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 Photosynthetic

B Include single-celled and filamentous forms

C Heterotrophic nutrition

D Can use a wide variety of nutrients

E Have cell walls

Question #2

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

A heterotrophic nutrition

B ectoplasm and endoplasm

C motility

D cell wall

E formation of a cyst stage

Question #3

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

A sporozoite

B oocyst

C trophozoite

D cyst

E food vacuole

Question #4

Filamentous fungi are called _______.

A pseudohyphae

B dimorphic

C septa

D molds

E mycelium

Question #5

Which is mismatched?

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

B Histoplasma—fungus that causes Ohio Valley fever

C Naegleria—amoeba that causes brain infection

D Trichomonas—sexually transmitted vaginal infection

E Plasmodium—protozoan that causes Chagas disease

Question #6

Histones are ________.

A enzymes found in lysosomes

B proteins of the cytoskeleton

C on the surface of rough endoplasmic reticulum

D proteins associated with DNA in the nucleus

E found in polyribosomes

Question #7

Select the organisms that typically have cell walls.

A Algae, Protozoa and Animals

B 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 dimorphic

B pseudohyphae

C spores

D parasites

E saprobes

Question #9

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

A nonseptate

B dimorphic

C saprobes

D substrates

E parasites

Question #10

The site for ribosomal RNA synthesis is the ______.

A nucleolus

B lysosome

C ribosome

D Golgi apparatus

E nucleus

Question #11

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

A Protozoa, Bacteria, Viruses and Archaea

B 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 phototaxis

B facilitate chemotaxis

C contain microtubules

D are long, whiplike structures

E are used for cell motility

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 lysosome

C endoplasmic reticulum

D chloroplast

E mitochondria

Question #14

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

A seed

B trophozoite

C cyst

D sporozoa

E endospore

Question #15

The cytoskeleton ________.

A All of the choices are correct.

B provides support

C anchors organelles

D helps maintain cell shape

E functions in movements of the cytoplasm

Question #16

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

A None of the choices are correct.

B flagella

C microtubules

D filaments

E cilia

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 nucleolus

B nucleoplasm

C nuclear envelope

D chromatin

E nucleosome

Question #18

Select characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes.

A Transport systems, Selectively permeable barrier, and Sterols

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

C Sterols, Transport systems and Phospholipid bilayer

D Sterols, Selectively permeable barrier, and Embedded proteins

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 Vibrio

B Rod

C Spirochete

D Tetrad

E Coccus

Question #21

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

A sex pili

B fimbriae

C flagella

D periplasmic flagella (axial filaments)

E cilia

Question #22

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

A All of the choices are correct.

B Capsule

C Fimbriae

D Cell membrane

E Slime layer

Question #23

Plasmids ________.

A cannot be passed between organisms

B are essential for growth and metabolism

C are often the site of pathogenic genes

D are found in all bacteria

E cannot be passed on to progeny

Question #24

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

A slime layer

B capsule

C fimbriae

D LPS

E inclusions

Question #25

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

A monotrichous

B lophotrichous

C atrichous

D amphitrichous

E peritrichous

Question #26

Bacterial endospores are not produced by _______.

A Staphylococcus

B Sporosarcina

C Clostridium

D Bacillus

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 fimbriae

B sex pili

C flagella

D periplasmic flagella (axial filaments)

E cilia

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-positive

D gram-negative

E acid fast

Question #30

The chemical components of ribosomes are proteins and _______.

A mRNA

B All of thechoices are correct.

C None of thechoices is correct.

D rRNA

E tRNA

Question #31

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

A gram-negative

B both gram-positive and -negative

C gram-positive

Question #32

Lysozyme is most effective against _______.

A cyanobacteria

B gram-positive organisms

C mycoplasmas

D archaea

E gram-negative organisms

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 living structures

C All of the choices are correct.

D resistant to destruction by radiation

E metabolically inactive

Question #35

Peptidoglycan is a unique macromolecule found in bacterial _______.

A inclusions

B capsules

C cell membranes

D slime layers

E cell walls

Question #36

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

A The uppermost layer is made of lipopolysaccharides.

B The lipid portionof the lipopolysaccharide layer is an endotoxin.

C Gram-positivebacteria have an outer membrane.

D The porinproteins create channels through the outer membrane.

E The innermost layer is a phospholipid bilayer.

Question #37

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

A filament

B outer membrane

C sheath

D basal body

E hook

Question #38

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

A microaerophilic

B fastidious

C autotrophic

D aerobic

E anaerobic

Question #39

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

A Objective lens

B Condenser

C Body

D Nosepiece

E Ocular lens

Question #40

Which of the following is not an inoculating tool?

A Pipette

B Swab

C Loop

D Needle

E Petri dish

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 a type of compound microscope

C it is commonly used to diagnose certain infections

D it uses electrons to produce a specimen image

E it requires an ultraviolet radiation source

Question #42

A common medium used for growing fastidious bacteria is ______.

A a reducing medium

B MacConkey medium

C blood agar

D trypticase soy agar

E mannitol salt agar

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 Enriched

B Differential

C Enumeration

D Reducing

E Selective

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 Refraction

C None of the choices are correct.

D Resolving power

E Magnification

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 simple staining

B negative staining

C using an acidic dye

D using the acid-fast stain

E capsule 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 Transmission electron

C Fluorescence

D Scanning electron

E Phase contrast

Question #48

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

A negative stain

B flagellar stain

C hanging drop

D Gram stain

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 culturemedium must be selective.

B The culture iscontaminated.

C The incubationtemperature was incorrect.

D Themicrobiologist used too much inoculum.

E The culturemedium must be differential.

Question #50

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

A Holds moisture

B Has flexibility

C Is solid at room temperature

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

E Is digested by most microbes

Question #51

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

A minimal

B enriched

C reducing

D complex

E synthetic

Question #52

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

A Dark field

B Fluorescence

C Phase contrast

D Bright 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 General purpose

B Transport

C Thioglycollate

D EMB

E Blood

Question #54

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

A mold

B euglena

C green plant

D fungus

E algae

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 phase contrast

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 recombinant DNA

B bioremediation

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

D nomenclature

E determining evolutionary relatedness

Question #59

Helminths are _____.

A molds

B protozoa

C parasitic worms

D bacteria

E infectious particles

Question #60

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

A oxygen

B hydrogen

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 FALSE

B TRUE

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 Archaea are larger than eukaryotic microorganisms but smaller than bacteria

D Bacteria are larger than viruses

Question #64

Taxonomy does not involve _____.

A classification

B nomenclature

C identification

D taxa

E common name

Question #65

The most prevalent worldwide infectious diseases are _____.

A AIDS-related diseases

B malaria diseases

C respiratory diseases

D diarrheal diseases

E measles

Question #66

Select the correct descending taxonomic hierarchy:

A family, order,class

B class, phylum,order

C kingdom, domain,phylum

D family, genus,species

E genus, species,family

Question #67

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

A Viruses

B Helminths

C Parasites

D Bacteria

E Fungi

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 pathogens

E fermenters

Question #70

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

A bioremediation

B immunology

C epidemiology

D genetic engineering

E taxonomy

Question #71

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

A fermenters

B decomposers

C prokaryotes

D pathogens

E eukaryotes

Question #72

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

A a specific microbe should be classified in a specific kingdom

B microbes can be used to clean up toxic spills

C a specific microbe is the cause of a specific disease

D life forms can only arise from preexisting life forms

E microbes are found on dust particles

Question #73

All microorganisms are best defined as organisms that ______.

A are infectious particles

B are too small to be seen with the unaided eye

C cause human disease

D can only be found growing in laboratories

E lack a cell nucleus

Question #74

All of the following are lipids except _____.

A triglyceride

B starch

C cholesterol

D wax

E phospholipid

Question #75

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

A Joseph Lister

B Francesco Redi

C Louis Pasteur

D Robert Koch

E Antonie van Leeuwenhoek

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