When considering the initiation of transcription, one often finds consensus sequences located in the region of the DNA where RNA polymerase(s) binds. Which of the following is a common consensus sequence?
A) TTTTAAAA
B) satellite DNAs
C) TATA
D) any trinucleotide repeat
E) GGTTC
C
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Answer the following statements true (T) or false (F)
1. Lactoferrin and transferrin are proteins that bind iron, and therefore deprive pathogens of this essential nutrient. 2. Pyrogenic substances cause the production of pus. 3. Interferons are virus-specific, but are not species-specific. 4. Complement is the name of a single plasma protein that “complements” the actions of the immune system. 5. Eosinophils are much better phagocytes than neutrophils.
Human damage to Earth’s ecosystem and biodiversity will likely decrease the planet’s human:
a. age structure. b. agricultural advancements. c. potential for technological innovation. d. carrying capacity.
Species richness in a community drastically declines after the removal of one species. This species was likely a(n) ____
a. mutualistic species b. indicator species c. pioneer species d. keystone species e. exotic species
Only 20% to 30% of the energy stored in the chemical bonds of gasoline molecules is transformed into
mechanical energy; the other 70% to 80% is dissipated as waste heat. Which statement explains this phenomenon? a. The first law of thermodynamics. b. The second law of thermodynamics. c. When energy is converted from one form to another, some of the energy is converted into heat. d. Both the first and second laws of thermodynamics. e. Both the second law of thermodynamics, as well as the observation that the conversion of energy involves some energy being converted to heat.