Cellular Respiration

Cellular respiration is the name given to a series of biochemical reactions that

• Breaks down ATP

• Breaks down glucose

• Produces oxygen

• Produces glucose

Answer explanation

Glucose is broken down to produce ATP which the cell uses to carry out various functions.

What is the energy molecule that is made during cellular respiration?

• ADP

• NAD+

• ATP

• FAD

Answer explanation

Cellular Respiration breaks down Glucose to create ATP which the cell uses to carry out various functions.

What formula is cellular respiration?

• 
• 
• 
• 

Answer explanation

The equation for Cellular Respiration is the opposite of the equation for Photosynthesis.

Where in the cell does glycolysis occur?

• Cytosol

• Chloroplast

• Nucleus

• Mitochondria

Answer explanation

Cytosol is another word for cytoplasm.

In glycolysis, glucose is broken down into two molecules of what?

• Pyruvate

• Fructose

• Acetyl-CoA

• Lactate

Answer explanation

Pyruvate is created in glycolysis and then goes into the Krebs Cycle.

What is the net gain of ATP at the end of glycolysis?

• 0 ATP

• 1 ATP

• 5 ATP

• 2 ATP

Answer explanation

4 ATP are produced by glycolysis but the process uses 2 so the net gain is 2 ATP.

Which of the following statements is FALSE?

• Glycolysis can occur with or without oxygen

• Glycolysis occurs in the mitochondria

• Glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate

• Glycolysis is the first step in both aerobic and anaerobic respiration

Answer explanation

Glycolysis occurs in the cytoplasm.

Before the Krebs cycle, pyruvate must be broken down into what molecule?

• Pyruvate CoA

• Coenzyme

• Acetyl CoA

• NADH

Answer explanation

In the conversion of pyruvate to acetyl CoA, each pyruvate molecule loses one carbon atom with the release of carbon dioxide.

Where in a eukaryotic cell does the Krebs cycle occurs?

• Chloroplast

• Mitochondria

• Nucleus

• Cytosol

Answer explanation

Krebs Cycle happens in the mitochondria. Glycolysis happens in the cytosol (aka cytoplasm)

Which of the following is a product of the Krebs cycle?

• CO2

• ATP

• NADH and FADH2

• All of the above

Answer explanation

Krebs cycle produce carbon dioxide, ATP, NADH, and FADH2.