SAT Question 19b08ead: Answer & Explanation

While researching a topic, a student has taken the following notes:

• Producing the nutrient-rich cyanobacterium L. maxima at industrial scale requires high-quality samples of L. maxima DNA.
• Yirlis Yadeth Pineda-Rodriguez and a team of researchers at the University of Córdoba, Colombia, evaluated the quantity and purity of L. maxima DNA extracted using three different DNA extraction kits.
• CTAB 2X (kit 1) had a DNA yield of 2,134 nanograms per microliter (ng/µL) and a purity ratio of 2.2.
• Pbact (kit 2) had a DNA yield of 157 ng/µL and a purity ratio of 1.6.
• Pplant (kit 3) had a DNA yield of 12.5 ng/µL and a purity ratio of 1.5.
• According to the researchers, Pbact was the most effective because it was the only one with both a sufficiently high yield and a purity rate close to the ideal of 1.8.

Difficulty:Hard

The student wants to emphasize the significance of a similarity between two of the kits. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Due to their insufficient yield or purity, CTAB 2X and Pplant were deemed by the researchers to be less effective than Pbact.

Compared to CTAB 2X, which had a DNA yield of 2,134 ng/µL, both Pbact and Pplant had insufficient yields; Pplant, in particular, was ineffective due to its low yield.

CTAB 2X and Pplant both had a DNA yield above 10 and a purity ratio above 1.4.

With the ideal purity ratio being 1.8, CTAB 2X and Pbact were equal in purity, according to the researchers.

SAT Question 19b08ead: Rhetorical Synthesis answer and explanation

Explanation

Why the other choices are wrong