The function of the stop- transfer and start-transfer sequence is to make a________ protein
Fill in the blank(s) with the appropriate word(s).
Answer: Transmembrane
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What enzyme links each tRNA molecule to the correct amino acid?
a. tRNA polymerase b. peptidyl transferase c. aminoacyl tRNA synthetase d. 7-methylguanosine
An immunoassay was developed to rapidly diagnose patients infected with an emerging virus. However, the researchers discovered that some individuals were producing false negatives when tested, despite being infected with the virus. What might explain this?
A. Changes in the antibody produced by the virus B. Rapid evolution of the viral antigen C. Changes in the length of the viral DNA D. Number of genome copies carried in each virion
Emerging viruses arise by
a) the spread of existing viruses more widely within their host species. b) mutation of existing viruses. c) the spread of existing viruses to new host species. d) all of the above e) none of the above
Which of the following statements about the mRNA start codon is INCORRECT?
A. The start codon specifies the amino acid methionine. B. The start codon is only a few nucleotides from the ribosomal binding site. C. The start codon defines the reading frame. D. The start codon is usually GGA. E. The start codon is usually AUG.