Small RNAs that regulate translation by binding to the leader region of mRNAs are called antisense RNAs.
Answer the following statement true (T) or false (F)
True
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Which of the following mutations is most likely to cause a phenotypic change?
A) a duplication of all or most introns B) a large inversion whose ends are each in the same region between genes C) a nucleotide substitution in an exon coding for a transmembrane domain D) a single nucleotide deletion in an exon coding for an active site E) a frameshift mutation one codon away from the end of the nontemplate strand
Which of the following statements about ubiquitin is TRUE?
A. Ubiquitin recognizes improperly folded proteins. B. Ubiquitin targets proteins for degradation. C. Ubiquitin targets proteins for post-translational processing. D. Ubiquitin recognizes improperly folded proteins and targets them for degradation. E. Ubiquitin targets proteins for degradation and post-translational processing.
Some bacterial transposons, known as Tn elements, are larger than insertion sequences (IS elements) and contain protein-coding genes that have human health significance. What might such a bacterial transposon contain?
A) proto-oncogene B) dissociation element C) pseudogene D) drug resistance E) oncogene
The smallest branches of the respiratory tree are the:a
pharynx. b. tracheae. c. bronchial tubes. d. bronchioles. e. bronchi.