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 Have cell walls

B Heterotrophic nutrition

C Can use a wide variety of nutrients

D Include single-celled and filamentous forms

E Photosynthetic

Question #2

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

A motility

B cell wall

C heterotrophic nutrition

D ectoplasm and endoplasm

E formation of a cyst stage

Question #3

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

A cyst

B oocyst

C food vacuole

D sporozoite

E trophozoite

Question #4

Filamentous fungi are called _______.

A septa

B molds

C pseudohyphae

D mycelium

E dimorphic

Question #5

Which is mismatched?

A Trichomonas—sexually transmitted vaginal infection

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

C Naegleria—amoeba that causes brain infection

D Histoplasma—fungus that causes Ohio Valley fever

E Plasmodium—protozoan that causes Chagas disease

Question #6

Histones are ________.

A enzymes found in lysosomes

B found in polyribosomes

C proteins of the cytoskeleton

D on the surface of rough endoplasmic reticulum

E proteins associated with DNA in the nucleus

Question #7

Select the organisms that typically have cell walls.

A Algae, Protozoa and Animals

B Algae, Plants, and Fungi

C Fungi, Protozoa and Animals

D 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 pseudohyphae

C dimorphic

D spores

E saprobes

Question #9

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

A dimorphic

B saprobes

C parasites

D substrates

E nonseptate

Question #10

The site for ribosomal RNA synthesis is the ______.

A ribosome

B lysosome

C Golgi apparatus

D nucleus

E nucleolus

Question #11

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

A Protozoa, Bacteria, Viruses and Archaea

B Algae, Protozoa, Helminths, and Fungi

C Protozoa, Bacteria, Viruses and Fungi

D Bacteria, Viruses and Archaea

Question #12

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

A are used for cell motility

B are long, whiplike structures

C facilitate phototaxis

D contain microtubules

E facilitate chemotaxis

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 trophozoite

B sporozoa

C cyst

D endospore

E seed

Question #15

The cytoskeleton ________.

A helps maintain cell shape

B functions in movements of the cytoplasm

C All of the choices are correct.

D provides support

E anchors organelles

Question #16

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

A filaments

B cilia

C flagella

D microtubules

E None of the choices are correct.

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 nucleoplasm

B nuclear envelope

C chromatin

D nucleosome

E nucleolus

Question #18

Select characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes.

A Sterols, Selectively permeable barrier, and Embedded proteins

B Sterols, Transport systems and Phospholipid bilayer

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

D Transport systems, Selectively permeable barrier, and Sterols

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 Coccus

D Vibrio

E Spirochete

Question #21

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

A sex pili

B flagella

C fimbriae

D cilia

E periplasmic flagella (axial filaments)

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 are found in all bacteria

B cannot be passed on to progeny

C are often the site of pathogenic genes

D cannot be passed between organisms

E are essential for growth and metabolism

Question #24

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

A LPS

B slime layer

C inclusions

D capsule

E fimbriae

Question #25

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

A atrichous

B amphitrichous

C lophotrichous

D monotrichous

E peritrichous

Question #26

Bacterial endospores are not produced by _______.

A Staphylococcus

B Clostridium

C Sporosarcina

D All of thechoices are correct.

E Bacillus

Question #27

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

A TRUE

B FALSE

Question #28

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

A flagella

B sex pili

C cilia

D periplasmic flagella (axial filaments)

E fimbriae

Question #29

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

A gram-negative

B acid fast

C found in archaea

D gram-positive

E a spheroplast

Question #30

The chemical components of ribosomes are proteins and _______.

A mRNA

B rRNA

C tRNA

D None of thechoices is correct.

E All of thechoices are correct.

Question #31

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

B gram-positive

C gram-negative

D both gram-positive and -negative

Question #32

Lysozyme is most effective against _______.

A gram-negative organisms

B cyanobacteria

C gram-positive organisms

D mycoplasmas

E archaea

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 resistant to destruction by radiation

C All of the choices are correct.

D metabolically inactive

E living structures

Question #35

Peptidoglycan is a unique macromolecule found in bacterial _______.

A cell membranes

B cell walls

C slime layers

D inclusions

E capsules

Question #36

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

A The uppermost layer is made of lipopolysaccharides.

B The porinproteins create channels through the outer membrane.

C The innermost layer is a phospholipid bilayer.

D The lipid portionof the lipopolysaccharide layer is an endotoxin.

E Gram-positivebacteria have an outer membrane.

Question #37

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

A outer membrane

B sheath

C filament

D basal body

E hook

Question #38

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

A autotrophic

B microaerophilic

C fastidious

D aerobic

E anaerobic

Question #39

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

A Condenser

B Nosepiece

C Ocular lens

D Objective lens

E Body

Question #40

Which of the following is not an inoculating tool?

A Petri dish

B Swab

C Loop

D Needle

E Pipette

Question #41

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

A it requires the use of dyes like acridine and fluorescein

B it is commonly used to diagnose certain infections

C it requires an ultraviolet radiation source

D it is a type of compound microscope

E it uses electrons to produce a specimen image

Question #42

A common medium used for growing fastidious bacteria is ______.

A blood agar

B mannitol salt agar

C a reducing medium

D trypticase soy agar

E MacConkey 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 Reducing

B Enumeration

C Enriched

D Selective

E Differential

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 Magnification

C Resolving power

D None of the choices are correct.

E Refraction

Question #45

Select the methods below that enable the isolation of bacteria.

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

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

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

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

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 capsule staining

B simple staining

C using an acidic dye

D using the acid-fast stain

E negative staining

Question #47

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

A Differential interference contrast

B Scanning electron

C Phase contrast

D Transmission electron

E Fluorescence

Question #48

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

A negative stain

B Gram stain

C flagellar stain

D hanging drop

E fixed stained smear

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 The culture iscontaminated.

B The culturemedium must be selective.

C Themicrobiologist used too much inoculum.

D The incubationtemperature was incorrect.

E The culturemedium must be differential.

Question #50

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

A Is digested by most microbes

B Holds moisture

C Is solid at room temperature

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 reducing

B complex

C synthetic

D enriched

E minimal

Question #52

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

A Fluorescence

B Dark field

C Phase contrast

D Electron

E Bright field

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 Thioglycollate

B Blood

C General purpose

D Transport

E EMB

Question #54

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

A green plant

B fungus

C mold

D algae

E euglena

Question #55

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

A bright field

B electron

C fluorescence

D dark field

E phase contrast

Question #56

Select the elements necessary for good microscopy.

A Adequate magnification, Contrast, Resolution

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

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

D Ability to observe cells in the living state, Use of wavelengths other than the visible spectrum, 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 if that species is the cause of a new disease

B recombinant DNA

C determining evolutionary relatedness

D nomenclature

E bioremediation

Question #59

Helminths are _____.

A bacteria

B infectious particles

C parasitic worms

D protozoa

E molds

Question #60

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

A hydrogen

B oxygen

C carbon

D nitrogen

E phosphorous

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 eukaryotic microorganisms

B Eukaryotic microorganisms are smaller than viruses

C Bacteria are larger than viruses

D Archaea are larger than eukaryotic microorganisms but smaller than bacteria

Question #64

Taxonomy does not involve _____.

A identification

B nomenclature

C taxa

D common name

E classification

Question #65

The most prevalent worldwide infectious diseases are _____.

A measles

B respiratory diseases

C diarrheal diseases

D AIDS-related diseases

E malaria diseases

Question #66

Select the correct descending taxonomic hierarchy:

A family, order,class

B kingdom, domain,phylum

C genus, species,family

D family, genus,species

E class, phylum,order

Question #67

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

A Parasites

B Bacteria

C Fungi

D Helminths

E Viruses

Question #68

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

A FALSE

B TRUE

Question #69

Disease-causing microorganisms are called _____.

A fermenters

B decomposers

C prokaryotes

D eukaryotes

E pathogens

Question #70

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

A genetic engineering

B immunology

C taxonomy

D bioremediation

E epidemiology

Question #71

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

A prokaryotes

B fermenters

C decomposers

D pathogens

E eukaryotes

Question #72

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

A life forms can only arise from preexisting life forms

B microbes can be used to clean up toxic spills

C a specific microbe should be classified in a specific kingdom

D microbes are found on dust particles

E a specific microbe is the cause of a specific disease

Question #73

All microorganisms are best defined as organisms that ______.

A lack a cell nucleus

B are too small to be seen with the unaided eye

C are infectious particles

D can only be found growing in laboratories

E cause human disease

Question #74

All of the following are lipids except _____.

A cholesterol

B wax

C triglyceride

D phospholipid

E starch

Question #75

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

A Robert Koch

B Antonie van Leeuwenhoek

C Joseph Lister

D Louis Pasteur

E Francesco Redi

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