During which cellular process do all three forms of RNA associate?
A. ribosome assembly
B. chromatin formation
C. formation of the nucleolus
D. protein synthesis
D. protein synthesis
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The constituents of the electron transport chain have similar capabilities, with the exception of ubiquinone (coenzyme Q). What is different about ubiquinone?
A) Ubiquinone is a protein that begins the electron transport chain, so it accepts the highest-energy electrons. B) Ubiquinone is a protein that serves as a regulator of the rate of redox reactions in the electron transport chain. C) Ubiquinone is a protein that is a constituent of all cells, prokaryotic or eukaryotic; hence its name, originating from "ubiquitous." D) Ubiquinone is not a protein, is lipid soluble, and can move through the inner mitochondrial membrane.
The ________ is a factor-independent termination site found in the leader region of certain operons, which, under the influence of ribosome behavior, controls the continued transcription of that operon.
A. terminator B. operator C. attenuator D. modulator
A cephalopod's tentacles are modified from its _____
A) mantle B) visceral mass C) foot D) shell E) radula
Electrical signals spread to a(n) ____ zone at the start of an axon. If the electrical signals are sufficiently strong, they are conducted along the axon to its terminal endings
a. input b. trigger c. conducting d. output e. initiation