Which of the following is a likely target for a toll-like receptor (TLR)?
A) tumor necrosis factor
B) interleukin IV
C) flagellin
D) insulin
Answer: C
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A weed that exhibits resistance to an herbicide ________.
A. is less likely to pass on the gene to the next generation B. inherited the gene that made it resistant to the herbicide C. developed the resistance in response to the herbicide D. mutated when exposed to the herbicide
Particular receptor tyrosine kinases (RTKs) that promote excessive cell division are found at high levels on various cancer cells. A protein, Herceptin, has been found to bind to an RTK known as HER2. HER2 is sometimes excessive in cancer cells
This information can now be utilized in breast cancer treatment if which of the following is true? A) if HER2, administered by injection, causes cell division B) if the patient's cancer cells have excessive levels of HER2 C) if the patient's genome codes for the HER2 receptor D) if the patient has RTKs only in cancer cells
Which of these statements concerning the functional characteristics of the heart chambers is NOT correct?
A. During ventricular diastole, blood collects in the right and left atria. B. At the very beginning of ventricular diastole, blood flows directly from the atria into the relaxed ventricles. C. 70% of ventricular filling occurs before the atria contract. D. During ventricular systole, the atrioventricular valves close. E. During ventricular diastole, the semilunar valves open.
Which of the following is not a type of mRNA processing?
A. adding a cap B. splicing C. removing the introns D. adding a tail E. cleaving off the methionine