Question

Which of the following statements about metabolic pathways is false?
a. The product of one reaction becomes the reactant for the next reaction.
b. They are a series of enzyme-catalyzed reactions.
c. Almost all are anabolic.
d. They are similar in all organisms.
e. Many are compartmentalized in eukaryotes.

Answer 1

C

A metabolic pathway is a chain of sequenced reaction whereby the products of the preceding reaction act ad the substrate for the proceeding reaction, until a final product is achieved.

Metabolic pathways are not necessarily anabolic. Some are catabolic.

Explanation:

Examples of catabolic pathways are the Krebs and Glycolysis cycles that are used by cells to generate ATPs. They break down the bonds of glucose molecules to harness the chemical energy in the bonds.

Examples of anabolic metabolic pathways is the Calvin cycle in plants that uses up ATP energy to reduce carbon dioxide into carbohydrates, storing sunlight energy into chemical energy in the bonds of the glucose molecules.

Virtually all organisms that share the same ancestor have the same metabolic.pathways in cells hence revealing an evolutionary relationship.

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