Citric Acid Cycle Quiz

What is the initial substrate that enters the citric acid cycle after glycolysis?

• Pyruvate

• Acetyl-CoA

• Oxaloacetate

• Citrate

Tags

NGSS.HS-LS1-7

Which molecule is regenerated at the end of the citric acid cycle?

• Citrate

• Acetyl-CoA

• Oxaloacetate

• Pyruvate

How many carbon dioxide molecules are produced per acetyl-CoA molecule in the citric acid cycle?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

What are the electron carriers produced during the citric acid cycle?

• NADH and FADH2

• NAD+ and FAD

• ATP and ADP

• CO2 and H2O

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

What is the primary purpose of redox reactions in cells?

• To store energy in the form of glucose

• To release and transfer useful energy from food molecules

• To produce oxygen as a byproduct

• To create new cells

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Which molecule is formed from ADP during redox reactions?

• GTP

• FADH₂

• ATP

• NADH

Tags

NGSS.HS-LS1-7

What is produced during pyruvate oxidation in the mitochondrion?

• Glucose and oxygen

• Acetyl CoA and NADH

• Water and ATP

• FADH₂ and GTP

Tags

NGSS.HS-LS1-7

What waste product is produced from pyruvate during oxidation?

• Oxygen

• Water

• Carbon dioxide (CO₂)

• Glucose

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

NGSS.HS-LS2-5

What is the role of FADH₂ and NADH in the mitochondrion?

• To store glucose

• To supply electrons to the electron transport chain

• To produce carbon dioxide

• To create new mitochondria

Tags

NGSS.HS-LS1-7

What is the result of oxidation in a substance?

• Gain of electrons

• Loss of electrons

• Gain of protons

• Loss of protons