Many of the known cancers are a result of ________
A) the genetic instability of the human genome
B) the non-carcinogenic nature of our environment
C) the genetic stability of the human genome
D) exercising regularly
Answer: A
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Which is the correct sequence of events for protein degradation in eukaryotes?
A. ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein directed to proteasome ? protein digested ? amino acids are released and recycled B. ubiquitin binds target protein ? protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled C. protein directed to proteasome ? ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled D. protein directed to proteasome ? protein unfolds and enters proteasome ? ubiquitin binds target protein ? protein digested ? amino acids are released and recycled E. protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? ubiquitin binds target protein ? amino acids are released and recycled
The molluscan shell does not contain the:
a. periostracum. b. prismatic layer. c. narceous layer. d. mantle.
The diffusion of water across a plasma membrane is referred to as
A. active transport. B. osmosis. C. countercurrent flow. D. facilitated diffusion. E. bulk flow.
The change in the developmental fates of
different cell lineages in response to signals from adjacent tissues is a. contact inhibition. b. ooplasmic localization. c. embryonic induction. d. pattern formation. e. all of these.