Answer Choices
confirm that the nucleotide sequences are known for most molecules of DNA.
counter the claim that the sequences of bases along a chain can occur in any order.
support the claim that the phosphate-sugar backbone of the authors’ model is completely regular.
emphasize how one chain of DNA may serve as a template to be copied during DNA replication.
Explanation for Question 27 From the Reading Section on the Official Sat Practice Test 1
Okay, so number 27 is gonna make us go back into the passage because 2 it's referencing a specific line item. 3 This is the authors, use the words, exact specific and compliment in lines, 4 47, 3 49 to do what mainly to do what? 5 So let's go back to when it's 47 49 I'll let's 6 highlight those words, compliments specific exact. 7 Okay. And remember, 8 this whole paragraph is talking about how bases, 9 um, are able to like how, 10 how the DNA is able to replicate itself, 11 right? So let's just like start here. 12 The fall state took her back. One of our model is clearly regular, 13 but any series of the pairs of basis compared to the structure, it follows 14 that in a long molecule, many different permutations are possible. 15 And therefore seems likely at the precise sequence of basis in the code is 16 the code, which carries the genetic information. So the sequence of the basis is 17 going to be what determines the genetical information. 18 If the actual order of the base is on one of the pair of 19 chains were given one could write down the exact order of 20 the basis on the other one, because they're paired the 21 specific period pairing thus one chain. 22 And this is going to be the reason why this, 23 this is important, right? Thus one chain is as it were the complement 24 of the other. It is this feature. 25 This feature is what suggests how the molecules duplicate itself. 26 So we're using the word exact specific and compliment to show how that feature 27 allows the ...