The protein kinase activity of the receptor tyrosine kinase (RTK) is located ____ region of the protein
a. on the extracellular
b. on the cytoplasmic
c. within the hydrophobic
d. in the nuclear
e. in the inactive
ANSWER: b
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Which of the following elements was NOT
included in the Urey-Miller experiments?
a. oxygen b. methane c. ammonia d. water vapor e. electrical sparks
Identification relies entirely on biochemical test results.
Answer the following statement true (T) or false (F)
Members of the newly discovered class zetaproteobacteria are primarily (autotrophs/heterotrophs/phototrophs).
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about hormones is not true?
A. Hormones are secreted by axons. B. Hormones are targeted to specific organs within the body. C. Hormones are carried by the bloodstream. D. It takes time to deliver hormones to the cells. E. The effects of hormones are long lasting.