Which of the following is not a component of the mating-type switch mechanism?
A. HO nuclease
B. Rad51
C. synthesis-dependent strand annealing (SDSA)
D. RecA
E. HML?
D
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How do modified and unmodified histone subunits become distributed among nucleosomes after replication?
A. The newly synthesized DNA strand contains unmodified histone subunits, while the old strand retains the modified histones. B. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A histones, followed by mixtures of H2B, H3, and, finally, H4. C. Both strands of DNA are repopulated first with a mixture of modified and unmodified H2A and H2B histones, followed by mixtures of H3 and finally mixtures of H4. D. Both strands of DNA retain H3-H4 modified pairs, and then are repopulated with unmodified H3-H4 pairs, followed by modified and unmodified H2A-H2B. E. Both strands of DNA retain H2A-H2B modified pairs, and are then repopulated with unmodified H2A-H2B pairs and then mixtures of modified and unmodified H3-H4 pairs.
The atrioventricular valves are supported by connective tissue strands called ________, which prevent the valves from everting
Fill in the blank(s) with correct word
Who were the first hominins thought to wear clothing, build fires, and live in caves or shelters?
a. Homo habilis b. Homo sapiens c. Homo erectus
d. Homo eragaster e. Homo neanderthalensis
If you identify a plant as Magnolia grandiflora, you therefore conclude that this plant is:
a. the nearest living relative of all angiosperms. b. a core angiosperm. c. a monocot. d. a eudicot. e. a dicot.