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Students will test the effect of different conditions on lactase, an enzyme that catalyzes the conversion of milk sugar to simple sugar.

These questions focus on the use of catalysts in common industrial reactions and new research on alternatives to the precious metals currently used as catalysts.

Working in pairs, students will analyze a graph of data from one of the cancer experiments described in "Cancer's sweet cloak."

These discussion prompts cover molecular structures and properties of sugars, proteins and lipids, as well as questions related to the immune system and cancer.

Students will explore the history of cancer therapy research by searching the Science News archive.

These questions, based on the Science News article "Cancer's sweet cloak," highlight observations about cell-surface sugars and their ability to hide cancer cells from the immune system.