Mice That Lack the Gene That Normally Produces the Protein

Multiple Choice

Mice that lack the gene that normally produces the protein leptin become very obese.Which of the following statements is the best interpretation of this phenomenon?

A) The leptin gene is probably responsible for our current obesity epidemic.
B) Leptin plays an important role in the regulation of appetite.
C) The leptin gene appears to be a gene for obesity.
D) This experiment does not provide enough information for drawing conclusions.