The activation/inactivation of G proteins occurs as a result of
What will be an ideal response?
GDP/GTP exchange and GTP hydrolysis.
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A gap junction is a channel that connects adjacent cells. Which one of the following cannot pass through a gap junction?
A) ions that can regulate heartbeat B) amino acids C) nucleotides D) ribosomes
The border across which genes can flow between two populations is called the
a. contact zone. b. parapatric zone. c. zone of speciation. d. demilitarized zone. e. zone of polyploidy.
Which event occurs during the elongation stage?
a. Peptide bonds form. b. Free amino acids bind to the mRNA binding site. c. Anticodons bind to complementary codons. d. A STOP codon enters the ribosome. e. Peptide bonds form, and anticodons bind to complementary codons.
You identify a molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. What kind of molecule is it?
A) protein B) carbohydrate C) nucleic acid D) lipid