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Suppose that an enzyme uses a catalytic mechanism in which a functional group on the enzyme has to accept a proton from the intermediate formed in the first chemical step. The pKa of that basic functional group on the enzyme is 8.0, and is the only pKa apparent on a […]

Question: Blue skin color in smurfs is controlled by two independent biochemical pathways (1 and 2). Pathway 1 has two enzymatic steps under the control of genes A and B respectively. The homozygous recessive state aa or bb blocks the formation of blue pigmentation by this pathway. Pathway 2 has one […]

1) A molecule which is lacking in lungs of the premature infant is the ______.  It functions to help to keep alveoli from collapsing.  Positive pressure equipment is necessary in such a situation. 2) Large folds in the stomach known ______ increase its surface area and also enable it to […]

In a donor population, the allele frequencies for the normal (HbA) and the sickle-cell allele (HbS) are 0.9 and 0.1 respectively. A group of 55- individuals migrates to a new population containing 10,000 individuals; in the recipient population, the allele frequencies are HbA = 0.99 and HbS = 0.01. a. […]