Lactose Intolerance in Humans Is the Inability to Digest a Specific

question 19

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. The building blocks for the enzyme lactase are

• A) proteins.
• B) amino acids.
• C) nucleic acids.
• D) glucose molecules.

Grasp the visualization of probability distributions for continuous and discrete random variables.

Recognize the concept of independence and disjoint events in probability.

Comprehend the principle of probability totaling 1 for a complete sample space.

Differentiate between probability histograms, density curves, and other graphical representations of data.