Question 1

Which of the following microorganisms is the smallest in size?

Accepted Answer

Prion

Question 2

According to the Woese-Fox system of taxonomy, which domains include organisms without a true nucleus?

Accepted Answer

Bacteria and Archaea

Question 3

Which process is responsible for the majority of oxygen production on Earth?

Accepted Answer

Photosynthesis by microorganisms

Question 4

A scientist is studying a microorganism that lacks organelles and a true nucleus. Which group does this organism most likely belong to?

Accepted Answer

Bacteria

Question 5

Which of the following is NOT considered a microbe?

Accepted Answer

Mushroom

Question 6

Which of the following statements about the theory of evolution is correct?

Accepted Answer

It is a well-established natural phenomenon supported by scientific evidence.

Question 7

Which of the following is an example of bioremediation?

Accepted Answer

Using microbes to clean up an oil spill

Question 8

Place the following organisms in order from largest to smallest: Helminth, Protozoan, Bacterium, Virus, Prion.

Accepted Answer

Helminth \u003e Protozoan \u003e Bacterium \u003e Virus \u003e Prion

Question 9

Which scientist is credited with disproving spontaneous generation using swan-necked flask experiments?

Accepted Answer

Louis Pasteur

Question 10

What is the main function of phospholipids in cells?

Accepted Answer

Forming the main constituent of cell membranes

Question 11

Which of the following is a characteristic of viruses?

Accepted Answer

They contain hereditary material surrounded by a protein coat.

Question 12

Which macromolecule is primarily responsible for catalyzing chemical reactions in cells?

Accepted Answer

Proteins

Question 13

A protein's tertiary structure is stabilized by which type of bond formed by cysteine?

Accepted Answer

Disulfide bond

Question 14

Which of the following is NOT a component of a nucleotide?

Accepted Answer

Amino acid

Question 15

Which of the following is a correct binomial name for a microorganism?

Accepted Answer

Escherichia coli

Question 16

Which of the following is a function of small RNAs in cells?

Accepted Answer

Regulating gene expression

Question 17

Which of the following is a major difference between bacteria and eukaryotes?

Accepted Answer

Eukaryotes have a true nucleus, bacteria do not.

Question 18

Which of the following is a real-world application of recombinant DNA technology?

Accepted Answer

Transferring genetic material to create genetically modified organisms

Question 19

Which of the following is NOT a domain in the Woese-Fox system of taxonomy?

Accepted Answer

Protista

Question 20

Which molecule provides energy for cellular reactions and is composed of adenine, ribose, and three phosphate groups?

Accepted Answer

ATP

Introduction to Microbiology: Microbes and Their Building Blocks

Study Guide - Practice Questions