Q1. An older woman complains of shortness of breath and intermittent fainting spells. Her doctor runs a variety of tests and finds that the AV node is not functioning properly. What is the suggested action?

Q2. Suppose you have a light chain genome with 64V regions and 8J regions. If you had repeated attempts at recombination, how many dissimilar attempts would be made when the middle region of both V and J is the segment chosen at each recombination?