In 1928, Frederick Griffith's experiments with Streptococcus pneumoniae suggested that
A) bacteria do not incorporate the DNA of other bacteria.
B) attenuated R (rough) bacteria easily revert to the wild type (virulent).
C) DNA was conclusively the molecule of heredity.
D) heat-killed bacteria could somehow "transform" live bacteria.
E) all of the above
D) heat-killed bacteria could somehow "transform" live bacteria.
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Currently in the United States, approximately ________ couples have difficulty in conceiving or giving birth to children.
A) 1 in 6 B) 1 in 30 C) 1 in 100 D) 1 in 200
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
A. To separate the ATP from the ADP. B. To generate and maintain the proton gradient essential for ATP production. C. Because NADH cannot localize to the mitochondrial matrix. D. Because electrons cannot float in the matrix.
Which can be absorbed in the large intestine
A. some amino acid B. vitamin k C. vitamin d D. calcium E. bile
Please match the viral diagnostic method to its description.
Used to specifically amplify viral nucleic acid sequences that can then be detected using probes A) PCR B) Immunological testing C) Electron microscopy D) Cell and tissue culture techniques E) Observation of the patient