Apoptosis is defined as:
A) hypoxic cell death.
B) normal cell death.
C) pathologic cell death.
D) premature cell death.
Answer: B) normal cell death.
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Which term best describes the type of membrane protein in the figure?
A) peripheral B) external C) internal D) integral
The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to
A. photosystem I. B. photosystem II. C. the primary electron acceptor. D. the secondary electron center. E. cytochrome.
The end results of alcoholic fermentation are
a. ethanol and carbon dioxide. b. ethanol and oxygen. c. sugar and carbon dioxide. d. sugar and oxygen.
Which hormone is responsible for stimulation of metabolism?
a. growth hormone b. cortisol c. thyroxine d. parathyroid hormone