The ability of the adaptive immune response to
tailor its response to a particular antigen is
referred to as
a. diversity.
b. memory.
c. specificity.
d. inflammation.
e. self-recognition
C
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Imagine that you are a medical student working in a cancer research laboratory. Your boss has given you samples of cancer cells and blood from a patient
She has told you that the cells have no mutations in any of their signaling molecule proteins (i.e., all the proteins are normal), but the cells' signaling transduction properties are not normal, causing them to be cancerous. Which of the following could account for the increased cell proliferation in the patient? A. The cells taken from the patient have more growth factor receptors than normal. B. The concentration of a signaling molecule in the patient is higher in the patient than usual. C. The cells taken from the patient exhibit a reduced level of signal amplification. D. Both A and B. E. A, B, and C.
True or False. A Punnett square can be used to interpret the results of a testcross
A. true B. false
Cell membranes consist mainly of a _____
a. carbohydrate bilayer and proteins c. lipid bilayer and proteins b. protein bilayer and phospholipids
Chemical mutagens often act by altering the
A. alkyl groups of the nucleobase. B. nucleobase sequence. C. number of binding sites on the nucleobase. D. hydrogen bonding properties of the nucleobase.