Question

which of the following substrates is fermented at the highest rate by yeast?
multiple choice
sucrose
starch
glycogen
fructose
glucose

Explanation:

Yeast ferments glucose most efficiently. Glucose is a simple sugar (monosaccharide) that can be directly metabolized by yeast in the fermentation process. Fructose is also a monosaccharide but is fermented at a slightly lower rate than glucose. Sucrose is a disaccharide (glucose + fructose) and needs to be broken down into its monosaccharide components first. Starch and glycogen are polysaccharides; they need extensive breakdown into monosaccharides (like glucose) before fermentation, which makes their fermentation rates much lower compared to simple sugars like glucose.

Answer:

glucose