Many proto-oncogenes encode
a. extracellular receptors.
b. intracellular receptors.
c. tumor suppressor proteins.
d. protein kinases.
e. extracellular receptors and protein kinases.
E
Biology & Microbiology
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Within an ecosystem, plants are known as producers or ____
a. heterotrophs b. consumers c. “other feeders” d. decomposers e. autotrophs
Biology & Microbiology
The 21st and 22nd amino acids found in proteins are the rare amino acids ________ and ________
Fill in the blank with correct word.
Biology & Microbiology
The first multicellular organisms probably arose about
A. 1.2 billion years ago. B. 500 million years ago. C. two billion years ago. D. 3.5 billion years ago. E. six billion years ago.
Biology & Microbiology
______________ is secreted by the pancrease to neutralize acid in chyme
A. hydrochloric acid B. bile C. chymotryosin D. insulin E. bicarbonate
Biology & Microbiology