Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers

Exercise 9

Conditions in which oxygen is absent are described as ___________. Some microorganisms break down glucose in the absence of oxygen using___________ , which generates only _________molecules of ATP. This process is followed by__________ , in which no more ATP is produced, but the electron-carrier molecule__________ is regenerated so it can be used in further glucose breakdown.