Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?
A) synthesis of DNA from an RNA template
B) synthesis of double-stranded RNA from an RNA template
C) synthesis of double-stranded RNA from a DNA template
D) transcription of mRNA from DNA
E) synthesis of DNA from a DNA template
B
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Bicoid protein is a transcription factor that promotes transcription of the hunchback gene. This is an example of:
A. translational control of gene expression during development. B. translational control of development. C. hierarchical control of gene regulation during development. D. maternal developmental effect. E. oocyte polarization.
Newborn humans face thermoregulatory challenges as do small mammals. One mechanism they use to generate heat is
A. nonshivering thermogenesis in "brown fat." B. evaporation in "brown fat." C. radiation in "brown fat." D. convection in "brown fat." E. shivering thermogenesis in "brown fat."
If a forest canopy is dense and closed, the understory and shrub layers tend to be well developed
Indicate whether the statement is true or false
Arrange the following electron carriers in the electron transport chain, based on their standard reduction potentials.Cytochroms a3(Fe3+) + e? ? Cytochrome a3 (Fe2+) Eo (volts) = 0.35Ubiquinone + 2H+ + 2e? ? Ubiquinone H2 Eo (volts) = 0.10Cytochrome a (Fe3+) + e? ? Cytochrome a (Fe2+) Eo (volts) = 0.29Cytochrome c (Fe3+) + e? ? Cytochrome c (Fe2+) Eo (volts) = 0.25
A. cytochrome c - ubiquinone ? cytochrome a ? cytochrome a3 B. cytochrome a3 ? cytochrome a ? cytochrome c ? ubiquinone C. ubiquinone ? cytochrome a ? cytochrome a3 ? cytochrome c D. ubiquinone ? cytochrome c ? cytochrome a ? cytochrome a3