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WorksheetsMidterm Review Chapters 4 - 7
Total questions: 38
Worksheet time: 19mins
When a rod-shaped bacteria is plump and short, it is called a
spirochete
spirillum
vibrio
coccobacillus
Chemical analysis of a bacterial cell structure detects calcium dipicolinic acid. What is the identity of this structure?
capsule
endospore
cell wall
slime layer
The bacterial chromosome
forms a single linear strand of DNA
is part of the nucleoid
is located in the cell membrane
contains all the cell's plasmids
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called
cilia
flagella
sex pili
fimbriae
Which of the following characteristics is not a property of cells or living things?
cell boundary
ability to replicate
responds to stimulus
nucleus
Peptidoglycan is a unique macromolecule found in bacterial
cell walls
cell membranes
slime layers
inclusions
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called
periplasmic flagella
fimbriae
pili
cillia
Sarcinae refers to
a cuboidal packet of cells
cocci in pairs
vibrios in threes
groups of endospores
Enodspores are
metabolically inactive
living structures
resistant to heat and chemical destruction
all of these are correct
Which cell structure is an important component in modern genetic engineering?
mesosomes
ribosomes
plasmids
capsules
The term that refers to the presence of flagella all over the cell surface is
monotrichous
amphitrichous
peritrichous
lophotrichouse
Larvae and eggs are developmental forms of
protozoa
helminths
fungi
algae
Cell walls are not found on typical cells of
bacteria
protozoa
fungi
algae
In eukaryotic cells, the structure primarily responsible for the adherence of cells to surfaces in the environment and the formation of biofilms is the
glycocalyx
cilia
flagella
cell membrane
A mold is observed to have asexual conidia, sexual spores within a sac, and septate hyphae. It is most likely classified in the
Fungi Imperfecti
Basidiomycota
Ascomycota
Zygomycota
Protists include
algae and protozoa
helmiths
yeasts and mold
all of these choices are correct
The organelle involved in intracellular digestion of food particles is the
transitional vesicle
mitochondria
Golgi apparatus
lysosome
All of the following are helminths except
pinworms
roundworms
trypanosomes
flukes
The cytoskeleton
functions in movements of the cytoplasm
provides support
helps maintain cell shape
all of these are correct
Sources for human infection with worms are all of the following except
infected animals
contaminated air
contaminated food
contaminated soil
Chitin is a chemical component of the cell walls of
fungi
algae
protozoa
bacteria
When buds remain attached, they form a chain of yeast cells called
septa
pseudohyphae
molds
mycelium
Which of the following spores are produced within a sac?
blastospores
zygospores
arthrospores
sporagiospores
The core of every virus particle always contains
DNA and RNA
DNA
either DNA or RNA
capsomers
Viruses acquire envelopes around their nucleocapsids during
penetration
adsorption
assembly
release
Classification of viruses into families involves determining all the following characteristics except
type of nucleic acid
presence of an envelope
type of capsid
biochemical reactions
Viral cultivation is used for
observing the effects of viral infections on host cells
preparation of vaccines
diagnosis of viral infections
all of these are correct
Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?
an enveloped virus
DNA virus
RNA virus
nonenveloped virus
Helical and icosahedral are terms used to describe the shapes of a virus
core
capsid
envelope
spike
Which of the following terms refers to microorganisms that live in or on the body and cause harm?
mesophiles
halophiles
pathogens
commensals
The phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but not growing is the
lag phase
stationary phase
prophase
death phase
Microorganisms that live in sever habitats, such as very hot, acidic or salty environments, are called
psychrophiles
barophiles
extremeophiles
halophiles
The time interval from parent cell to two new daughter cells is called the
culture time
generation time
binary fission
growth curve
Nutrient adsorption is mediated by the
peptidoglycan layer
cell membrane
cell wall
nuclear membrane
An organism that can exist in both oxygen and oxygen-free environments is a(n)
facultative anaerobe
aerobe
obligate aerobe
obligate anaerobe
Organisms that feed on dead organisms for nutrients are called
photorophs
autotrophs
saprobes
parasites
Microbes in a close relationship in which one benefits and the other is not harmed is called
satellitism
commensalism
mutualism
synergism
In ___ conditions, the cell wall will help prevent the cell from bursting.
isotonic
hypertonic
hypotonic
mesotonic
