Malaria is caused by Plasmodium falciparum, a nonmotile protist that contains a cluster of microtubules at one end of the cell. Once injected into the bloodstream, these microtubules are used to attach to red blood cells. In areas of the world where malaria is endemic, people have a relatively high incidence of the allele for
A. sickle cell.
B. cystic fibrosis.
C. blue eyes.
D. hemophilia.
E. mental disabilities.
A. sickle cell.
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If the NMDA receptor is removed
a. long-term potentiation doesn't occur. b. short-term memory is not converted. c. long-term memory occurs but is shortened. d. short-term memory is lengthened. e. long-term potentiation doesn't occur and short-term memory is not converted.
Which disease may produce a malformed
embryo if the mother develops the disease in the first three months of a pregnancy?
a. German measles (rubella) b. chicken pox c. red measles d. hepatitis e. mumps
Homeobox genes
A) encode proteins with a conserved sequence of amino acids. B) are important in development. C) are conserved in multicellular animals. D) are transcription factors. E) All of these
The gene for red-green color vision is on the x-chromosome. Color blindness is caused by a recessive allele. A normal woman (X^N X^N) marries a color-blind man (X^n Y). What fraction of their children will be color-blind?
a. 0/4 b. 1/4 c. 2/4 d. 3/4