Krebs Cycle and Glycolysis Concepts

What kind of molecule is glucose?

• A 3-carbon molecule

• A 6-carbon molecule

• A 2-carbon molecule

• A 4-carbon molecule

What is the process called when a glucose molecule is split into two pyruvate molecules?

• Pyruvate oxidation

• Krebs cycle

• Glycolysis

• Cellular respiration

Where does glycolysis take place inside a cell?

• Nucleus

• Mitochondria

• Cytoplasm

• Cell membrane

What is pyruvate converted into before it enters the Krebs cycle?

• Glucose

• Oxaloacetic acid

• Acetyl-CoA

• ATP

What two molecules combine to create Citric Acid in the cycle?

• Pyruvate and Glucose

• Acetyl CoA and Oxaloacetic Acid

• NADH and FADH2

• ATP and ADP

What happens to the carbon atoms that are removed from Citric Acid during the cycle?

• They become part of water molecules.

• They are released as carbon dioxide.

• They are used to make more glucose.

• They turn into oxygen.

Besides ATP, what two important energy-carrying molecules are produced in the cycle to help make more energy later?

• Pyruvate and Glucose

• Carbon Dioxide and Water

• NADH and FADH2

• Oxaloacetic Acid and Citric Acid

How many NADH molecules are produced from pyruvate oxidation and the Citric Acid Cycle for each molecule of glucose?

• 2

• 4

• 6

• 8

Where does the first step of breaking down glucose for energy happen in a cell?

• Nucleus

• Mitochondria

• Cytoplasm

• Cell wall

What is the main role of NADH and FADH2 in making energy for the cell?

• They store water

• They help break down proteins

• They carry energy to make more ATP

• They build new cell parts