Yeast cells reproduce by a process known as budding, which is asexual. The basic division is by mitosis.
From the overall steps of
alcohol fermentation you can see that for every mole of glucose used, 2
moles of carbon dioxide are generated. One test for carbon dioxide is to bubble
the gas in question through a barium hydroxide solution. The presence of a white
precipitate indicates carbon dioxide gas since:
When the gas from an active yeast culture is bubbled through a 0.1 M Ba(OH)2 solution a white precipitate will form indicating the gas produced is carbon dioxide.
Benedict's reagent is used as a simple test for reducing sugars. As stated in lab 2, reducing sugars have either a free aldehyde or a ketone group as part of their molecular structure.
Glucose is a reducing sugar, while the disaccharide sucrose is not.
Glucose heated in Benedict's reagent reduces Cu++ ions to form a green to brick-red precipitate depending on the amount of sugar present.
