When a promoter is methylated, gene expression is:
a. silenced.
b. enhanced.
c. slowed.
d. maintained.
e. activated.
a
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In bacteria, which topoisomerase is responsible for unlinking catenated chromosomes after replication?
A. topoisomerase I B. topoisomerase II C. topoisomerase III D. topoisomerase IV E. topoisomerase V
The first wildlife refuges were established in the United States shortly after 1960.
a. true b. false
The net ATP yield (at letter "D") from the metabolism of one glucose molecule is
a. 32. b. 4. c. 36. d. 64. e. 28.
In fruit flies, red eyes (pr+_) are dominant to purple eyes (prpr) and normal wings (vg+_) are dominant to vestigial wings (vgvg). The genes are located on the same chromosome
A purebreeding red-eyed fly with vestigial wings was crossed with a pure-breeding purple-eyed fly with normal wings. All of the F1 progeny had a WT phenotype. Which of the following represents the arrangement of alleles on the F1's chromosome? A) prvg/pr+vg+ B) pr+vg/prvg+ C) prpr+/vgvg+ D) prvg/prvg E) pr+vg+/pr+vg+