Butane and isobutane are isomers. This means they have the same:
A) number of carbon atoms but different numbers of hydrogen atoms.
B) arrangement of atoms but a different chemical formula.
C) chemical formula but can only exist as ring structures.
D) chemical formula but a different arrangement of atoms.
Answer: D
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Treatments for genetic disorders currently involve
a. substituting normal for defective parents. b. substituting normal for defective genes. c. supplying a missing gene. d. supplying missing enzymes or gene products. e. all of these EXCEPT substituting normal for defective parents.
The following products diffuse into the lacteal
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One parent carries a dominant allele (AL) that is lethal in early life in homozygotes. The other parent is homozygous for the wild type allele (A+) of the same gene. What is the expected dominant:wild type phenotype ratio for their offspring?
A) 100:0 B) 75:25 C) 50:50 D) 25:75 E) 0:100