The Krebs Cycle

Where does the Krebs cycle take place?

• Cytoplasm

• Inner Mitochondrial Membrane

• Outer Mitochondrial Membrane

• Mitochondrial Matrix

The waste product produced during the Krebs cycle is...

• Oxygen

• Water

• Carbon Dioxide

• ATP

Tags

NGSS.HS-LS2-3

The initial reaction of the Krebs cycle produces:

• Glucose and pyruvate

• H₂O and CO₂

• CO₂, acetyl-CoA, and NADH

• Coenzyme A and NADH

Acetyl-CoA is joined up to a ________________________ to form ________________________.

• 6 carbon compound; acetate

• 3 carbon compound; acetyl-CoA

• 4 carbon compound; acetyl-CoA

• 4 carbon compound; citric acid

• 6 carbon compound; citric acid

For the two pyruvic acids that enter from glycolysis, the Krebs cycles will yield:

• ATP, 2 NADH, and 1 FADH₂

• 1 ATP, 2 NADH, and 2 FADH₂

• 1 ATP, 3 NADH, and 1 FADH₂

• 2 ATP, 8 NADH, and 2 FADH₂

• 2 ATP, 4 NADH, and 2 FADH₂

Tags

NGSS.HS-LS1-7

Which of the following is not a requirement for the Krebs Cycle?

• NAD+

• FAD+

• Water

• Pyruvate

How many CO₂ molecules are produced by the Krebs Cycle for each (single) molecule of glucose?

• 2

• 4

• 6

• 3

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Prior to entering the Krebs Cycle, each pyruvate molecule loses some electrons, hydrogen ions, and a carbon atom...then gets combined with coenzyme - A. This intermediary reaction forms an energy-rich molecule called ______________

• Acetyl-CoA

• Citrate

• Oxaloacetate

• Malate

Tags

NGSS.HS-LS2-3

How many turns of the Krebs cycle will each glucose molecule produce?

Tags

NGSS.HS-LS1-7

The Krebs cycle takes place in which organelle?