Cellular Respiration Quiz

Question 1

What is the function of the mitochondria?

Answer 1

Powerhouse of the cell, performs cellular respiration and act as the digestive system for cells.

Question 2

How are the mitochondria different from the chloroplasts?

Answer 2

Mitochondria don’t perform photosynthesis.

Question 3

How are the mitochondria similar to the chloroplasts?

Answer 3

They both are bounded by 2 membranes and they both synthesize ATP.

Question 4

What is the principal compound that provides the cell with energy?

Answer 4

ATP

Question 5

Describe the difference in how autotrophs and heterotrophs obtain the raw materials(food) which will provide them with energy.

Answer 5

Autotrophs make their own food by photosynthesis and heterotrophs get food from other organisms.

Question 6

Where does glycolysis happen?

Answer 6

The cytoplasm

Question 7

What is the net gain of ATP from glycolysis?

Answer 7

2 ATP is gained

Question 8

What determines the next pathway in cellular respiration?

Answer 8

If oxygen is still present

Question 9

How much of chemical energy in glucose is still available after glycolysis?

Answer 9

90% chemical energy is left.

Question 10

Where does the Krebs cycle happen?

Answer 10

Mitochondria

Question 11

Why is the Krebs cycle also known as the Citric acid cycle?

Answer 11

Citric acid is the first compound formed in series of reactions.

Question 12

What product of the Krebs cycle is released into the atmosphere?

Answer 12

CO2

Question 13

What energy carriers are produced during the Krebs cycle? What will happen to these molecules?

Answer 13

NADPH and FADH2. They are passed onto the electron transport chain.

Question 14

How much ATP is produced by the Krebs cycle?

Answer 14

1 ATP

Question 15

Where did the NADH and FADH2 come from in the ETC?

Answer 15

2NAD+ and FAD

Question 16

What is the final electron acceptor in the ETC?

Answer 16

4H+ + O2

Question 17

Where is the ETC happen in eukaryotes?

Answer 17

The mitochondria’s inner membrane

Question 18

Where does the ETC happen in prokaryotes?

Answer 18

The plasma membrane

Question 19

Which part of photosynthesis is the ETC similar to?

Answer 19

light-dependent reactions

Question 20

How much ATP is generated by the ETC?

Answer 20

3 ATP

Question 21

Aerobic respiration converts approximately 38% of glucose’s energy into ATP. What happens to the other 62% of the energy?

Answer 21

The other 62% is released as heat during the breakdown of glucose.

Question 22

What is alcoholic fermentation?

Answer 22

Alcoholic fermentation produces CO2 and alcohol. It causes bread dough to rise. When yeast in dough runs out of oxygen, it ferments. The alcohol in the dough evaporates after it gets baked. This takes place in the mitochondria.

Question 23

What is lactic acid fermentation?

Answer 23

Lactic acid fermentation is produced in human cells during exercise when the body can’t supply enough oxygen to the tissues. It helps the muscles make ATP when your muscles run out of oxygen. It takes place in the cytoplasm.

Question 24

Compare the amount of usable energy that is produced in aerobic respiration to that produced in anaerobic respiration.

Answer 24

Aerobic respiration needs oxygen to work. Anaerobic respiration is a form of respiration using electron acceptors other than oxygen. The energy-releasing pathways within cells require oxygen, and that it the reason we need oxygen to breathe.

Question 25

Describe how the human body obtains energy during exercise.

Answer 25

The breakdown of glucose during cellular respiration gives people energy during exercise. The glucose and other important chemicals come in our food. When the nutrients/chemical building blocks are stored, our body gets energy.

Question 26

What is the chemical equation for cellular respiration?

Answer 26

6O2 + C6H12O6 —–> 6CO2 + 6H2O + energy

Question 27

What is the cellular respiration equation in words?

Answer 27

oxygen + glucose —-yields—–>carbon dioxide + water + energy

Question 28

How is respiration different from photosynthesis?

Answer 28

Photosynthesis uses light energy to convert carbon dioxide into glucose. Oxygen is produced as a by product during photosynthesis. Sugar and other carbohydrates are used as fuel by cells. During cellular respiration, glucose is broken down using oxygen. This reaction releases energy which is used to create ATP molecules.