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Worksheets;ecture biology exam 3rd
Total questions: 65
Worksheet time: 33mins
which of following is a function of noncoding DNA
encodes protiens
catalyzes enymatic reaction
regulates gene expression
packages histone proteins
which of the following RNA types helps form peptide bonds during translation
Mrna
Trna
Rrna
Sirna
what is quorum sensing
the method by which bacteria detoxity reactive oxygen species
a cell density dependent mechanism for coordinating gene expression
he use of pili to transfer dna between cells
ability of some bacteria to swim toward nutrients
which term best describes an organism that grows equally well with or without oxygen
Facultative anaerobe
obligate aerobe
obligate anaerobe
Aerotolerant anaerobe
which best describes an endergonic/anabolic reaction
a reaction that releases energy to the surrounding
a reaction that occurs spontaneously without the input of energy
a reaction that requires an input of energy to proceed
a reaction that results in the breakdown of large molecules in small
what did griffths experiment demonstrate
rna is the genetic material
bacteria cannot share genetic material
dna replication is semi conservative
non virulent bacteria can be transformed by gentic material from dead virulent bacteria
which rna type carries the amino acid to the ribosome
mrna
trna
rrna
mirna
which base is found in rna but not in dna
thymine
cytosine
uracil
guanine
what type of microbe prefers a basic(alkline) environement
neutrophile
psychrophile
acidophile
alkalphile
during which phase of the growth curve are bacteria most susceptible to antibiotic
lag
log
stationary
death
which of the following pathways generates the most ATP
glycolysis
krebs cycle
fermentation
electron transport chain
what is the primary purpose of fermentation in microbes
generate atp via oxidative phosphory lation
regenerate NAD+ from NADH for glycolysis in absence of oxygen
reduce oxygen levels in the cytoplasm
breakdown fatty acids
which molecule acts as the final electron aceptor in aerobic respiration
pyruvate
NAD+
oxygen
CO2
what determines the host range of a virus
the ability to undergo binary fission
the presence of compatiable receptors on a host cell
the type of nucleic acid it carries
its ability to form endospores
in the lysogenic cycle the viral genome integrates into the host dna and becomes a
capsid
plasmid
persister cell
prophage
which of the following correctly pairs a prokaryotic structure with its function
capsule-site of protein synthesis
endospore-movement through host tissue
plasmid-extachromosomal dna with benefical adventageous genes
ribosome-stores energy
what is the primary structal difference between gram positive and gram negative bacterial cell walls
thickness of the peptidoglycan layer and prescens outer membrane
amount of dna
presences of a nucleus
type of flagella
which of the following is evidence that supports the endosymbotic theory
mitochondira & chlorplast are only found in prokaryotic cell
mitocondria & chlorplast reproduce by mitiosis
eukaryotic cell uses binary fission
mitochondria & chlorplast have circular dna & divide by binary fission
which of the following groups of organisms is correctly match with its characteristics
fungi- autotrophic, multicellular,cell wall of cellulose
bacteria-prokaryotic, repordcue sexually have a nucelus
algae-eukaryotic photosynthesis cell wall of cellulose
prions-living,infectionous protien with rna
which statement most accurately explain k
microorganisms can be created in a lab to cure disease
all bacteria are pathogenic and follow universal pattern
a specific microorganisms can be linked to a specific disease using logical steps
only viruses can be used to determine disease origin
Exam 2
which resistance mechanism allows bacteria to actively remove antimicrobal agents from their cells
target modification
drug inactivation
efflux pumps
enzymatic bypass
which antibody isotype is primarily found in secretions such as breast milk & tears
IGA
IGG
IGE
IGM
what triggers a cytokine storm
helper t cell activation
overaction of regulatory t cells
superantigens causing unregulated t cell activation
inactivated vacciens
what is the function of MHC 2 molecules
present intracellular anitgens
presnt antigens to cytotoxic t cells
presnt antigens to helper cells
identify self cells to NK cells
which class of antibodies is the most abundant and can cross the placental barrier
IGA
IGD
IGE
IGG
which immune cells mature in thymus
b cell
t cell
NK cell
dendritic cell
what is the mode of action of b lactam antibiotics
inhibt proeitn synthesis
disrupt membrane integrity
block folic acid synthesis
inhibit peptidoglycan crosslinking
which is false about newly transcribed MRNA in prokaryotes
its immediately available for translation
must undergo post transcriptional modification
last for approximately 5 seconds before degrading
acts as a messenger to translate protien for cell
bactericidal antibitotics are preferred overbacteriostatic ones when treating
mild skin infections in healthy individuals
life threatening systemic infections in immuneocompromised patient
common cold
urinary tract infections
a diases acquired during hospitalization called
communicable
nosocomical
latrogenic
opportunistic
which innate defense mechanism utilizes opsonization to coat pathogen for easier phagocytosis(tagging)
lysozyme
complement system
IGG
interferon
which type of pathogen would most likely use antigenic variation as a method of immune evasion
bacteria
helminths
viruses
fungi
which virulenece factor allows a bacterium to avoid being engulfed by immune cells
kinases
capsules
coagulase
exotoxins
which of the followig is suitable for use on living tissue for microbial control to prevent infection
disinfectant
antiseptic
sterilant
water
transduction involves transfer of genetice material via
bacteriophage
naked dna
viruses
pili
which horizontail gene transfer method requires a pilus
transformation
transduction
conjunction
all of the above
which of the following types of mutation is mostly likely to have a drastic effectt on a protein function
silent mutation
missense mutation
frameshift muation
neutral mutation
which of the following correctly matches central dogma biology
Protien- dna-rna
dna-rna-protein
rna-dna-protien
protien-rna-dna
what is the purpose of promotor region in transcription
signal end of gene
to bind rna polymerase
remove introns
start dna replication
which enzyme is responsible for unwinding dna doubble helix during replication
ligase
primase
helicase
dna polymerase
exam 3
which of the following best describes borrelia burgdorferi
bacillus that causes plague
coccus that causes cat scratch disease
spirillum that causes rocky mt spotted fever
a spirochete that causes lyme diese
naeglena folweri meningoenecephlatitis commonly acquired by
exposure bird droppings
mosquito bites
ingestion of water contaminated w fecal material
swimming in warm pond/streams
what part of the immune system protect brain from infection but also limit access to be treatment
lymph nodes
microglia
thymus
blood brain barrier
what type of nervous system infection does toxoplasma gondi most often cause
encephalitus
guillain barrer syndrome
spinal menigitis
myelitis
which of the following is a fungal cause of meningitis often found immunocompromised indiviual
asperigullus fumigatus
coccidioides immitis
histoplasma capsulation
cryptococcus nefumans
poliovirus is primarily spread via
bloodborne transmission
respiratory droplets
fecal oral route
vector borne transmission
why is complete eradication of influenza a unlikely
vaccienes cant be produced
bc antigenic drift/shift and animal resvoir sustain new strains
bc respiratory infectious dont dpread by aerosals
bc its bacterium not a virus
which bacterium is assoicated with foodborne illnes and can cross the placental barrier in pregant women
bacillus cereus
listeria monocytogens
escherichia coli
clostridum botulinum
which disease if transmitted by anopheles mosquito
chagas disease
malaria
dengue
african sleeping sickness
genital warts and cervical cancer are assoicated w which virus
human papilloma virus
cytomegalovirus
herpes simplex virus 2
varicella zoster virus
primary vector for transmission of plague is
louse
tick
flea
mosoquito
which bacterial toxins cause flaccied paralysis and is sometimes ingested in food(honey)
tetanospasmim
shiga toxin
botulinum toxin
cholera toxin
which protozan cause watery foul smelly diaarrehea backpacker diarrehea and is commonly acquired from freshwater
entamoeba histallytica
trichomonae vaginaltis
giardia lambia
cryptospordium
which virus is most common cause of viral gastroenteritis in adult
rotavirus
hepaitis a
norovirus
adenovirus
which bacterium procedures a shiga like toxin and is linked to henolytic uremic syndrome(HUS)
salmonella typhi
vibrio chloerae
helicobacter pylori
e coli O157:H7
syphilis caused by
neisseria gonorrhoeae
treponema pallidum
gardnerella vaginalis
chlamydia trachomatis
pelvic inflammatory disease is a complication of which 2 stis
HPV & HIV
Syphillis & Chlamydia
Gonorrhea & Chlamydia
Hepatitus B & HPV
tuberculosis is transmitted via
insect vector
sexual contact
inhalation of respiratory droplet
fecal oral route
which organism is responsible for walking pneumonia
streptococcus pneumoniae
klebsiella pneumoniae
haemophillus influenzae
mycoplasma pneumoniae
which virus cause cold sores
cytomegalovirus
herpes simplex virus 1
human papillomavirus
epstein barr virus
which microorganism is responsible for trachoma cause of blindness
chlamydia trachomatius
haemophilus influenza
pseudomonas aeruginosa
candida albicans
which of the following cause nectoring fasciltitis
streptococcus pyogens
mycobacterium leprae
straphylococcus epidermidis
bacillus anthracis
which of the following disease is an autoimmune disorder that targets insulin producing b cells of pancrease
systeemic lupus erythematosus
multiple sclerosis
type 1 diabetes mellitus
rheumatoid arthritis
systemic lupus erythematosus (SLE) is best classified as which type of hypersensitivity
type 3
type 1
type 2
type 5 IV
which type of hypersensitivty is mediated by IGE and results in allergic reaction such as hay fever and anaphylaxis
type 2
type 1
type 3
type5 IV
