Which type of genes guide the formation of
specific body parts?
a. homeotic
b. homologous
c. recessive
d. dominant
e. homozygotic
A
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Which statement makes a prediction for the hypothesis "bird species have decreased in number in a particular wetland due to construction traffic"?
A) If a wetland area is disturbed by construction vehicles, then the number of bird species will decrease. B) If construction vehicles are in a wetland, then the birds will become too frightened to reproduce. C) If bird numbers decrease in a wetland, then construction vehicles must have polluted the environment. D) If construction vehicles enter a wetland, then new predators will arrive and reduce the bird populations.
Which is false regarding the two-component regulatory system in bacteria?
A. One part of the system is exposed to the external cellular environment while another part is exposed to the cytoplasm. B. The system involves a sensor kinase and a response regulator. C. The sensor kinase is phosphorylated by the response regulator when the extracellular environment changes. D. Regulation of OmpF and OmpC porin proteins in E. coli is modulated by this type of system.
What kind of bond is at the arrow in Figure 2.4?
a. Disulfide bridge b. Double covalent bond c. Hydrogen bond d. Ionic bond e. Peptide bond
Which statement regarding transport is false?
a. Active transport is the movement of molecules from areas of high concentration to areas of low concentration. b. ABC transporters consist of a substrate-binding protein, a transmembrane transporter, and an ATP-hydrolyzing protein. c. Simple transport, group translocation, and ABC transport systems all require energy. d. Proton motive force, ATP, or another energy-rich compound can be used to provide the energy required for active transport.