The Citric Acid Cycle Is Summarized in the Following Figure

question 9

Multiple Choice

The citric acid cycle is summarized in the following figure. Answer the following question(s) about this cycle.

-In step 1 of the citric acid cycle drawn above, what is the molecule indicated with a question mark?

• A) O₂
• B) ATP
• C) H₂O
• D) H⁺
• E) Pyruvate

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Definitions:

Crystalline Solid

A solid material whose constituents, such as atoms, molecules, or ions, are arranged in an orderly repeating pattern.

Volcanic Glass

A type of rock that forms when lava cools too quickly for crystals to form, resulting in a smooth, glassy texture.

Crystals

Solid materials whose atoms are arranged in a highly ordered, repeating pattern extending in all three spatial dimensions.

Clastic Textures

Textural features found in sedimentary rocks that result from the accumulation and cementation of mineral and rock fragments.