Nucleobase Concentrations from Murchison Meteorite and Soll Samples
in Parts per Billion
Nocleobase
koguanint
Partne
Xanthine
Adenine
Hypoxanthine
Murchison meteorite
sample 1
0.5
0.2
39
15
24
Murchilson meteorite
sample 2
0.04
0.02
3
Murchison soll
sample
not detected
not detected
Choose 1 answer:
Employing high-performance liquid chromatography-a process that uses
pressurized water to separate material into its component molecules-
astrochemist Yashiro Oba and colleagues analyzed two samples of the
Murchison meteorite that landed in Australia as well as soll from the
landing zone of the meteorite to determine the concentrations of various
organic molecules. By comparing the relative concentrations of types of
molecules known as nucleobases in the Murchison meteorite with those in
the soll, the team concluded that there is evidence that the nucleobases in
the Murchison meteorite formed in space and are not the result of
contamination on Earth.
1
40
2
Which choice best describes data from the table that support the team's
conclusion?
Adenine and xanthine were detected in both of the meteorite
samples and in the soil sample.
INCORRECT SALECTED
Isoguanine and hypoxanthine were detected in the Murchison
meteorite sample 1 but not in sample 2.
This choice misreads the table. Both koguanine and hypoxanthine were
detected in both Murchison meteorite samples
Isoguanine and purine were detected in both meteorite samples
but not in the soll sample.
Hypoxanthine and purine were detected in both the Murchison
meteorite sample 2 and in the soil sample.