Catabolic pathways ________.
A) combine molecules into more energy-rich molecules
B) supply energy, primarily in the form of ATP, for the cell's work
C) are endergonic
D) are spontaneous and do not need enzyme catalysis
E) build up complex molecules such as protein from simpler compounds

Question

Quizplus · Accepted Answer

Catabolic pathways break down complex molecules into simpler ones and release energy in the process. This released energy is used to produce ATP, which is the primary source of cellular energy for cell work. Therefore, choice B is the correct answer. Choices A, C, D, and E are incorrect because catabolic pathways do not combine molecules into more energy-rich ones, are exergonic rather than endergonic, require enzyme catalysis, and break down complex molecules into simpler ones rather than building them up.

Catabolic Pathways ________