Which statements is false concerning the binding of o2, co2 and/or protons to hemoglobin?
a. the high pka of the c-terminal h creates a salt bridge to a d residue in the b-subunits and stabilizes the deoxy form of hb
b. o2 and co2 bind to the fe of the heme group, but o2 is stabilized by the distal h residue and co2 is not
c. protons bind to several amino acids in the hb molecule
d. the n-terminal of the hb chains transport carbon dioxide
e. oxygen binding causes the fe to move into the porphyrin plane resulting in movement at the a1b2 and a2b1 interfaces

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.