Which of the following statements is true and provides evidence that a certain component of the ribosome catalyzes protein synthesis?
a. Ribosomes are inactive after protease digestion.
b. Ribosomes are inactive after RNase digestion.
c. Structural analysis shows that proteins occupy the catalytic site where peptide bonds are formed.
d. Structural analysis shows that mRNA occupies the catalytic site where peptide bonds are formed.
Ans: b. Ribosomes are inactive after RNase digestion.
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The killing of cells by UV irradiation involves
A) absorption at 260 nm by proteins only. B) absorption at 260 nm by RNA only. C) formation of pyrimidine dimers. D) formation of purine dimers.
Protists do not constitute a kingdom because they do not share a unique common ancestor
Indicate whether the statement is true or false.
In terms of overall methylation, what is the most accurate way to describe the genomes of cancer cells?
A) Cancer cells have an overall hypomethylated genome compared to healthy cells. B) Cancer cells have equivalent methylated genomes compared to healthy cells. C) A few types of cancers are have hypomethylated genomes, but it is not common in most types of cancers. D) Cancer cells have an overall hypermethylated genome compared to healthy cells. E) A few types of cancers are have hypermethylated genomes, but it is not common in most types of cancers.
Use the following dataset to answer the following question.NameMonthCommissionTenureTravel ExpenseSophie Castro1$48,0004 years$11,000Travis Turner1$53,0007 years$21,000Elias Hansen2$67,00010 years$7,000Amanda Garza2$72,0008 years$14,000What type of dataset is this?
A. Panel B. Pooled cross-section C. Cross-sectional D. Time series