In Griffith's experiments with Streptococcus pneumoniae, rough nonencapsulated streptococci were converted into smooth encapsulated streptococci in the presence of the heat-killed smooth encapsulated streptococci. Which microbial process had Griffith identified?
A. Transformation
B. Transduction
C. Conjugation
D. Cloning
Answer: A
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A. heterotrophs. B. chemoheterotrophs. C. autotrophs. D. chemolithoautotrophs.
Which tissue type includes fat and blood?
A) muscle B) connective C) epithelial D) nervous
"Immediate early genes" such as myc can best be thought of as genes that
a) Are only expressed in the absence of growth factor (GF) stimulation b) Become permanently switched off during tumorigenesis c) Code for GF receptors such as RTKs d) Represent the first wave of expression following GF stimulation
In early spring 2009, the CDC reported several dozen cases of novel H1N1 influenza ("swine flu") in the United States. By the summer, the number of confirmed cases was reported as over 40,000. The pattern of novel H1N1 cases in the United States represents a(n) ________ disease
A) epidemic B) endemic C) sporadic D) pandemic E) opportunistic