SAT Practice Test 1- 22-31

In the second paragraph (lines 12-19), what do the authors claim to be a feature of ...?

A student claims that nitrogenous bases pair randomly with one another.

The authors’ main purpose of including the information about X-ray evidence and density is to

Based on the passage, the authors’ statement “If a pair consisted of two purines, for example..

Based on the table and passage, which choice gives the correct percentages of the ...?

The authors’ use of the words “exact,” “specific,” and “complement” ...?

The authors use the word “backbone” in lines 3 and 39 to indicate that