Question 1

Which of the following statements best describes the difference between Gram-positive and Gram-negative bacterial cell walls?

Accepted Answer

Gram-positive cell walls contain a thick layer of peptidoglycan and lack an outer membrane.

Question 2

A patient contracts a disease after using a contaminated gym towel. What is the most likely mode of transmission?

Accepted Answer

Indirect contact via fomite

Question 3

Which scientist is credited with developing the postulates that link a specific microbe to a specific disease?

Accepted Answer

Robert Koch

Question 4

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

Accepted Answer

Presence of membrane-bound organelles such as mitochondria

Question 5

A virus infects a cell and integrates its DNA into the host genome, remaining dormant for years. This type of infection is best described as:

Accepted Answer

Latent viral infection

Question 6

Which equation correctly represents the calculation of osmotic pressure ($\Pi$) in a solution?

Accepted Answer

$\Pi = iCRT$

Question 7

Which of the following structures is responsible for bacterial motility?

Accepted Answer

Flagella

Question 8

A child is born with a disease inherited from their parent. What is the mode of transmission?

Accepted Answer

Vertical transmission

Question 9

Which of the following best describes the function of ribosomes in both prokaryotic and eukaryotic cells?

Accepted Answer

Protein synthesis

Question 10

Which of the following is a correct statement about biofilms?

Accepted Answer

Biofilms are communities of microorganisms attached to a surface that can resist antibiotics.

Question 11

Which of the following is a correct sequence for the lytic cycle of a bacteriophage?

Accepted Answer

Attachment, penetration, biosynthesis, maturation, release

Question 12

Which of the following is a distinguishing feature of Archaea compared to Bacteria?

Accepted Answer

Archaea have cell walls that lack peptidoglycan.

Question 13

Which scientist is known for discovering penicillin, the first antibiotic?

Accepted Answer

Alexander Fleming

Question 14

Which of the following is a correct description of a fomite?

Accepted Answer

An inanimate object that can transmit infectious agents

Question 15

Which of the following is NOT a function of the bacterial glycocalyx?

Accepted Answer

Protein synthesis

Question 16

Which of the following is the correct formula for calculating the number of generations ($n$) in a bacterial population given initial cell number ($N_0$) and final cell number ($N$)?

Accepted Answer

$n = \frac{\log N - \log N_0}{\log 2}$

Question 17

Which of the following is a correct statement about prions?

Accepted Answer

Prions are infectious proteins that cause neurodegenerative diseases.

Question 18

Which of the following is a correct example of vehicle transmission?

Accepted Answer

Contaminated food and water

Question 19

Which of the following is a correct statement about the function of the plasma membrane in bacteria?

Accepted Answer

It regulates the movement of substances into and out of the cell.

Question 20

Which of the following is a correct description of the process of phage conversion?

Accepted Answer

A bacteriophage alters the phenotype of a host bacterium by introducing new genetic material.

BIO 1570 Microbiology: Comprehensive Learning Objectives and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards