The Following Question Refers to This Figure of a Simple

question 30

Multiple Choice

The following question refers to this figure of a simple metabolic pathway:

-A mutation results in a defective enzyme A. Which of the following would be a consequence of that mutation?

• A) an accumulation of A and no production of B and C
• B) an accumulation of A and B and no production of C
• C) an accumulation of B and no production of A and C
• D) an accumulation of B and C and no production of A
• E) an accumulation of C and no production of A and B

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Definitions:

Hydrogen Ions

Positively charged ions (H+) that are formed when hydrogen atoms lose or gain an electron and are central to acid-base chemistry.

Cytochrome Molecules

Proteins found within cells that play key roles in electron transport and energy production within mitochondria.

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.

Cristae

Short, fingerlike projections formed by the folding of the inner membrane of mitochondria.