A urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 5,000 bacteria, with a generation time of 30 minutes, sits for 3 hours before finally being assayed. How many bacteria will then be present within the sample?

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#Question id: 1921

#Unit 4. Cell Communication and Cell Signaling

In Burkitt's lymphoma, a vaccine against which of the following might prove useful?

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#Question id: 1922

#Unit 4. Cell Communication and Cell Signaling

A B-cell lymphoma will express a unique tumor antigen called:

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#Question id: 1923

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a diagnostic marker for tumors of the colon?

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#Question id: 1924

#Unit 4. Cell Communication and Cell Signaling

Antigens normally expressed only on embryonic cells but also sometimes found on tumors are known as:

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#Question id: 1925

#Unit 4. Cell Communication and Cell Signaling

 CD44 is a molecule that can be involved in:

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#Question id: 1926

#Unit 4. Cell Communication and Cell Signaling

The normal immunological control of tumors is referred to as: