Which of the following is a synthetic protein produced from engineered DNA that is used to determine whether cytosolic calcium fluxes are associated with signal transduction in a particular cell type?

A) sildenafil
B) ionomycin
C) A23187
D) fura-2
E) a cameleons


Answer: E

Biology & Microbiology

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In the context of the scientific method, the words theory and hypothesis can be used interchangeably

A. true B. false

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Which of the following statements about methyl-directed mismatch repair systems is FALSE?

A. Methyl-directed mismatch repair systems require the concerted actions of several proteins. B. Methyl-directed mismatch repair systems require exonucleases. C. Methyl-directed mismatch repair systems are most often used to correct pyrimidine dimers. D. Methyl-directed mismatch repair systems exist in all species. E. Methyl-directed mismatch repair systems require incorrectly matched base pairs in the DNA.

Biology & Microbiology

How often must the competency of laboratory staff be evaluated

A. After 6 months of employment and annually thereafter B. Anually C. Every three months for the 1st year and anually thereafter D. in the first three months after hire

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The mitochondria of a eukaryotic cell is the site of

a. photosynthesis b. fatty acid metabolism c. cellular respiration d. protein synthesis

Biology & Microbiology