Glycolysis and Krebs Cycle

Glucose is ____________________ during cell respiration

• reduced

• oxidized

Tags

NGSS.HS-LS1-7

Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the removal of a carbon (CO2) from one molecule of pyruvate?

• lactate

• oxaloacetate

• glyceraldehydes–3–phosphate

• acetyl CoA

Tags

NGSS.HS-LS1-7

Where does glycolysis take place?

• Cytosol

• Mitochondrial matrix

• Mitochondrial cristae

• Thylakoid

What is the starting material for glycolysis?

• Pyruvate

• Acetyl CoA

• Glucose

• G3P

Tags

NGSS.HS-LS1-6

What is the main function of glycolysis?

• To rearrange the glucose molecule to be broken down

• To split the glucose molecule to release energy

• To recreate acetyl CoA for the Krebs cycle

• To absorb and store energy in ATP molecules

There are 10 steps in glycolysis, how many enzymes catalyze these steps?

• 8

• 9

• 10

• 11

What are the products of glycolysis?

• 2 ATP, 2 NADPH, 2 pyruvate

• 2 ADP, 2 NADH, 2 pyruvate

• 2 ATP, 2 NADH, 2 pyruvate

• 2 ADP, 2 NADPH, 2 pyruvate

Tags

NGSS.HS-LS1-7

Justify that glycolysis evolved before oxygen was present in the atmosphere.

• Glycolysis does not require oxygen which represents that it evolved prior to free oxygen in the atmosphere

• Glycolysis does not take place in the mitochondria and thus does not require oxygen

• Glycolysis splits a glucose molecule into 2 pyruvate molecules which does not require oxygen

• Glycolysis takes place in all living organisms which means it evolved prior to free oxygen in the atmosphere

Tags

NGSS.HS-LS2-3

NGSS.HS-LS4-2

Justify that glycolysis evolved prior to the mitochondria.

• Glycolysis takes place in the cytosol.

• Glycolysis does not require a membrane which represents that it evolved prior to membrane bound organelles.

• Glycolysis has instructions in the nuclear DNA.

• Glycolysis does not require mitochondrial DNA which represents that it evolved prior to membrane bound organelles.

Match the process with the appropriate products:

Groups:

(a) Glycolysis

,

(b) Link Reaction

,

(c) Krebs Cycle

,

(d) ETC

• 6 Water

• 2 Acetyl-CoA

• 2 FADH2

• 2 ATP

• 2 Carbon Dioxide

• 2 NADH & 4 ATP (2 net ATP)

• ~32 ATP

• 2 Pyruvates

• 6 NADH

• 4 Carbon Dioxide

• 2 NADH

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3