Biology > 2005 > 20
JAMB UTME
A test tube containing yeast in glucose solution was suspended in a covered conical flask containing alkaline pyrogallol. The bubbles of carbon (IV) oxide produced indicate that the yeast cells are
A.
respiring in the absence of oxygen
B.
liberating oxygen on their own
C.
living and consuming oxygen
D.
being killed by the alcohol produced
Answer: A
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