[Video] Q30: The most likely purpose of the parenthetical information in lines 63-64 is to

Explanation for Question 30 From the Reading Section on the Official Sat Practice Test 4

Question 30 says the most likely purpose of the parents' medical information in line 2 63 through 64 is to what? So let's look back in the passage and 3 see what the information in these parentheses is. 4 Giving us the sentence it's contained in says the researchers pair the antithrombin gene 5 with the promoter, which is a sequence of DNA that controls gene activity that 6 is normally active in the goats, mammary glands during milk production. 7 So the information in these parentheses is giving us 8 what a promoter is, which it's a sequence of DNA that controls 9 gene activity. So these parents medical information is telling us 10 what a promoter is. Exactly. 11 Scientifically, things like that. So let's look at the answer choices here. 12 We can see pretty easily that answer choice D defining a term is the 13 correct answer here. And that term would be promoter, 14 but let's talk about the other answer choices and why they would be incorrect. 15 So answer choice a says to illustrate an abstract concept. 16 So answer choice a is going to be incorrect because of this word, 17 abstract, a promoter is a very concrete concept in scientific terms. 18 It is concretely a sequence of DNA that can be found in cells. 19 So it's not abstract. If we look at answer choice B, 20 it says to describe a new hypothesis. 21 So a hypothesis is a prediction. 22 This is not a prediction. This is telling us what a promoter is. 23 It's not predicting anything about the promoter or anything like tha...