Question 1

Why are most prokaryotic cells small?

Accepted Answer

A)  Nutrient diffusion is most efficient for smaller cells. 
B)  A low surface area- to- volume ratio helps smaller cells divide easier. 
C)  A high surface area- to- volume ratio helps smaller cells divide easier. 
D)  Storage bodies within a cell enable cells to be small so they need less nutrients. 
E)  Intracellular inclusions demand that cell size be small. 
A)  Nutrient diffusion is most efficient for smaller cells. 
B)  A low surface area- to- volume ratio helps smaller cells divide easier. 
C)  A high surface area- to- volume ratio helps smaller cells divide easier. 
D)  Storage bodies within a cell enable cells to be small so they need less nutrients. 
E)  Intracellular inclusions demand that cell size be small.

Question 2

Bacteria that have flagella at both poles of the cell are described as amphitrichous.

Accepted Answer

A) True 
 B)False

Question 3

Bacteria that have periplasmic flagella always have a spirochete shape.

Accepted Answer

A) True 
 B)False

Question 4

Gram- positive bacteria stain purple when the Gram stain is complete.

Accepted Answer

A) True 
 B)False

Question 5

What is the function of a carboxysome?

Accepted Answer

A)  fix carbon 
B)  protect against oxygen radicals 
C)  store energy 
D)  store carbon 
E)  acts as a magnetic compass to guide bacteria 
A)  fix carbon 
B)  protect against oxygen radicals 
C)  store energy 
D)  store carbon 
E)  acts as a magnetic compass to guide bacteria

Question 6

Which of the following arrangements is sometimes referred to as having a beads- on- a- string appearance?

Accepted Answer

A)  palisade 
B)  streptococci 
C)  staphylococci 
D)  streptobacilli 
E)  diplococci 
A)  palisade 
B)  streptococci 
C)  staphylococci 
D)  streptobacilli 
E)  diplococci

Question 7

Bacteria that have flagella distributed all over the cell surface are described as (having)

Accepted Answer

A)  periplasmic flagella. 
B)  monotrichous. 
C)  lophotrichous. 
D)  peritrichous. 
E)  amphitrichous. 
A)  periplasmic flagella. 
B)  monotrichous. 
C)  lophotrichous. 
D)  peritrichous. 
E)  amphitrichous.

Question 8

A bacteria's DNA can be found in the nucleus of the cell.

Accepted Answer

A) True 
 B)False

Question 9

Short, bristle- like structures that extrude from the cell surface are called

Accepted Answer

A)  flagella. 
B)  cilia. 
C)  mating bridges. 
D)  pili. 
E)  fimbriae. 
A)  flagella. 
B)  cilia. 
C)  mating bridges. 
D)  pili. 
E)  fimbriae.

Question 10

In which of the following environments do Gram- negative bacteria have an advantage?

Accepted Answer

A)  dry environment 
B)  wet environment 
C)  abrasive environment 
D)  mechanical crushing 
E)  needing to adhere to a host 
A)  dry environment 
B)  wet environment 
C)  abrasive environment 
D)  mechanical crushing 
E)  needing to adhere to a host

Question 11

Membrane proteins perform all of the following functions except

Accepted Answer

A)  anchors. 
B)  blocks. 
C)  enzymes. 
D)  transporters. 
E)  receptors. 
A)  anchors. 
B)  blocks. 
C)  enzymes. 
D)  transporters. 
E)  receptors.

Question 12

Why are Gram- negative bacteria more resistant than Gram- positive bacteria to damage by certain chemical agents like lysozyme?

Accepted Answer

A)  Gram- negative bacteria lack a cell wall. 
B)  Gram- negative bacteria contain peptidoglycan in their cell wall. 
C)  Gram- negative bacteria have a thicker layer of peptidoglycan in their cell wall. 
D)  Gram- negative bacteria have an outer membrane as part of their cell wall. 
E)  Gram- negative bacteria have porins. 
A)  Gram- negative bacteria lack a cell wall. 
B)  Gram- negative bacteria contain peptidoglycan in their cell wall. 
C)  Gram- negative bacteria have a thicker layer of peptidoglycan in their cell wall. 
D)  Gram- negative bacteria have an outer membrane as part of their cell wall. 
E)  Gram- negative bacteria have porins.

Question 13

Which of the following cell shapes look like a comma?

Accepted Answer

A)  vibrio 
B)  coccobacilli 
C)  spirochetes 
D)  bacilli 
E)  stella 
A)  vibrio 
B)  coccobacilli 
C)  spirochetes 
D)  bacilli 
E)  stella

Question 14

Which of the following does not enable bacterial endospores to be heat resistant?

Accepted Answer

A)  exosporium 
B)  low water content 
C)  spore coat 
D)  high amount of dipicolinic acid 
E)  peptidoglycan 
A)  exosporium 
B)  low water content 
C)  spore coat 
D)  high amount of dipicolinic acid 
E)  peptidoglycan

Question 15

In order to maintain a fluid plasma membrane in cold conditions, bacteria commonly have

Accepted Answer

A)  phospholipids less concentrated. 
B)  phospholipids more concentrated. 
C)  more short unsaturated fatty acids in their phospholipids. 
D)  more cholesterol in their phospholipids. 
E)  more longer saturated fatty acids in their phospholipids. 
A)  phospholipids less concentrated. 
B)  phospholipids more concentrated. 
C)  more short unsaturated fatty acids in their phospholipids. 
D)  more cholesterol in their phospholipids. 
E)  more longer saturated fatty acids in their phospholipids.

Question 16

What about Pseudomonas aeruginosa makes it especially problematic in burn victims and cystic fibrosis patients?

Accepted Answer

Pseudomonas aeruginosa is noto

Question 17

Which of the following structures allow bacteria to transfer genetic information through conjugation?

Accepted Answer

A)  capsule 
B)  slime layer 
C)  pili 
D)  glycocalyx 
E)  fimbriae 
A)  capsule 
B)  slime layer 
C)  pili 
D)  glycocalyx 
E)  fimbriae

Question 18

Cell shape is determined by which of the following?

Accepted Answer

A)  cell wall and cytoskeleton components 
B)  whether or not the species uses a flagellum 
C)  the way cells divide 
D)  whether or not the species is pathogenic 
E)  the way cells move through their media 
A)  cell wall and cytoskeleton components 
B)  whether or not the species uses a flagellum 
C)  the way cells divide 
D)  whether or not the species is pathogenic 
E)  the way cells move through their media

Question 19

Which of the following is not an example of an inclusion body?

Accepted Answer

A)  carboxysomes 
B)  poly- fi- hydroxybutyrate 
C)  magnetosomes 
D)  glycogen 
E)  endosomes 
A)  carboxysomes 
B)  poly- fi- hydroxybutyrate 
C)  magnetosomes 
D)  glycogen 
E)  endosomes

Question 20

Which of the following is false about the bacterial cytoskeleton?

Accepted Answer

A)  The bacterial cytoskeleton acts as scaffolding to organize cell division. 
B)  The bacterial cytoskeleton contains actin and tubulin proteins. 
C)  The bacterial cytoskeleton directs the construction of the rigid cell wall. 
D)  The bacterial cytoskeleton provides an overall general organization to the cytoplasm for a variety of biochemical processes. 
E)  The bacterial cytoskeleton is composed of long protein filaments. 
A)  The bacterial cytoskeleton acts as scaffolding to organize cell division. 
B)  The bacterial cytoskeleton contains actin and tubulin proteins. 
C)  The bacterial cytoskeleton directs the construction of the rigid cell wall. 
D)  The bacterial cytoskeleton provides an overall general organization to the cytoplasm for a variety of biochemical processes. 
E)  The bacterial cytoskeleton is composed of long protein filaments.

Exam 3: Introduction to Prokaryotic Cells

Why are most prokaryotic cells small?

Bacteria that have flagella at both poles of the cell are described as amphitrichous.

Bacteria that have periplasmic flagella always have a spirochete shape.

Gram- positive bacteria stain purple when the Gram stain is complete.

What is the function of a carboxysome?

Which of the following arrangements is sometimes referred to as having a beads- on- a- string appearance?

Bacteria that have flagella distributed all over the cell surface are described as (having)

A bacteria's DNA can be found in the nucleus of the cell.

Short, bristle- like structures that extrude from the cell surface are called

In which of the following environments do Gram- negative bacteria have an advantage?

Membrane proteins perform all of the following functions except

Why are Gram- negative bacteria more resistant than Gram- positive bacteria to damage by certain chemical agents like lysozyme?

Which of the following cell shapes look like a comma?

Which of the following does not enable bacterial endospores to be heat resistant?

In order to maintain a fluid plasma membrane in cold conditions, bacteria commonly have

What about Pseudomonas aeruginosa makes it especially problematic in burn victims and cystic fibrosis patients?

Which of the following structures allow bacteria to transfer genetic information through conjugation?

Cell shape is determined by which of the following?

Which of the following is not an example of an inclusion body?

Which of the following is false about the bacterial cytoskeleton?

Introduction to Microbiology

Biochemistry Basics

Introduction to Eukaryotic Cells

Genetics

Viruses and Prions

Fundamentals of Microbial Growth

Microbial Metabolism

Principles of Infectious Disease and Epidemiology

Host-Microbe Interactions and Pathogenesis

Innate Immunity

Adaptive Immunity

Immune System Disorders

Vaccines and Biotechnology-Based Diagnostics and Therapeutics

Antimicrobial Drugs

Respiratory System Infections

Skin and Eye Infections

Nervous System Infections

Digestive System Infections

Urinary and Reproductive System Infections

Cardiovascular and Lymphatic Infections

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