Lecture Exam 1 _Ch 1, 2, 3, 4

Navigation » List of Schools » East Los Angeles College » Microbiology » Microbiology 020 – General Microbiology » Winter 2022 » Lecture Exam 1 _Ch 1, 2, 3, 4

Need help with your exam preparation?

Existing Quiz Clients Login here

Below are the questions for the exam with the choices of answers:

Try The Exam

Question #1

Which is not a characteristic of fungi?

A Heterotrophic nutrition

B Have cell walls

C Can use a wide variety of nutrients

D Photosynthetic

E Include single-celled and filamentous forms

Question #2

All of the following are found in some or all protozoa except ________.

A heterotrophic nutrition

B ectoplasm and endoplasm

C formation of a cyst stage

D motility

E cell wall

Question #3

The motile, feeding stage of protozoa is called the _______.

A trophozoite

B cyst

C oocyst

D sporozoite

E food vacuole

Question #4

Filamentous fungi are called _______.

A molds

B mycelium

C septa

D pseudohyphae

E dimorphic

Question #5

Which is mismatched?

A Naegleria—amoeba that causes brain infection

B Giardia— causes intestinal distress; transmitted by feces in drinking water

C Plasmodium—protozoan that causes Chagas disease

D Histoplasma—fungus that causes Ohio Valley fever

E Trichomonas—sexually transmitted vaginal infection

Question #6

Histones are ________.

A enzymes found in lysosomes

B found in polyribosomes

C proteins associated with DNA in the nucleus

D on the surface of rough endoplasmic reticulum

E proteins of the cytoskeleton

Question #7

Select the organisms that typically have cell walls.

A Protozoa and Animals

B Algae, Protozoa and Animals

C Algae, Plants, and Fungi

D Fungi, Protozoa and Animals

Question #8

Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called _______.

A parasites

B spores

C saprobes

D pseudohyphae

E dimorphic

Question #9

Most fungi obtain nutrients from dead plants and animals. These fungi are called _______.

A dimorphic

B substrates

C nonseptate

D saprobes

E parasites

Question #10

The site for ribosomal RNA synthesis is the ______.

A nucleus

B lysosome

C nucleolus

D ribosome

E Golgi apparatus

Question #11

Select all of the groups on this list that contain eukaryotic microorganisms.

A Bacteria, Viruses and Archaea

B Protozoa, Bacteria, Viruses and Archaea

C Algae, Protozoa, Helminths, and Fungi

D Protozoa, Bacteria, Viruses and Fungi

Question #12

Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella ________.

A facilitate chemotaxis

B are long, whiplike structures

C facilitate phototaxis

D are used for cell motility

E contain microtubules

Question #13

An organelle that is a stack of flattened, membranous sacs and functions to receive, modify, and package proteins for cell secretion is the ________.

A Golgi apparatus

B mitochondria

C chloroplast

D lysosome

E endoplasmic reticulum

Question #14

During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a(n) ______.

A seed

B endospore

C sporozoa

D trophozoite

E cyst

Question #15

The cytoskeleton ________.

A anchors organelles

B provides support

C functions in movements of the cytoplasm

D helps maintain cell shape

E All of the choices are correct.

Question #16

There are nine peripheral pairs and one central pair of _______ found inside eukaryotic flagella and cilia.

A filaments

B cilia

C None of the choices are correct.

D flagella

E microtubules

Question #17

When a eukaryotic cell is not undergoing mitosis, the DNA and its associated proteins appear as a visible network of dark fibers called the _____.

A nuclear envelope

B nucleoplasm

C nucleolus

D nucleosome

E chromatin

Question #18

Select characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes.

A Transport systems, Selectively permeable barrier, and Sterols

B Sterols, Selectively permeable barrier, and Embedded proteins

C Phospholipid bilayer, Transport systems, Selectively permeable barrier, and Embedded proteins

D Sterols, Transport systems and Phospholipid bilayer

Question #19

The gram-positive cell wall is considered stronger than that of gram-negative cells since its hydrophobic outer membrane contains an endotoxin.

A TRUE

B FALSE

Question #20

Which term is not used to describe bacterial cell shapes?

A Tetrad

B Rod

C Vibrio

D Coccus

E Spirochete

Question #21

The short, numerous appendages used by some bacterial cells for adhering to surfaces are called _______.

A sex pili

B periplasmic flagella (axial filaments)

C cilia

D fimbriae

E flagella

Question #22

Which structure protects bacteria from being phagocytized by white blood cells?

A Slime layer

B Capsule

C Cell membrane

D All of the choices are correct.

E Fimbriae

Question #23

Plasmids ________.

A cannot be passed on to progeny

B cannot be passed between organisms

C are often the site of pathogenic genes

D are essential for growth and metabolism

E are found in all bacteria

Question #24

All of the following structures contribute to the ability of pathogenic bacteria to cause disease except the _______.

A fimbriae

B slime layer

C inclusions

D capsule

E LPS

Question #25

The term that refers to the presence of flagella over the cell surface is _______.

A amphitrichous

B atrichous

C monotrichous

D peritrichous

E lophotrichous

Question #26

Bacterial endospores are not produced by _______.

A Clostridium

B Staphylococcus

C Bacillus

D Sporosarcina

E All of thechoices are correct.

Question #27

When an endospore germinates, it develops into multiple vegetative cells ensuring reproductive success.

A FALSE

B TRUE

Question #28

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _______.

A cilia

B fimbriae

C flagella

D sex pili

E periplasmic flagella (axial filaments)

Question #29

A bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is _______.

A a spheroplast

B found in archaea

C gram-negative

D gram-positive

E acid fast

Question #30

The chemical components of ribosomes are proteins and _______.

A None of thechoices is correct.

B tRNA

C All of thechoices are correct.

D rRNA

E mRNA

Question #31

During the Gram stain, ______ cells decolorize when the alcohol is applied.

A gram-positive

B gram-negative

D both gram-positive and -negative

Question #32

Lysozyme is most effective against _______.

A archaea

B gram-negative organisms

C gram-positive organisms

D mycoplasmas

E cyanobacteria

Question #33

Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.

A TRUE

B FALSE

Question #34

Endospores are ________.

A resistant to heat and chemical destruction

B All of the choices are correct.

C living structures

D metabolically inactive

E resistant to destruction by radiation

Question #35

Peptidoglycan is a unique macromolecule found in bacterial _______.

A inclusions

B slime layers

C cell membranes

D capsules

E cell walls

Question #36

Which of the following is not true of the outer membrane?

A Gram-positivebacteria have an outer membrane.

B The lipid portionof the lipopolysaccharide layer is an endotoxin.

C The porinproteins create channels through the outer membrane.

D The uppermost layer is made of lipopolysaccharides.

E The innermost layer is a phospholipid bilayer.

Question #37

A flagellum is anchored into the bacterial cell envelope by its _______.

A basal body

B filament

C hook

D sheath

E outer membrane

Question #38

Bacteria that require special growth factors and complex nutrients are termed _____.

A aerobic

B anaerobic

C microaerophilic

D fastidious

E autotrophic

Question #39

Which of the following magnifies the specimen to produce its real image?

A Nosepiece

B Condenser

C Objective lens

D Ocular lens

E Body

Question #40

Which of the following is not an inoculating tool?

A Loop

B Needle

C Petri dish

D Pipette

E Swab

Question #41

All of the following pertain to the fluorescence microscope except ______.

A it uses electrons to produce a specimen image

B it requires an ultraviolet radiation source

C it requires the use of dyes like acridine and fluorescein

D it is a type of compound microscope

E it is commonly used to diagnose certain infections

Question #42

A common medium used for growing fastidious bacteria is ______.

A MacConkey medium

B trypticase soy agar

C blood agar

D mannitol salt agar

E a reducing medium

Question #43

Which type of medium is able to distinguish different species or types of microorganisms based on an observable change in the colonies or in the medium?

A Enumeration

B Selective

C Enriched

D Differential

E Reducing

Question #44

Which of the following characteristics refers to the microscope’s ability to show two separate entities as separate and distinct?

A All of thechoices are correct.

B None of the choices are correct.

C Resolving power

D Refraction

E Magnification

Question #45

Select the methods below that enable the isolation of bacteria.

A Gram stain, Loop dilution, Bright-field microscopy, Use of selective media,

B Loop dilution, Spread plate, Use of selective media, Quadrant streak plate

C Gram stain, Loop dilution, Spread plate, Use of selective media,

D Gram stain, Bright-field microscopy, Spread plate, Use of selective media,

Question #46

A microbiologist makes a fixed smear of bacterial cells and stains them with Loeffler’s methylene blue. All the cells appear blue under the oil lens. This is an example of ______.

A negative staining

B capsule staining

C using the acid-fast stain

D using an acidic dye

E simple staining

Question #47

Which type of microscope bombards a whole, metal-coated specimen with electrons moving back and forth over it?

A Transmission electron

B Scanning electron

C Phase contrast

D Differential interference contrast

E Fluorescence

Question #48

The specimen preparation that is best for viewing cell motility is ______.

A flagellar stain

B fixed stained smear

C hanging drop

D Gram stain

E negative stain

Question #49

A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium. Following incubation, only the E. coli grows in the culture. What is the most likely explanation?

A Themicrobiologist used too much inoculum.

B The culturemedium must be differential.

C The culturemedium must be selective.

D The incubationtemperature was incorrect.

E The culture iscontaminated.

Question #50

Which of the following is not a benefit of agar as a solid medium?

A Is solid at room temperature

B Holds moisture

C Is digested by most microbes

D Can be inoculated and poured at a temperature that is not harmful

E Has flexibility

Question #51

A nutrient medium that contains at least one ingredient that is NOT chemically definable would be termed _____.

A enriched

B complex

C synthetic

D reducing

E minimal

Question #52

Which type of microscope does not use light in forming the specimen image?

A Fluorescence

B Phase contrast

C Bright field

D Dark field

E Electron

Question #53

Which type of media would be the best choice when shipping a sample of bacteria to a laboratory to be tested from a satellite office site?

A Blood

B EMB

C General purpose

D Thioglycollate

E Transport

Question #54

Agar is a complex polysaccharide that comes from a(n) _____.

A algae

B green plant

C euglena

D fungus

E mold

Question #55

The type of microscope in which you would see brightly illuminated specimens against a black background is _____.

A phase contrast

B bright field

C electron

D fluorescence

E dark field

Question #56

Select the elements necessary for good microscopy.

A Ability to observe cells in the living state, Adequate magnification, Specimen holder

B Ability to observe cells in the living state, Use of wavelengths other than the visible spectrum, Specimen holder

C Adequate magnification, Contrast, Resolution

D Ability to observe cells in the living state, Contrast, Specimen holder

Question #57

Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.

A TRUE

B FALSE

Question #58

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on ________.

A determining evolutionary relatedness

B determining if that species is the cause of a new disease

C nomenclature

D bioremediation

E recombinant DNA

Question #59

Helminths are _____.

A infectious particles

B molds

C bacteria

D protozoa

E parasitic worms

Question #60

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

A phosphorous

B hydrogen

C nitrogen

D oxygen

E carbon

Question #61

Most microorganisms that are found in and on humans do not cause harm and can sometimes benefit the host.

A TRUE

B FALSE

Question #62

All proteins are enzymes.

A TRUE

B FALSE

Question #63

Which statement correctly compares the sizes of different microorganisms?

A Bacteria are larger than viruses

B Eukaryotic microorganisms are smaller than viruses

C Archaea are larger than eukaryotic microorganisms but smaller than bacteria

D Bacteria are larger than eukaryotic microorganisms

Question #64

Taxonomy does not involve _____.

A common name

B classification

C taxa

D identification

E nomenclature

Question #65

The most prevalent worldwide infectious diseases are _____.

A AIDS-related diseases

B respiratory diseases

C diarrheal diseases

D malaria diseases

E measles

Question #66

Select the correct descending taxonomic hierarchy:

A genus, species,family

B class, phylum,order

C kingdom, domain,phylum

D family, genus,species

E family, order,class

Question #67

Which group of microorganisms is composed only of hereditary material wrapped in a protein covering?

A Fungi

B Bacteria

C Viruses

D Helminths

E Parasites

Question #68

Despite the lack of a membrane-bound nucleus, bacteria and archaea are cells with a complex organizational structure.

A TRUE

B FALSE

Question #69

Disease-causing microorganisms are called _____.

A prokaryotes

B eukaryotes

C decomposers

D fermenters

E pathogens

Question #70

When humans manipulate the genes of microorganisms, the process is called _____.

A epidemiology

B taxonomy

C genetic engineering

D bioremediation

E immunology

Question #71

Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called _____.

A decomposers

B eukaryotes

C prokaryotes

D pathogens

E fermenters

Question #72

Koch’s postulates are criteria used to establish that ______.

A a specific microbe is the cause of a specific disease

B microbes are found on dust particles

C a specific microbe should be classified in a specific kingdom

D microbes can be used to clean up toxic spills

E life forms can only arise from preexisting life forms

Question #73

All microorganisms are best defined as organisms that ______.

A cause human disease

B are infectious particles

C can only be found growing in laboratories

D are too small to be seen with the unaided eye

E lack a cell nucleus

Question #74

All of the following are lipids except _____.

A starch

B phospholipid

C triglyceride

D wax

E cholesterol

Question #75

The Dutch merchant who made and used quality magnifying lenses to see and record microorganisms was _____.

A Francesco Redi

B Robert Koch

C Antonie van Leeuwenhoek

D Louis Pasteur

E Joseph Lister

Try The Exam

Fresh Grad Lands Job as Real Estate Agent With Help from Professional Writers

Lecture Exam 1 _Ch 1, 2, 3, 4

Need help with your exam preparation?

Below are the questions for the exam with the choices of answers:

Christian S.

Tyra

Linda

Manush

We accept payment