What is one goal of the Human Microbiome Project?
A. To sequence the DNA of all microorganisms
B. To study the prevalence of disease
C. To elucidate genetically linked diseases
D. To study microorganisms in an artificial habitat
E. To provide comprehensive characterization of microbiota relating to human health and disease
Answer: E
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Which of the following can control mRNA stability?
A. The stop codon that is used to terminate translation in the mRNA B. AU rich elements in the mRNA C. distance of the stop codon to the polyA tail D. number of A's in polyA tail
Black smokers are rich in ________, while white smokers have high levels of ________
a. iron sulfide; copper sulfide b. copper sulfide; zinc sulfide c. zinc sulfide; copper sulfide d. copper sulfide; iron sulfide
Label the parts of the model animal cell
M 119. _____ components of cytoskeleton M 120. _____ DNA + nucleoplasm M 121. _____ Golgi body M 122. _____ lysosome D 123. _____ microfilaments D 124. _____ microtubules E 125. _____ mitochondrion E 126. _____ nuclear envelope M 127. _____ nucleolus E 128. _____ nucleus M 129. _____ pair of centrioles E 130. _____ plasma membrane M 131. _____ ribosomes M 132. _____ rough ER M 133. _____ smooth ER M 134. _____ vesicle
Griffith's experiment demonstrated transformation because a mouse injected with live R and heat-killed S strains of Streptococcus pneumoniae resulted in death of the mouse and the isolation of live R as well as live S cells. Hypothesize as to the type of cells that Griffith would have observed if transformation had NOT occurred.
A. Griffith would have isolated both live R and heat-killed S cells from the mouse host. B. Griffith would have isolated no cells from the mouse host. C. Griffith would have isolated only live R cells from the mouse host. D. Griffith would have isolated only live S cells from the mouse host.