Why does the activation of a protein kinase that acts on initiation factor eIF2 block protein synthesis?
a) Phosphorylated eIF2 denatures.
b) Phosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation.
c) Dephosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation.
d) Phosphorylated eIF2 is hyperactivated, blocking further translation.
e) Phosphorylated eIF2 cannot exchange its GTP for GDP, which is required for eIF2 to participate in another round of translation initiation.
Ans: b) Phosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation.
You might also like to view...
You find a multi-legged animal in your garden and want to determine if it is a centipede or a millipede
You take the animal to a university where a myriapodologist quickly tells you that you have found a centipede. Which of the following may have allowed her to make this distinction? A) segmentation B) poisonous fangs C) the total number of legs D) egg-laying E) molting
For glycolysis to occur,
a. glucose must enter the mitochondria. b. there must be an input of energy from ATP. c. oxygen must be available. d. ATP syntase must be activated. e. heat must be supplied
What would you expect to find bound to the stop codon at the A site?
A) a charged tRNA with the anticodon TAG B) a charged tRNA with the anticodon ATC C) an uncharged tRNA D) a release factor E) Nothing binds to a stop codon, which is why the peptide is released.
Use the basic steps of the scientific method to describe Pasteur's experiments to investigate spontaneous generation
What will be an ideal response?