Photophores of deep-sea fishes may harbor symbiotic bioluminescent bacteria
Indicate whether the statement is true or false
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Spongiform encephalopathies are
A. associated with abnormal, transmissible, protein in the brain. B. caused by prions. C. chronic, fatal infections of the nervous system. D. Creutzfeldt-Jacob disease, kuru, and Gertsmann-Straussler-Scheinker syndrome. E. All of the choices are correct.
Which of the following is NOT true of the
H5N1 virus? a. It is symptomless in pigs. b. It has a high mortality rate in humans. c. It cannot infect birds. d. It moves poorly from human to human. e. It can move between pigs
When cyclin binds Cdk,
a. the cell transitions from G2 to S. b. kinase activation occurs. c. chromosomes condense. d. the cell quickly enters M phase. e. the cell begins apoptosis.
Bacteriochlorophyll a absorbs ________ light
A) 350 nm, ultraviolet B) 425 nm, violet C) 660 nm, red D) both 425 & 660 nm (violet and red) E) all visible