A researcher wants to determine if a unicellular organism he discovered is an autotroph or a heterotroph
He radioactively labels the carbon in CO2 and C6H12O6, and exposes one
culture of his organism to the labeled CO2 and another culture to the labeled C6H12O6.
What would happen if his organism is an autotroph?
A. Labeled carbon would be seen in the
carbohydrates of CO2-exposed organisms.
B. Labeled carbon would be seen in the
carbohydrates of C6H12O6-exposed
organisms.
C. Labeled carbon would not be seen in the
carbohydrates of either culture.
D. Labeled carbon would be seen in
carbohydrates of both cultures.
A
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