Homework SourseWhy are macromolecules continually being synthesized in a ce
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.
| 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. |
Solution
Why are macromolecules continually being synthesized in a cell?
The answer is option e. Both statements b and c are correct as the growing cell requires continuous synthesis of macromolecules for the buildup of new cells which requires the continuous flow of the building blocks.
The synthesis of macromolecules is thermodynamically favorable due to which of the following?
The answer is the option is e. Both the option a and b are correct as the energy for the synthesis of macromolecules comes in the form of CTP, GTP, or UTP. this energy comes from the photophosphorylation, substrate level phosphorylation, and oxidative phosphorylation which form the energy transferring molecules.
Which of the following statements is incorrect?
All the statements are correct except the statement a. Lipids are not a linear chain of fatty acids rather are small molecules forming vesicles or liposomes or in the lamellar of membranes.
