#Question id: 27486
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 4508
#Unit 3. Fundamental Processes
Statement: In the case of group II introns, the chemistry of splicing and the RNA intermediates produced are the same as those for nuclear pre-mRNA.
Explanations: I. The intron uses an A residue within the branch site to attack the phosphodiester bond at the boundary between its 5’ end and the end of the 5’ exon-that is, at the 5’ splice site. This reaction produces the branched lariat.
II. A second reaction in which the newly freed 3’ -OH of the exon attacks the 3’splice site, releasing the intron as a lariat and fusing the 3’ and 5’ exons.
#Question id: 27154
#Unit 4. Cell Communication and Cell Signaling
Main protease subunit of gamma secretase?
#Question id: 1650
#Unit 4. Cell Communication and Cell Signaling
Recombination of V, D, and J Ig gene segments:
#Question id: 32372
#Unit 2. Cellular Organization