Which of the following is not a common posttranscriptional modification of tRNA molecules?
A. removal of nucleotides from the 5' and 3' ends
B. methylation and deamination of specific bases
C. addition of a 5' cap
D. attachment of the C-5 of uracil to the ribose at specific sequences
C
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The enhanced selectivity of tandem affinity purification (TAP) is due to:
A. two different tags?calmodulin-binding protein and protein A?that are fused to the protein of interest and allow consecutive rounds of affinity chromatography. B. the presence of a TEV cleavage site in the fusion protein. Cleavage of this site further purifies the protein by cleaving of the protein A tag. C. the fusion of a Gal4p DNA binding domain to the protein along with protein A. These two tags allow for purification of the fusion protein. D. the calmodulin-binding protein tag, which binds strongly to calmodulin. E. All of these choices contribute to the enhanced selectivity.
The process in fungi that allows nutrients to flow from food-absorbing parts of the fungal body to other, nonabsorptive,
parts is referred to as ____.
a. osmosis b. karyogamy c. cytoplasmic streaming d. plasmogamy e. mutual symbiosis
If an organism has 12 chromosomes in its gametes, how many chromosomes would be found in a fertilized cell made by this organism?
a. 12 b. 18 c. 24 d. 36
The cross GE/ge × ge/ge produces the following progeny: GE/ge 404, ge/ge 396, gE/ge 97, Ge/ge 103. From these data, one can conclude that the recombinant progeny are gE/ge and Ge/ge
Indicate whether the statement is true or false