Question

a group of biology students conduct an experiment to investigate the process of cellular respiration in yeast. the students prepare test tubes containing a yeast culture and a solution of one of five sugars: glucose, fructose, lactose, maltose, or sucrose. the students seal each test tube with a stopper and insert a tube into the stopper. the end of the tube is placed underwater in the bottom of an upside down jar. the gas produced by the yeast collects at the top of the jar, and its volume is measured. the students prepare a graph of the average volume of gas produced with each sugar over five trials, as shown. which sugar is the preferred input for cellular respiration?
options:

• fructose
• glucose
• lactose
• maltose

Explanation:

To determine the preferred sugar for cellular respiration, we analyze the bar graph. The gas produced (from yeast respiration) is measured, and more gas means more respiration. The bar for glucose is the tallest, indicating the most gas (and thus most respiration) occurred with glucose.

Answer:

B. glucose