AP BIOLOGY

BIOCHEMISTRY

ENZYMES AND METABOLISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Catabolic pathways ____
A
combine molecules into more energy-rich molecules
B
are spontaneous and do not need enzyme catalysis
C
are endergonic
D
supply energy, primarily in the form of ATP, for the cell’s work
Explanation: 

Detailed explanation-1: -Catabolic pathways involve the degradation (or breakdown) of complex molecules into simpler ones. Molecular energy stored in the bonds of complex molecules is released in catabolic pathways and harvested in such a way that it can be used to produce ATP.

Detailed explanation-2: -Catabolic pathways involve the breakdown of complex molecules into simpler ones and typically release energy. Energy stored in the bonds of complex molecules, such as glucose and fats, is released in catabolic pathways.

Detailed explanation-3: -Catabolic reactions often use hydrolysis to break the chemical bonds within larger molecules, which results in a release of energy. Approximately 40% of the energy released is transferred directly into adenosine triphosphate (ATP) molecules.

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