In a liver cell detoxifying alcohol and some other poisons, the enzymes of the peroxisome remove hydrogen from these molecules and _____
A) combine the hydrogen with water molecules to generate hydrogen peroxide
B) use the hydrogen to break down hydrogen peroxide
C) transfer the hydrogen to the mitochondria
D) transfer the hydrogen to oxygen molecules to generate hydrogen peroxide
D
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Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
A) 4 B) 8 C) 16 D) 32 E) 64
Which of the following groups of animals is found in the same environment, and has similar heat storage adaptations, as cheetahs?
A. Gazelles B. Rhinos C. Giraffes D. Elephants E. Hyenas
The refractory period of a neuronal plasma membrane is important because it ____
a. establishes the resting potential b. initiates an action potential c. ensures that the threshold potential will be reached d. ensures that an impulse will travel in a one-way direction e. resets the threshold potential
Bacterial electron transport chains may be comprised of fewer components and have lower phosphate to oxygen (P/O) ratios than mitochondrial transport chains.
Answer the following statement true (T) or false (F)