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Lactose Intolerance in Humans Is the Inability to Digest a Specific

question 22

Multiple Choice

Lactose intolerance in humans is the inability to digest a specific sugar found in milk and some milk-derived dairy products. This milk sugar is called lactose, and it is broken down into two simple sugars, glucose and galactose, by the enzyme lactase. Symptoms of this disease, which occur after a person consumes significant amounts of lactose, include abdominal bloating and cramps as well as diarrhea and nausea. Many mammalian species become lactose intolerant shortly after weaning. At this time, the gene that produces lactase becomes inactive so that the enzyme is no longer produced. However, some human populations (approximately 25 percent of all adults) have developed lactase persistence, in which lactase is continually produced throughout adulthood. Which organelle is involved directly with lactase production?

Definitions:

Additive Strategy

A decision-making approach in which each alternative is rated on each of the important factors affecting the decision and the alternative with the highest overall rating is chosen.

Analogy Heuristic

A rule of thumb that applies a solution that solved a problem in the past to a current problem that shares many features with the past problem.

Algorithm

A systematic, step-by-step procedure, such as a mathematical formula, that guarantees a solution to a problem of a certain type if applied appropriately and executed properly.

Working Backwards

is a problem-solving strategy that involves starting with the goal and sequentially planning the steps in reverse to reach the starting point.