Question 1

The Fluid-mosaic model describes the structure of

Accepted Answer

A)  cell walls 
B)  cell membranes 
C)  capsules 
D)  endosymbiotic relationships 
A)  cell walls 
B)  cell membranes 
C)  capsules 
D)  endosymbiotic relationships

Question 2

Which of the following statements about the endosymbiotic hypothesis is false?

Accepted Answer

A)  eukaryotic cells have both 70S and 80S ribosomes 
B)  mitochondria have their own DNA 
C)  when removed from cells, mitochondria continue to grow and divide 
D)  mitochondria are about the same size as prokaryotic cells 
A)  eukaryotic cells have both 70S and 80S ribosomes 
B)  mitochondria have their own DNA 
C)  when removed from cells, mitochondria continue to grow and divide 
D)  mitochondria are about the same size as prokaryotic cells

Question 3

Which bacterial genus normally lacks a cell wall?

Accepted Answer

A)  Mycobacterium 
B)  Streptococcus 
C)  Mycoplasma 
D)  Bacillus 
A)  Mycobacterium 
B)  Streptococcus 
C)  Mycoplasma 
D)  Bacillus

Question 4

When the fluid within a cell has a higher concentration of dissolved substances than the fluid surrounding the cell,we say the fluid surrounding the cell is

Accepted Answer

A)  hypertonic 
B)  isotonic 
C)  osmotonic 
D)  hypotonic 
A)  hypertonic 
B)  isotonic 
C)  osmotonic 
D)  hypotonic

Question 5

Penicillin controls the growth of bacteria by

Accepted Answer

A)  destroying cell membranes 
B)  preventing protein synthesis 
C)  removing cell walls 
D)  preventing peptidoglycan synthesis 
A)  destroying cell membranes 
B)  preventing protein synthesis 
C)  removing cell walls 
D)  preventing peptidoglycan synthesis

Question 6

Bacteria with flagella all over their surface are said to be

Accepted Answer

A)  monotrichous 
B)  peritrichous 
C)  amphitrichous 
D)  lophotrichous 
A)  monotrichous 
B)  peritrichous 
C)  amphitrichous 
D)  lophotrichous

Question 7

Which of the following is responsible for converting sunlight into chemical energy?

Accepted Answer

A)  chromatophores 
B)  chloroplasts 
C)  endoplasmic reticulum 
D)  two of the above 
A)  chromatophores 
B)  chloroplasts 
C)  endoplasmic reticulum 
D)  two of the above

Question 8

A small comma shaped bacteria is described as being a ________.

Accepted Answer

A)  spirochete 
B)  bacillus 
C)  spirillum 
D)  vibrio 
A)  spirochete 
B)  bacillus 
C)  spirillum 
D)  vibrio

Question 9

Endocytosis

Accepted Answer

A)  releases material in the form of phagosomes 
B)  is the process of taking materials into the cell 
C)  directs material to the endoplasmic reticulum 
D)  uses simple diffusion to move material across the plasma membrane 
A)  releases material in the form of phagosomes 
B)  is the process of taking materials into the cell 
C)  directs material to the endoplasmic reticulum 
D)  uses simple diffusion to move material across the plasma membrane

Question 10

Which of the following statements about motility is false?

Accepted Answer

A)  chemotaxis is the movement of bacteria toward or away from a chemical 
B)  pseudopodia are associated with fungi 
C)  bacteria use helical movements to orient to external signals 
D)  pseudopodia are temporary projections of cytoplasm 
A)  chemotaxis is the movement of bacteria toward or away from a chemical 
B)  pseudopodia are associated with fungi 
C)  bacteria use helical movements to orient to external signals 
D)  pseudopodia are temporary projections of cytoplasm

Question 11

Mitochondria

Accepted Answer

A)  are responsible for converting sunlight to chemical energy 
B)  are present only in photosynthetic organisms 
C)  have a double membrane 
D)  are responsible for protein synthesis 
A)  are responsible for converting sunlight to chemical energy 
B)  are present only in photosynthetic organisms 
C)  have a double membrane 
D)  are responsible for protein synthesis

Question 12

Cocci shaped cells which divide along two planes will produce cells arranged into

Accepted Answer

A)  diplococci 
B)  streptococci 
C)  tetrads 
D)  staphylococci 
A)  diplococci 
B)  streptococci 
C)  tetrads 
D)  staphylococci

Question 13

Which of the following structures is not normally part of a bacterial flagellum?

Accepted Answer

A)  hook 
B)  filament 
C)  basal body 
D)  anchor 
A)  hook 
B)  filament 
C)  basal body 
D)  anchor

Question 14

Some bacteria can transfer DNA to another cell using

Accepted Answer

A)  conjugation pili 
B)  fimbriae 
C)  axial filaments 
D)  lophotrichous flagella 
A)  conjugation pili 
B)  fimbriae 
C)  axial filaments 
D)  lophotrichous flagella

Question 15

In bacteria the cell membrane functions in all of the following ways,except:

Accepted Answer

A)  regulates movement of materials into and out of the cell 
B)  synthesizes cell wall components 
C)  serves as the site for protein synthesis 
D)  assists with DNA replication 
A)  regulates movement of materials into and out of the cell 
B)  synthesizes cell wall components 
C)  serves as the site for protein synthesis 
D)  assists with DNA replication

Question 16

Lipids would be found primarily in the cell wall of

Accepted Answer

A)  Gram positive bacteria 
B)  Gram negative bacteria 
C)  Gram variable bacteria 
D)  acid-fast bacteria 
A)  Gram positive bacteria 
B)  Gram negative bacteria 
C)  Gram variable bacteria 
D)  acid-fast bacteria

Question 17

Give examples of microorganisms that are prokaryotes and eukaryotes. What microorganism does not fit in either category? Describe three differences between prokaryotes and eukaryotes.

Accepted Answer

Prokaryotes include bacteria. Eukaryotes

Question 18

Endospores are typically found in the genera

Accepted Answer

A)  Streptococcus 
B)  Clostridium 
C)  Mycobacterium 
D)  Staphylococci 
A)  Streptococcus 
B)  Clostridium 
C)  Mycobacterium 
D)  Staphylococci

Question 19

Which of the following statements is false?

Accepted Answer

A)  all bacteria are capable of forming capsules 
B)  the chemical composition of each capsule is unique to a particular strain of bacteria 
C)  slime layer is usually thinner than a capsule 
D)  a slime layer protects bacteria against drying and helps trap nutrients near a cell. 
A)  all bacteria are capable of forming capsules 
B)  the chemical composition of each capsule is unique to a particular strain of bacteria 
C)  slime layer is usually thinner than a capsule 
D)  a slime layer protects bacteria against drying and helps trap nutrients near a cell.

Question 20

Which is the correct ordering of cell wall components starting from outside the cell and going inward?

Accepted Answer

A)  in gram positive bacteria: peptidoglycan, cell membrane 
B)  in gram negative bacteria: peptidoglycan, lipopolysaccharide, periplasmic space, outer membrane, cell membrane 
C)  in acid fast bacteria: peptidoglycan, lipid layer, cell membrane 
D)  in gram negative bacteria: peptidoglycan, periplasmic space, lipid membrane 
A)  in gram positive bacteria: peptidoglycan, cell membrane 
B)  in gram negative bacteria: peptidoglycan, lipopolysaccharide, periplasmic space, outer membrane, cell membrane 
C)  in acid fast bacteria: peptidoglycan, lipid layer, cell membrane 
D)  in gram negative bacteria: peptidoglycan, periplasmic space, lipid membrane

Exam 4: Characteristics of Prokaryotic and Eukaryotic Cells

The Fluid-mosaic model describes the structure of

Which of the following statements about the endosymbiotic hypothesis is false?

Which bacterial genus normally lacks a cell wall?

When the fluid within a cell has a higher concentration of dissolved substances than the fluid surrounding the cell,we say the fluid surrounding the cell is

Penicillin controls the growth of bacteria by

Bacteria with flagella all over their surface are said to be

Which of the following is responsible for converting sunlight into chemical energy?

A small comma shaped bacteria is described as being a ________.

Endocytosis

Which of the following statements about motility is false?

Mitochondria

Cocci shaped cells which divide along two planes will produce cells arranged into

Which of the following structures is not normally part of a bacterial flagellum?

Some bacteria can transfer DNA to another cell using

In bacteria the cell membrane functions in all of the following ways,except:

Lipids would be found primarily in the cell wall of

Give examples of microorganisms that are prokaryotes and eukaryotes. What microorganism does not fit in either category? Describe three differences between prokaryotes and eukaryotes.

Endospores are typically found in the genera

Which of the following statements is false?

Which is the correct ordering of cell wall components starting from outside the cell and going inward?

Scope and History of Microbiology

Fundamentals of Chemistry

Microscopy and Staining

Essential Concepts of Metabolism

Growth and Culturing of Bacteria

Microbial Genetics

Gene Transfer and Genetic Engineering

An Introduction to Taxonomy: the Bacteria

Viruses

Eukaryotic Microorganisms and Parasites

Sterilization and Disinfection

Antimicrobial Therapy

Host-Microbe Relationships and Disease Processes

Epidemiology and Nosocomial Infections

Innate Host Defenses

Immunology I: Basic Principles of Adaptive Immunity and Immunization

Immunolgy Ii: Immunological Disorders and Tests

Diseases of the Skin and Eyes; Wounds and Bites

Urogenital and Sexually Transmitted Diseases

Diseases of the Respiratory System

Oral and Gastrointestinal Diseases

Cardiovascular, lymphatic and Systemic Disease

Diseases of the Nervous System

Environmental Microbiology

Applied Microbiology

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