Question 1

Which of the following best describes the main difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotes have a nucleus, prokaryotes do not.

Question 2

Which of the following is NOT a type of microorganism discussed in Chapter 1?

Accepted Answer

Question 3

Which scientist is credited with the discovery of microorganisms using a microscope?

Accepted Answer

Anton van Leeuwenhoek

Question 4

Which of the following statements about Koch’s postulates is TRUE?

Accepted Answer

They require that the suspected microbe be isolated and grown in pure culture.

Question 5

Which of the following is a function of the proton motive force in bacteria?

Accepted Answer

Movement of flagella

Question 6

Which structure is found in Gram-negative bacteria but not in Gram-positive bacteria?

Accepted Answer

Outer membrane containing lipopolysaccharide (LPS)

Question 7

Which of the following best explains why oxygenic photosynthesis was a major evolutionary event?

Accepted Answer

It produced oxygen as a waste product, which accumulated in the atmosphere.

Question 8

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

Accepted Answer

Energy production

Question 9

Which of the following statements about the endosymbiotic theory is supported by evidence?

Accepted Answer

Mitochondria and chloroplasts have their own DNA, which is similar to bacterial DNA.

Question 10

Which of the following best describes the function of fimbriae in bacteria?

Accepted Answer

Attachment to surfaces

Question 11

Which of the following is a correct pairing of macromolecule and its function?

Accepted Answer

Lipids – form biological membranes

Question 12

Which of the following is a reason why Koch’s postulates may not always be applicable?

Accepted Answer

Some microbes cannot be grown in pure culture.

Question 13

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modification and sorting of proteins

Question 14

Which of the following best describes the process of chemiosmosis?

Accepted Answer

Movement of protons down their concentration gradient to drive ATP synthesis

Question 15

Which of the following is a distinguishing feature of Gram-positive bacteria?

Accepted Answer

Thick peptidoglycan layer

Question 16

Which of the following is a correct description of an autotroph?

Accepted Answer

An organism that uses CO$$_2 as $$its carbon source

Question 17

Which of the following is a function of bacterial capsules?

Accepted Answer

Protection from phagocytosis

Question 18

Which of the following is a reason why oxygen was toxic to early life forms?

Accepted Answer

Oxygen can form reactive oxygen species that damage cellular components.

Question 19

Which of the following best describes the function of ribosomes?

Accepted Answer

Protein synthesis

Question 20

Which of the following is a key feature of the endosymbiotic theory?

Accepted Answer

Mitochondria and chloroplasts originated from engulfed prokaryotic cells.

Microbiology Study Notes: Chapters 1, 2, and 3 Overview

Study Guide - Practice Questions