Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause

Microorganisms and Disease
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause

cleavage of rRNA that results in disruption of ribosome function

ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP

ADP ribosylation of guanylate cyclase that stimulates production of cGMP

ADP ribosylation of adenylate cyclase that stops production of cAMP

cleavage of rRNA that results in disruption of ribosome function

ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP

ADP ribosylation of guanylate cyclase that stimulates production of cGMP

ADP ribosylation of adenylate cyclase that stops production of cAMP

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Microorganisms and Disease
Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?

Diphtheria toxin and edema toxin are ADP ribosylating toxins

Both organisms cause skin and respiratory tract infections

The most serious disease symptoms are the direct result of toxin action

Both organisms are gram-positive spore formers

Diphtheria toxin and edema toxin are ADP ribosylating toxins

Both organisms cause skin and respiratory tract infections

The most serious disease symptoms are the direct result of toxin action

Both organisms are gram-positive spore formers

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Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

facilitating the growth of normal flora

sequestering Iron

blocking sebum production

lowering the pH

facilitating the growth of normal flora

sequestering Iron

blocking sebum production

lowering the pH

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Microorganisms and Disease
Both Mycobacterium tuberculosis and Streptococcus pneumoniae

are acquired by inhalation

have polysaccharide capsules

stay in the lung and rarely, if ever, enter the bloodstream

have cell walls that contain a high content of mycolic acids

are acquired by inhalation

have polysaccharide capsules

stay in the lung and rarely, if ever, enter the bloodstream

have cell walls that contain a high content of mycolic acids

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Microorganisms and Disease
Mucus helps in protecting against pathogens by

blocking access and attachment of pathogens to mucosal surfaces

sequestering Iron

lowering the pH

facilitating the growth of normal flora

blocking access and attachment of pathogens to mucosal surfaces

sequestering Iron

lowering the pH

facilitating the growth of normal flora

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Microorganisms and Disease
Pseudomembraneous colitis is

caused by a gram-positive bacterium

All of these

caused by a spore-forming bacterium

precipitated by the use of certain antibiotics

caused by a gram-positive bacterium

All of these

caused by a spore-forming bacterium

precipitated by the use of certain antibiotics

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Microorganisms and Disease

Microorganisms and Disease Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause

Microorganisms and Disease Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?

Microorganisms and Disease Lactoferrin helps to protect against pathogens by

Microorganisms and Disease Both Mycobacterium tuberculosis and Streptococcus pneumoniae

Microorganisms and Disease Mucus helps in protecting against pathogens by

Microorganisms and Disease Pseudomembraneous colitis is

Microorganisms and Disease
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause

Microorganisms and Disease
Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?

Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

Microorganisms and Disease
Both Mycobacterium tuberculosis and Streptococcus pneumoniae

Microorganisms and Disease
Mucus helps in protecting against pathogens by

Microorganisms and Disease
Pseudomembraneous colitis is