Which of the following junctions allows for cytoplasm-to-cytoplasm communication between cells?
a. adhesion junctions
b. tight junctions
c. gap junctions
d. None of these are correct.
c. gap junctions
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Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
Which protein has been implicated in the development of Alzheimer's disease?
a. apolipoprotein A b. apolipoprotein M c. apolipoprotein G d. apolipoprotein B e. apolipoprotein E
Four of the five answers listed below are events occurring during mitosis. Select the exception
a. chromosome replication b. division of centromere c. lining chromosomes up at the cellular equator d. spindle microtubules attach to the centromeres e. chromosomes migrate to opposite ends of the cell
Why does extended hypoglycemia (low blood sugar) lead to confusion and difficulty thinking?
A. Glucose provides energy for brain cells. B. Unregulated pH of body fluids causes these symptoms. C. Glucose is major source of energy for non-nervous system cells. D. Glucose is required for chemical reactions in the body.