

They can be seen with the naked eye.

Question 4

Robert Hooke is credited with which of the following scientific achievements?

Accepted Answer

First visualizing and depicting a microorganism using a microscope.

Question 5

Antonie van Leeuwenhoek used his microscope to observe 'animalcules.' Which of the following did he NOT observe?

Accepted Answer

Viruses

Question 6

Which branch of biology is primarily concerned with the naming and classifying of organisms?

Accepted Answer

Taxonomy

Question 7

According to the three-domain system, which of the following domains contains organisms with a nucleus?

Accepted Answer

Eukarya

Question 8

Which of the following kingdoms is NOT part of the Eukaryotic Domain?

Accepted Answer

Kingdom Eubacteria

Question 9

The proposal that one type of organism can change into another type over a long period of time is known as:

Accepted Answer

Evolution

Question 10

Which of the following best describes the difference between autotrophs and heterotrophs?

Accepted Answer

Autotrophs produce their own food; heterotrophs obtain energy by consuming other organisms.

Question 11

Which of the following is the correct order of taxonomic categories from most inclusive to least inclusive?

Accepted Answer

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 12

A scientist discovers a new organism that is unicellular, lacks a nucleus, and can survive in extreme environments. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 13

Which of the following statements about the three domains of life is correct?

Accepted Answer

Both Bacteria and Archaea are prokaryotic, while Eukarya are eukaryotic.

Question 14

Which of the following best explains why most energy utilized by life originates from the sun?

Accepted Answer

Autotrophs use sunlight to produce organic molecules, which are then consumed by heterotrophs.

Question 15

Which of the following is true regarding the genetic material of microorganisms?

Accepted Answer

Microorganisms can have either DNA or RNA as their genetic material.

Question 16

A student is examining a sample under a light microscope and observes small, round cells that reproduce by budding. Which type of microorganism is the student most likely observing?

Accepted Answer

Yeast cells

Question 17

Which of the following statements about the classification of life is correct?

Accepted Answer

The domain is the most inclusive taxonomic category.

Question 18

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They acquire energy from wastes and dead organisms, recycling nutrients.

Question 19

If a new organism is discovered that is multicellular, has a nucleus, and performs photosynthesis, to which kingdom does it most likely belong?

Accepted Answer

Plantae

Question 20

Which of the following is a correct statement about the evolutionary relationships among the three domains of life?

Accepted Answer

Archaea and Eukarya share a more recent common ancestor with each other than with Bacteria.

Introduction to Microbiology: Microorganisms, Classification, and Energy Acquisition

Study Guide - Practice Questions

Study Guide - Flashcards