Phosphorylation is an example of which of the following types of control over gene expression?
a. post-transcriptional modification
b. post-translational modification
c. translational control
d. transcriptional regulation
b
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Lung cancer is associated with changes in chloride and water movement into and out of exocrine glands, dry and thickened mucus in the airways, and an increase in the incidence of respiratory infections
1.True 2.False
Introns are known to contain termination codons (UAA, UGA, or UAG), yet these codons do not interrupt the coding of a particular protein. Why?
A) More than one termination codon is needed to stop translation. B) Introns are removed from mRNA before translation. C) UAA, UGA, and UAG are initiator codons, not termination codons. D) Exons are spliced out of mRNA before translation. E) These triplets cause frameshift mutations, but not termination.
A(n) ________ is a bacterial virus which is integrated into the host cell DNA
A) lytic phage B) prophage C) plasmid D) transposon E) insertion phage
Aquaporins are proteins that facilitate the transport of __________ across the membrane.
Fill in the blank(s) with the appropriate word(s)