Understanding the Citric Acid Cycle

What is the primary function of mitochondria in cells?

• To store genetic information

• To produce energy and aid in biosynthesis

• To transport nutrients

• To protect the cell from toxins

What molecule is formed when a two-carbon acetyl group is transferred to oxaloacetate?

• Citric acid

• Fumarate

• Isocitrate

• Malate

During step 3 of the citric acid cycle, what is released as a waste product?

• Carbon dioxide

• Water

• NADH

• Oxygen

Which complex is involved in step 4 of the citric acid cycle?

• A lipid complex

• A multi-enzyme complex

• A protein complex

• A single enzyme

Which molecule carries electrons to the electron transport chain during the citric acid cycle?

• ATP

• NADH

• GTP

• FADH2

What is the role of GTP in the citric acid cycle?

• It transports electrons

• It provides energy for protein synthesis

• It is a building block of DNA

• It acts as a waste product

Which enzyme is responsible for the oxidation of succinate in step 6?

• Complex IV

• Complex I

• Complex II

• Complex III

What is the role of coenzyme Q in the electron transport chain?

• It carries electrons

• It stores energy

• It breaks down glucose

• It synthesizes proteins

What is the final product of the citric acid cycle that is regenerated for another cycle?

• Fumarate

• Malate

• Isocitrate

• Oxaloacetate

What is the significance of the citric acid cycle in cellular metabolism?

• It only produces waste products

• It generates energy and materials for biosynthesis

• It breaks down proteins

• It stores energy for later use