Question

part a the synthesis of macromolecules from smaller molecules ______. see section 2.5 (page) options: requires the addition of water, requires energy, is accomplished by hydrolysis, releases energy

Explanation:

To determine the correct answer, we analyze each option:

• "requires the addition of water": Macromolecule synthesis (dehydration synthesis) removes water, not adds it. Eliminate this.
• "is accomplished by hydrolysis": Hydrolysis breaks macromolecules using water; synthesis (dehydration) builds them. Eliminate this.
• "releases energy": Synthesis of macromolecules (endergonic) requires energy, it doesn't release. Eliminate this.
• "requires energy": Building macromolecules from smaller units (dehydration synthesis) is an endergonic process that needs energy input. This is correct.

Answer:

requires energy