Which of these method(s) of controlling eukaryotic gene expression is NOT employed in prokaryotic cells?
A. controlling how often a gene is transcribed
B. controlling how an RNA transcript is spliced
C. controlling which mRNAs are exported from the nucleus to the cytosol
D. controlling which mRNAs are translated into protein by the ribosomes
E. controlling how rapidly proteins are destroyed once they are made
B, C
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Cilia and flagella of eukaryotic cells are composed of:
A. microtubules in a 9 + 2 arrangement. B. protein fibers in a helical arrangement. C. actin filaments in a 9 + 2 arrangement. D. nine triplets of microtubules in a circle.
Questions 72–76 refer to the five RNA codons listed below:a
AUG b. UAA c. UUU d. UUA e. AAA D 72. This codon terminates a coding region. D 73. The anticodon AAA pairs with this codon. M 74. A single mutation involving the second letter of codon AUA could convert it to this codon. D 75. A DNA codon of ATT is complementary to this RNA codon. D 76. This codon codes for an amino acid and indicates the beginning of a coding region.
Nitrogen is reduced in four cycles
What will be an ideal response?
Diastolic pressure is a measure of the pressure when ____
a. the left ventricle is relaxing b. the right ventricle is contracting c. blood is flowing rapidly through the aorta d. the SA node is firing e. there is peak flow through the systemic circulation