Which condition does not involve a defect in an enzyme pathway?
A) Alkaptonuria
B) Albinism
C) Sickle cell anemia
D) Phenylketonuria (PKU)
C) Sickle cell anemia
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Paramecium is a single-cell eukaryotic organism that can reproduce by mitotic cell division. Prior to the M phase of the cell cycle, which of the following must occur?
A. The cell must replicate its chromosomes. B. The cell must first be fertilized. C. The nucleus must divide. D. Chromatids must be separated. E. The nuclear envelope must disintegrate.
Microscopic fossils are also called microfossils
A. These minerals are needed as cofactors for enzymes needed in photosynthesis. B. These minerals are needed as cofactors for enzymes needed in cellular respiration. C. These skeletons allow for more complex reactions to take place inside the cell. D. These skeletons probably afforded them protection from being eaten. E. These minerals are necessary to maintain genome integrity.
Most of the carbon dioxide in the blood of humans is transported
A. as dissolved CO2 in plasma. B. as bicarbonate ion in plasma. C. attached to hemoglobin in red blood cells. D. attached to hemoglobin in plasma. E. as carbonic acid.
A Venus fly trap’s niche in an ecosystem is as
a ________.
a. producer b. primary consumer c. second-level consumer d. producer and primary consumer e. producer and second-level consumer