Part A
A procaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
A procaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
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Gram negative
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Gram positive
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Archaea
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Acid fast
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Part A
What structural part of a bacterial flagellum is composed of flagellin?
What structural part of a bacterial flagellum is composed of flagellin?
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Basal body
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Filament
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Rod
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HookSubmitHintsMy AnswersGive UpReview Part
Part B
How are Gram-positive and Gram-negative flagella different?
How are Gram-positive and Gram-negative flagella different?
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A Gram-positive flagellum does not have a membrane covering its filament; A Gram-negative flagellum does.
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Flagella are only found in Gram-negative bacteria.
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Each Gram-positive flagellum contains a hook; gram-negatives do not.
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A Gram-positive flagellum has only two rings in its basal body; Gram-negatives each have four.SubmitHintsMy AnswersGive UpReview Part
Part C
The rings
The rings
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are comprised of globular proteins called flagellin.
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are covered by a membrane.
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are curved structures into which each filament inserts.
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anchor the flagellum to the cell membrane.SubmitHintsMy AnswersGive UpReview Part
Part D
The basal body is comprised of which structural component(s) of flagella?
The basal body is comprised of which structural component(s) of flagella?
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Hook
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Rod
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Rod and Rings
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Filament
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Rod and Hook
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Rings SubmitHintsMy AnswersGive UpReview Part
Part E
Pathogenic bacteria
Pathogenic bacteria
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do not have flagella.
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are unique because they have a membrane covering the filament.
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have a unique basal body structure.
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can be identified and classified by differences in their flagellar proteins.SubmitHintsMy AnswersGive UpReview Part
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A gram-positive bacteria suddenly acquires resistance to the antibiotic methicillin. This trait most likely occurred due to
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conjugation.
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binary fission.
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meisosis.
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transformation.
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transduction.
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Which of the following is NOT found in mitochondria and prokaryotes?
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circular chromosome
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70S ribosomes
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cell wall
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binary fission
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ATP-generating mechanism
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Part A
Why is ATP necessary for active transport?
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ATP is a constituent of the electrochemical gradient.
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ATP is an important structural element of transport proteins.
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ATP is in higher concentrations inside of the cell.
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ATP provides energy to transfer material against its concentration gradient.
SubmitHintsMy AnswersGive UpReview Part
Part B
Which type of active transport protein moves two molecules into the cell at the same time?
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Uniport
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Antiport
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Symport
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Antiport and Symport
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Uniport, Symport, and AntiportSubmitHintsMy AnswersGive UpReview Part
Part C
Which transport protein employs transporters that move molecules only in one direction?
Which transport protein employs transporters that move molecules only in one direction?
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Uniport and Symport
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Uniport and Antiport
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Uniport
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Antiport
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Uniport, Antiport, and Symport
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SymportSubmitHintsMy AnswersGive UpReview Part
Part D
Which molecule shown in the animation, the square or the circle, is moving against its concentration gradient?
Which molecule shown in the animation, the square or the circle, is moving against its concentration gradient?
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The square
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Neither; they are both moving with their respective concentration gradients.
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Both the circle and the square
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The circleSubmitHintsMy AnswersGive UpReview Part
Part E
Which type of active transport protein uses one protein to pump two different molecules?
Which type of active transport protein uses one protein to pump two different molecules?
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Uniport
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Antiport and Symport
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Symport
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Antiport
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Uniport, Antiport, and Symport
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The reagents crystal violet, iodine, and safranin are all associated with which of the following staining procedures?
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Endospore stain
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Acid fast stain
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Flagella stain
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Gram stain
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Tumbles occur when
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the flagella rotate counterclockwise.
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the flagella stop rotating.
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the flagella undulate.
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the flagella rotate clockwise.SubmitHintsMy AnswersGive UpReview Part
Part B
Which of the following types of bacterial cells would have only a single flagellum?
Which of the following types of bacterial cells would have only a single flagellum?
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Lophotrichous
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Monotrichous
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Peritrichous
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Amphitrichous
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Lophotrichous and monotrichousSubmitHintsMy AnswersGive UpReview Part
Part C
Peritrichous bacteria make a run when
Peritrichous bacteria make a run when
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the flagella turn counterclockwise and become bundled.
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the flagella turn clockwise and become bundled.
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the flagella turn counterclockwise and separate.
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the flagella turn clockwise and separate.SubmitHintsMy AnswersGive UpReview Part
Part D
Which of the following types of bacterial cells would have flagella located at only one end of the cell?
Which of the following types of bacterial cells would have flagella located at only one end of the cell?
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Lophotrichous and monotrichous
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Monotrichous and amphitrichous
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Monotrichous
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Lophotrichous
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Amphitrichous
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PeritrichousSubmitHintsMy AnswersGive UpReview Part
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Part A
Which of the following statements about bacterial flagella is true?
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Bacteria can only rotate flagella clockwise.
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Flagella work by undulating.
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Flagella can rotate 360 degrees.
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Bacteria can only rotate flagella counterclockwise.SubmitHintsMy AnswersGive UpReview Part
Part B
Taxis is
Taxis is
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another word for stimulus.
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another term for bacterial tumbling.
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caused by the undulating motion of a bacterium.
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movement towards or away from a stimulus.SubmitHintsMy AnswersGive UpReview Part
Part C
Which of the following terms refers to a bacterium moving towards a light source?
Which of the following terms refers to a bacterium moving towards a light source?
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Positive chemotaxis
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Negative chemotaxis
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Positive phototaxis
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Negative phototaxisSubmitHintsMy AnswersGive UpReview Part
Part D
As a bacterium approaches a food source, one would expect
As a bacterium approaches a food source, one would expect
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tumbles to become more frequent.
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runs to become more frequent.
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flagella to stop spinning.
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flagella to rotate clockwise more frequently.SubmitHintsMy AnswersGive UpReview Part
Part E
Why are receptors on the cell surface necessary for bacterial movement?
Why are receptors on the cell surface necessary for bacterial movement?
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The receptors actually spin the flagella.
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The receptors physically alter shape to steer the bacterium.
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The bacterium contains receptors that are sensitive to light.
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The receptors sense the stimulus and send signals to the flagella.SubmitHintsMy AnswersGive UpReview
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Pleomorphic bacteria
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Are usually spherical
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Have a slightly curved rod shape
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Are usually spiral
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Vary in shape and size
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None of the above
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The difference between simple diffusion and facilitated diffusion is that facilitated diffusion
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moves materials from a higher to a lower concentration.
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moves materials from a lower to a higher concentration.
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requires ATP.
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requires transporter proteins.
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does not require ATP.
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