When we have increased CRY1 levels, we have decreased XPA levels. repressing transcription of the XPA-encoding gene.This is a better answer than answer choices A and B, however, replication has more to do with synthesis of DNA and not the protein expression we’re seeing. repressing replication of the XPA-encoding gene.
We see a decrease in XPA levels as CRY1 levels increase. This is going to be similar to answer choice A. activating translation of XPA-encoding transcripts.When we have increased CRY1 levels, we actually see a decrease in XPA levels. This is the opposite of what we see in Figure 1. What this likely means is CRY1 represses the expression of the XPA-encoding gene. As CRY1 levels increase, we have a decrease in XPA levels. We can see the two are inversely related. We have Figure 1 above which shows relative levels of XPA and CRY1 proteins. Ideally you get to the point where you don’t have to flip back to the passage for every question, unless you’re looking for a specific detail or quantitative value. One thing I want you to note is the test-maker says “information in the passage suggests.” For a question like this, that doesn’t automatically mean go back to the passage. 1) To answer this question, we’ll go back to the passage and look at Figure 1 that shows us CRY1 and XPA levels.
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