Which of the following best illustrates the Bohr effect?
a. The amount of a gas that diffuses across a membrane depends on the differences in the
gas' partial pressure.
b. The ability of hemoglobin to bind oxygen depends on the partial pressure of oxygen.
c. In a mixture of gases, the total pressure of the mixture is the sum of the pressures of the
individual gases.
d. pH causes a displacement of the oxygen-hemoglobin dissociation curve.
e. As the concentration of chloride ions increases, the ability of hemoglobin to bind carbon
dioxide decreases
D
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Microbial death rates may be affected by
A. pH. B. temperature. C. the presence of organics. D. All of the choices are correct.
In animals, the evolutionary development of cephalization is most associated with
a. bilateral symmetry. b. radial symmetry. c. ganglia. d. nerve nets. e. nerves.
Huntington's disease, an often fatal disease of the central nervous system, is inherited from a dominant allele. Furthermore, a person may not show symptoms of the disease until 30 – 50 years of age. Jack and Jill have been married for 40 years and have two children, Joe and Jane. Jack has recently been diagnosed with Huntington's disease. Assuming that Jane does not have the disease, determine
the probability that one of the children will eventually have Huntington's. What is the probability that both Joe and Jane will inherit the disease? Text section: LO2 Key Concept: dominant inheritance Level: Application of concepts What will be an ideal response?
Thymine dimers
A. form when DNA is exposed to carcinogens such as tobacco smoke. B. result in abnormal protein structure which causes red blood cells to sickle. C. are rarely removed by DNA repair enzymes. D. form when DNA is exposed to UV radiation.