Question

Why are macromolecules continually being synthesized in a cell?

	a.	Macromolecules typically have a half-life in the order of days.
	b.	If the energy produced by the cell through aerobic respiration is not used, components of the cell will become oxidized.
	c.	Growth of the cell requires the synthesis of new components.
	d.	a and c.
	e.	b and c.

The synthesis of macromolecules is thermodynamically favourable due to which of the following?

	a.	The energy required for the synthesis of macromolecules comes indirectly from substrate-level phosphorylation, oxidative phosphorylation, or photophosphorylation.
	b.	The energy required comes from the synthesis of macromolecules from ribonucleotide triphosphates or deoxyribonucleotide triphosphates.
	c.	The concentration of the reactants (monomers) and products (the macromolecule) completely drives polymer formation.
	d.	The macromolecule possesses less free energy than the monomers, thus no energy is needed.
	e.	a and b.

Which of the following statements is incorrect?

	a.	Lipids are synthesized as linear chains of fatty acids.
	b.	Polysaccharides are synthesized as linear or branched chains of monosaccharides.
	c.	Nucleic acids are synthesized as linear chains of nucleotides.
	d.	Polypeptides are synthesized as linear chains of amino acids.
	e.	None of the above.