Answer to Question #198615 in Biology for hen

Question

A student stated:

• The rates of respiration with glucose maltose and sucrose were very similar.
• The yeast could not hydrolyse diasaccharides.

Evaluate the students statements.

Answer 1

Sucrose and maltose are disaccharides. If both maltose and sucrose are used by yeasts during respiration, it does not indicate that yeasts do not hydrolyse disaccharides. Other control (i.e., glucose or absence of any carbohydrate) should be used as positive and negative controls of the experiment. As a result, the second statement might be wrong.