Microbiology 020 - General Microbiology » Fall 2021 » Exam 1

Need help with your exam preparation?

Question #1
The _____ of the microscope holds and allows selection of the objective lenses.
A.   nosepiece
B.   ocular
C.   stage
D.   condenser
E.   objective
Question #2
The site(s) for most ATP synthesis in bacterial cells is(are) the _______.
A.   inclusions
B.   ribosomes
C.   mitochondria
D.   cell membrane
E.   cell wall
Question #3
Peptidoglycan is a unique macromolecule found in bacterial _______.
A.   cell membranes
B.   cell walls
C.   capsules
D.   inclusions
E.   slime layers
Question #4
In eukaryotic cells, ribosomes have two locations: scattered in the ________ and on the surface of the _________.
A.   cytoplasm; endoplasmic reticulum
B.   nucleus; endoplasmic reticulum
C.   cytoplasm; Golgi apparatus
D.   nucleus; Golgi apparatus
Question #5
A microbiologist inoculates Staphylococcus aureus into a culture medium. Following incubation, both Staphylococcus aureus and Staphylococcus epidermidis are determined to be growing in this culture. What is the most likely explanation?
A.   The incubation temperature was incorrect.
B.   The culture medium must be differential.
C.   The culture is contaminated.
D.   The microbiologist used too much inoculum.
E.   The culture medium must be selective.
Question #6
Mitochondria possess all of the following except ________.
A.   70S ribosomes (prokaryote)
B.   electron transport chain proteins
C.   cristae
D.   enzymes for photosynthesis
E.   enzymes for metabolism
Question #7
Which of the features listed below is not found in all cells?
A.   DNA
B.   Ribosomes
C.   Nucleus
D.   Cytoplasmic membrane
Question #8
What part of a phospholipid forms hydrophobic tails?
A.   Phosphate
B.   Fatty acids
C.   Alcohol
D.   All of the choices are correct.
E.   Glycerol
Question #9
Which of the following is not a function of the eukaryote glycocalyx?
A.   Protection
B.   Adherence
C.   Movement
D.   All of the choices are functions.
E.   Reception of chemical signals
Question #10
Spirochetes have a twisting and flexing locomotion due to appendages called _______.
A.   fimbriae
B.   periplasmic flagella (axial filaments)
C.   cilia
D.   sex pili
E.   flagella
Question #11
A fat is called ______ if all carbons of the fatty acid chain are single bonded to two other carbons and two hydrogens.
A.   unsaturated
B.   monounsaturated
C.   None of the choices are correct.
D.   polyunsaturated
E.   saturated
Question #12
Lysozyme is most effective against _______.
A.   cyanobacteria
B.   gram-positive organisms
C.   gram-negative organisms
D.   archaea
E.   mycoplasmas
Question #13
Which of the following is not an inoculating tool?
A.   Swab
B.   Needle
C.   Pipette
D.   Petri dish
E.   Loop
Question #14
The cell's series of tunnel-like membranes functioning in transport and storage are the _______.
A.   endoplasmic reticulum
B.   Golgi apparatus
C.   chloroplasts
D.   mitochondria
E.   lysosomes
Question #15
Which method often results in colonies developing down throughout the agar along with some colonies on the surface?
A.   Pour plate
B.   Streak plate
C.   Spread plate
D.   None of the choices are correct.
E.   All of the choices are correct.
Question #16
Helminths are _____.
A.   bacteria
B.   infectious particles
C.   molds
D.   protozoa
E.   parasitic worms
Question #17
The term that refers to the purposeful addition of microorganisms into a laboratory nutrient medium is _____.
A.   contamination
B.   inoculation
C.   isolation
D.   infection
E.   immunization
Question #18
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.   nucleosome
B.   chromatin
C.   nucleolus
D.   nucleoplasm
E.   nuclear envelope
Question #19
Which is not a characteristic of fungi?
A.   Heterotrophic nutrition
B.   Photosynthetic
C.   Include single-celled and filamentous forms
D.   Can use a wide variety of nutrients
E.   Have cell walls
Question #20
The cell _______ can be composed of three layers: the cytoplasmic membrane, the cell wall, and the outer membrane.
A.   glycocalyx
B.   slime coat
C.   pathogenic package
D.   envelope
E.   None of the choices is correct.
Question #21
Which of the following is found in eukaryotic cells but not in the cells of bacteria?
A.   Lysosomes
B.   Endoplasmic reticulum
C.   Nucleus
D.   All of the choices are correct.
E.   Mitochondria
Question #22
Protists include ______.
A.   helminths
B.   algae and protozoa
C.   None of the choices are correct.
D.   yeasts and molds
E.   All of the choices are correct.
Question #23
The best definition of endosymbiosis is ________.
A.   A eukaryotic cell ingested a bacterial cell and the organelles fused producing a larger cell
B.   A photosynthetic bacterial cell and an aerobic bacterial cell fused to become a larger, eukaryotic cell
C.   A DNA virus, a bacteria and a photosynthetic prokaryote fused to form a nucleus, a chloroplast and a mitochondria
D.   A pre-eukaryotic cell was infected by a prokaryote, and symbiosis between the two cell types gave rise to the modern-day eukaryotic cell
Question #24
Movement of a cell toward a chemical stimulus is termed _______.
A.   negative chemotaxis
B.   a tumble
C.   negative phototaxis
D.   positive chemotaxis
E.   positive phototaxis
Question #25
A nutrient medium that contains at least one ingredient that is NOT chemically definable would be termed _____.
A.   synthetic
B.   reducing
C.   complex
D.   enriched
E.   minimal
Question #26
The first primitive eukaryotic cells likely evolved from ______.
A.   bacteria
B.   the last common ancestor
C.   prokaryotes
D.   archaea
E.   None of the choices are correct.
Question #27
Which of the following is a unique characteristic of viruses that distinguishes them from the other major groups of microorganisms?
A.   Lack cell structure
B.   Cause human disease
C.   Cannot be seen without a microscope
D.   Contain genetic material
E.   Lack a nucleus
Question #28
The correct microbiological term for the tiny sample of specimen that is put into a nutrient medium in order to produce a culture is the _____.
A.   streak
B.   incubator
C.   colony
D.   inoculum
E.   loop
Question #29
The Gram staining procedure is best described as a(n) _______ staining technique.
A.   simple
B.   acid-fast or Ziehl-Neelson
C.   differential
D.   flagellar
E.   capsule
Question #30
The purpose of staining cells on a microscope slide is to ______.
A.   add contrast in order to see them better
B.   see motility
C.   enlarge the cells
D.   secure them to the slide
E.   kill them
Question #31
Choose the statement that best describes the role of mitochondria.
A.   Control the transport of materials into and out of the cell
B.   Provide cell with energy through cell respiration
C.   Store the genetic information of the cell
D.   Contain hydrolytic enzymes to digest macromolecules
E.   Assemble amino acids into polypeptides
Question #32
Which term is not used to describe bacterial cell shapes?
A.   Coccus
B.   Vibrio
C.   Spirochete
D.   Rod
E.   Tetrad
Question #33
The group of protozoa that have gliding motility are the _______.
A.   amoeba/sarcodina
B.   None of the choices are correct.
C.   apicomplexa/sporozoa
D.   mastigophora
E.   ciliophora
Question #34
Agar is a complex polysaccharide that comes from a(n) _____.
A.   euglena
B.   mold
C.   fungus
D.   algae
E.   green plant
Question #35
Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
A.   hydrogen
B.   nitrogen
C.   oxygen
D.   carbon
E.   phosphorous
Question #36
Chemotaxis refers to the ability to ________.
A.   transport desired molecules into cells
B.   move in response to light
C.   move in response to a chemical
D.   None of the choices is correct.
E.   not move in response to a chemical
Question #37
  
A.   glycerol and fatty acids
B.   nucleotides
C.   phosphate, glycerol, and fatty acids
D.   monosaccharides
E.   amino acids
Question #38
A bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is _______.
A.   gram-positive
B.   gram-negative
C.   found in archaea
D.   acid fast
E.   a spheroplast
Question #39
Which of the following does not pertain to endotoxin?
A.   It is a specific cell wall lipid
B.   It can stimulate fever in the human body
C.   It is involved in typhoid fever and some meningitis cases
D.   It can cause septic shock in the human body
E.   It is found in acid-fast bacterial cell walls
Question #40
Purines and pyrimidines are components in the building block units of all _____.
A.   polysaccharides
B.   carbohydrates
C.   nucleic acids
D.   amino acids
E.   enzymes
Question #41
Which of the following are mismatched?
A.   Saprobe - obtain nutrients from the remains of dead plants and animals
B.   Heterotroph - synthesize organic nutrients using light energy and CO2
C.   Parasite - obtain nutrients from a living organism to the detriment of that organism
Question #42
The lipid group that serves as energy storage molecules is _____.
A.   phospholipids
B.   triglycerides
C.   waxes
D.   prostaglandins
E.   steroids
Question #43
Which of the following is not a benefit of agar as a solid medium?
A.   Holds moisture
B.   Can be inoculated and poured at a temperature that is not harmful
C.   Is digested by most microbes
D.   Is solid at room temperature
E.   Has flexibility
Question #44
The type of microscope in which you would see brightly illuminated specimens against a black background is _____.
A.   phase contrast
B.   electron
C.   dark field
D.   bright field
E.   fluorescence
Question #45
The passageways in the nuclear envelope for movement of substances to and from the nucleus and cytoplasm are called nuclear ________.
A.   chromatin
B.   pores
C.   histones
D.   endoplasmic reticulum
E.   inclusions
Question #46
Choose the term that best describes the role of protozoan cysts.
A.   Protozoan cysts are necessary for the infection of intermediate hosts while the trophozoites are the stage that infects definitive hosts.
B.   Protozoan cysts are the active, growing stage of the organism.
C.   Protozoan cysts are a survival form that allows them to survive adverse environmental conditions between hosts.
D.   Protozoan cysts are a reproductive stage.
Question #47
The enzyme _______, found in tears and saliva, can hydrolyze the bonds in the glycan chains of certain bacterial cell walls.
A.   penicillinase
B.   lysozyme
C.   None of the choices are correct.
D.   peptidase
E.   All of the choices are correct.
Question #48
The two functions of bacterial appendages are ________.
A.   motility and slime production
B.   attachment and protection
C.   attachment and motility
D.   energy reactions and synthesis
E.   protection and motility
Question #49
There are nine peripheral pairs and one central pair of _______ found inside eukaryotic flagella and cilia.
A.   None of the choices are correct.
B.   microtubules
C.   Cilia
D.   flagella
E.   filaments
Question #50
Most biochemical macromolecules are polymers, which are chains of ______.
A.   hydrogen bonds
B.   repeating carbohydrates
C.   repeating monomers
D.   hydrophobic molecules
E.   electrolytic molecules

Need help with your exam preparation?