Antibodies are classified in the group of chemicals known as
a. immunoglobulins.
b. complement.
c. antigens.
d. histamines.
e. cyclins.
A
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Specific types of lipids assemble into defined areas of a biological membrane referred to as:
A. sphingopatches. B. lipid rafts. C. biomembrane aggregation regions (BARs). D. plaques. E. cholesterol plugs.
Some types of dinoflagellates (single-cell eukaryotes) show a circadian rhythm. They produce light for about 12 hours in the dark (at night) and photosynthesize for about 12 hours in the light (during the day)
Say you took some dinoflagellates at the end of their 12 hours of darkness and put them on a 24-hour light cycle. How would the cells likely respond during the first day of that cycle? A. The cells would photosynthesize for the full 24 hours. B. The cells would photosynthesize for more than 12 hours but less than the full 24 hours. C. The cells would produce light for the full 24 hours. D. The cells would not produce light or photosynthesize.
All the bacterial cells that result from the replication of a single original bacterial organism are said to be a
A. population. B. pure culture. C. lag culture. D. mutant culture.
Mitochondrial disorders are probably very rare because
A) people have many mitochondria, so the healthy ones can substitute for the affected ones. B) the oocytes with harmful mitochondrial mutations do not have sufficient energy to survive. C) they are difficult to diagnose because most physicians have forgotten what mitochondria are. D) they are not inherited from the father.