Which of the following direct energy transfers is impossible in living systems?
A) light energy to chemical energy
B) chemical energy to kinetic energy
C) light energy to potential energy
D) heat to light energy
Answer: D
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Plastoquinol transfers electrons from
A) cytochrome b6/f complex to coenzyme Q. B) photosystem II to photosystem I. C) water to photosystem II. D) light harvesting complex II to photosystem II. E) cytochrome b6/f to plastiquinone
Where would you expect to find telomerase activity?
A) At the end of a chromosome in a normal healthy eukaryotic body (somatic) cell. B) At the end of a chromosome in a cancerous eukaryotic body cell. C) On the leading strand of DNA in a normal bacterial cell. D) On the lagging strand of DNA in a normal bacterial cell. E) At the centromere of a chromosome in a healthy eukaryotic reproductive cell.
The pancreatic hormones regulate levels of __________ in the blood.
A. oxygen B. insulin C. glucose D.glycogen
Cells of the second line of defense called ________ recognize and kill virus-infected cells
A) basophils B) eosinophils C) macrophages D) NK cells E) dendritic cells