I am having really hard time understanding the key to a few questions in 5R. Could someone kindly clarify it?
Physics
Question 38.
It is asking about about CuCl2 and CuI. The key is D. However I really feel C is the right one.
Physics
Question 39
The key is CdCl3. How could it not be CdCl2?
Biology
Question 141
I choose D instead of A. In the passage it talks about "circulating lypmphocytes". My understanding is the lymphocytes are circulating for the clonal deletion. Choice A says corneal protein doesn't enter circulation. I don't think most of the cell proteins enter circulation after all(I might be wrong). If that's a problem for clonal deletion, does it mean most of the cell proteins would have similar problem? That's sounds awefully inefficient. That's why I didn't choose A.
Based on the same thinking, for 145, I choose B. Since lymphocytes are circulating, I would think bloodstream and lymph nodes are the places where clonal deletion happens.
Biology
Question 158
It is asking rRNA in the passage. The key is nonlinear. However I feel self-replicating makes more sense.
Biology
Question 216
I thought it is 6500. Yet the key is 650.
Physics
Question 38.
It is asking about about CuCl2 and CuI. The key is D. However I really feel C is the right one.
Physics
Question 39
The key is CdCl3. How could it not be CdCl2?
Biology
Question 141
I choose D instead of A. In the passage it talks about "circulating lypmphocytes". My understanding is the lymphocytes are circulating for the clonal deletion. Choice A says corneal protein doesn't enter circulation. I don't think most of the cell proteins enter circulation after all(I might be wrong). If that's a problem for clonal deletion, does it mean most of the cell proteins would have similar problem? That's sounds awefully inefficient. That's why I didn't choose A.
Based on the same thinking, for 145, I choose B. Since lymphocytes are circulating, I would think bloodstream and lymph nodes are the places where clonal deletion happens.
Biology
Question 158
It is asking rRNA in the passage. The key is nonlinear. However I feel self-replicating makes more sense.
Biology
Question 216
I thought it is 6500. Yet the key is 650.