Lactose Intolerance Test

What two monosaccharides (simple sugars) are formed when lactase enzyme hydrolyzes lactose?

• Glucose and fructose

• Glucose and galactose

• Galactose and maltose

• Glucose and maltose

Why would measuring blood glucose levels in an individual, 20 to 30 minutes after they drink a liter of milk, indicate whether they are able to digest lactose

• When lactase is digested by lactose, the glucose that is produced enters the bloodstream from the small intestine

• When lactose is digested by lactase, the glucose that is produced enters the bloodstream from the small intestine

• When lactose enters the large intestine, glucose is digested by bacteria and then enters the bloodstream

• The fats and proteins in milk are digested by the body, causing glucose levels in the blood to increase.

A protein that speeds up chemical reactions is

• an enzyme

• a simple sugar

• a complex carbohydrate

• DNA

What is the purpose of lactase?

• To break down glucose into simpler molecules that we can digest

• To synthesize (bring together) lactose so that we can use its nutrients

• To break down lactose into simpler molecules that we can digest

• To be used to pump lactose into the small intestines

Enzymes names usually end with...

• "ase"

• "ose"

• "ise"

• "ese"

Lactose intolerance is most likely caused by -

• A lack of lactase enzyme to breakdown lactose
• Overproduction of glucose and galactose
• Excess lactase enzyme
• A lack of lactose sugar

Why do you need to wait between testing glucose levels in the same sample?

• To allow the solution to warm up

• To allow the lactase time to break down the lactose

• To allow the lactose time to break down the lactase

• This is a trick question. There is not a wait time.

If a person is lactase persistent, which of the following statements are true?

• The person does not have the gene that produces the lactase enzyme.

• The person is unable to break down lactose.

• There will be glucose present in the person's intestinal fluid.

• The person has the lactase gene but it is not turned on.

Tags

NGSS.HS-LS3-2

Describe lactose intolerance.

• A painful sore that forms when the lining of the stomach or beginning of the small intestine.

• Scar tissue prevents the liver from functioning properly.

• Small pebble-like masses form in the gallbladder.

• The inability to produce the enzyme required to digest lactose, which is a sugar in milk and other dairy products.

Which of the subjects in the picture is a disaccharide?

• Lactose

• Lactase

• Glucose

• Galactose