Question 1

Which of the following statements best explains why prokaryotes are considered metabolically diverse organisms?

Accepted Answer

They can fill many functional niches, including nutrient cycling and decomposing dead organisms.

Question 2

What is the primary structural difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have organelles surrounded by membranes, while prokaryotic cells lack these organelles.

Question 3

Which of the following is NOT a function of the prokaryotic cell wall?

Accepted Answer

Serving as the site of protein synthesis.

Question 4

Gram-positive bacteria are characterized by which of the following cell wall features?

Accepted Answer

A thick layer of peptidoglycan.

Question 5

Which process allows prokaryotes to exchange genetic material using a pilus?

Accepted Answer

Conjugation

Question 6

Why are extremophiles important in the study of prokaryotic diversity?

Accepted Answer

They provide insight into the possibility of life in extreme conditions, including other planets.

Question 7

Which of the following best describes a biofilm?

Accepted Answer

A community of prokaryotes held together by a gummy-textured matrix, often attached to surfaces.

Question 8

What is the main reason for the development of antibiotic-resistant bacteria?

Accepted Answer

The overuse and incorrect use of antibiotics, including not completing a full course.

Question 9

Which of the following is a correct statement about the evolutionary history of prokaryotes?

Accepted Answer

Prokaryotes were the first forms of life on Earth and existed for billions of years before plants and animals.

Question 10

Which of the following mechanisms does NOT contribute to genetic variation in prokaryotes?

Accepted Answer

Binary fission

Question 11

What is the role of cyanobacteria in the history of Earth's atmosphere?

Accepted Answer

They began the oxygenation of the atmosphere by using carbon dioxide as a source of carbon.

Question 12

Which of the following best describes the structure of a typical prokaryotic chromosome?

Accepted Answer

A single, circular DNA molecule located in the nucleoid region.

Question 13

Which of the following is a major difference between the cell membranes of Bacteria and Archaea?

Accepted Answer

Archaea have cell membranes chemically different from those of Bacteria, often with unique lipid components.

Question 14

Which of the following equations correctly represents binary fission in prokaryotes?

Accepted Answer

$$	ext{Parent Cell} ightarrow 2 	imes 	ext{Daughter Cells}$$

Question 15

Which of the following is a correct statement about Gram staining?

Accepted Answer

Gram-positive bacteria have a thick peptidoglycan layer and retain the violet stain.

Question 16

Which of the following best explains the importance of stromatolites in the study of early life?

Accepted Answer

They are fossilized microbial mats that represent the earliest record of life on Earth.

Question 17

Which of the following is a correct description of chemotrophs?

Accepted Answer

They obtain their energy from chemical compounds, such as sugars and lactose.

Question 18

Which of the following is a reason why biofilms are difficult to destroy?

Accepted Answer

They are resistant to many common forms of sterilization.

Question 19

Which of the following is a correct statement about the role of antibiotics in bacterial resistance?

Accepted Answer

The incorrect use of antibiotics results in the natural selection of resistant forms of bacteria.

Chapter 13.1: Prokaryotic Diversity – Structure, Evolution, and Impact

Study Guide - Practice Questions