Which technique can be used to identify a protein of interest after a two-dimensional gel electrophoresis experiment?
A. DNA microarray
B. Treatment with reverse transcriptase to isolate the DNA of interest
C. BLAST analysis
D. Mass spectrometry
D
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How does the RecA protein contribute to the increased expression of SOS genes?
A. RecA protein competes with LexA protein for binding to the operator sequences. B. RecA protein binds to LexA protein bound to the operator, directly lowering the affinity of LexA protein for DNA. C. RecA protein binds to free LexA protein, mediating the self-cleavage of the repressor. D. RecA protein binding to the promoter region recruits RNA polymerase.
The mechanism by which genes are transferred into bacteria via viruses is called
A. ellipsis. B. replica plating. C. transformation. D. transduction. E. conjugation.
In a dihybrid cross, in which both parents are heterozygous for both traits, what is the probability that the offspring will exhibit both of the dominant phenotypes?
A. 1/16. B. 1. C. 6/16. D. 3/16. E. 9/16.
In a dihybrid cross, if the resulting ratios are 1:1:1:1, what are the genotypes of the parents?
A. GgRr x ggrr B. GgRr x GgRr C. GGRR x ggrr D. GG x RR E. Gg x Rr