The correct answer is C.Capsule i just finished a test on this
<span>a. constructed from thick aluminum walls that can control the nuclear reactions </span>
In terms of macromolecules, needed and utilized by organisms to carry out essential metabolic chemical reactions and for maintaining structure would be Lipids.
Lipid based molecules or Fats tend to store the most energy, as breaking chemical bonds connecting fatty acid chains of long hydrocarbons releases quite a bit of energy.
Think it’s answer D but it maybe B
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sorry if it’s wrong