Long-term potentiation involves a long-lasting decrease in the strength of synaptic connections
____________________ Indicate whether the statement is true or false.
F, increase
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Genes whose expression (or abnormal expression) causes cancer are called
A. carcinogens. B. oncogenes. C. cancer genes. D. progenes.
In conjugation the donor cell is recognized by the presence of
A. an F plasmid. B. a Y chromosome. C. diploid chromosomes. D. an SOS response. E. an F plasmid AND diploid chromosomes.
Which statement accurately describes global gene regulation in bacteria?
A) Sigma factors are not involved in gene regulation, only in attachment of the polymerase to the promoter. B) Alternative sigma factors that recognize different promoters are a mechanism of global gene regulation. C) E. coli cells devote more energy to the production of ribosomes during stress so that global gene regulation can occur. D) All promoters are recognized by all sigma factors.
Stomata
a. are found in the root cells. b. may be found scattered anywhere throughout the plant. c. allow the movement of gases into and out of plants. d. cause the excessive loss of water from plants. e. are more numerous on the upper surface of most leaves than on the lower surface.