$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{ATP}$$

Question 1

Which of the following best describes the overall equation for cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{ATP}$$

Question 2

During glycolysis, what is the main product formed from the breakdown of glucose?

Accepted Answer

Pyruvic acid

Question 3

Which stage of cellular respiration produces the largest amount of ATP?

Accepted Answer

Electron transport chain

Question 4

Where does the citric acid cycle occur within the cell?

Accepted Answer

Inside the mitochondria

Question 5

What is the primary purpose of fermentation in cells?

Accepted Answer

To regenerate NAD$$^+ so $$glycolysis can continue

Question 6

Which of the following is a byproduct of lactic acid fermentation in human muscle cells?

Accepted Answer

Lactic acid

Question 7

Yeast cells in an anaerobic environment produce which two main byproducts during fermentation?

Accepted Answer

Ethyl alcohol and carbon dioxide

Question 8

Which molecule acts as the central currency for energy in all living organisms?

Accepted Answer

ATP

Question 9

What is the main input for glycolysis?

Accepted Answer

Glucose

Question 10

Which of the following statements about cellular respiration is TRUE?

Accepted Answer

It can use carbohydrates, fats, and proteins as inputs to produce ATP.

Question 11

During the electron transport chain, what happens to the electrons at the end of the chain?

Accepted Answer

They combine with oxygen to form water.

Question 12

Which of the following is NOT a product of cellular respiration?

Accepted Answer

Oxygen

Question 13

If a person is sprinting and their muscles run out of oxygen, which process will their muscle cells use to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 14

Which carrier molecules are charged with high-energy electrons during the citric acid cycle?

Accepted Answer

NADH and FADH$$_2$$

Question 15

What is the main output of the electron transport chain?

Accepted Answer

A large amount of ATP

Question 16

Which food molecules can be used by cells to produce ATP through cellular respiration?

Accepted Answer

Carbohydrates, fats, and proteins

Question 17

What is the main waste product released during the citric acid cycle?

Accepted Answer

Carbon dioxide

Question 18

Which process is described as the anaerobic harvesting of energy from glucose?

Accepted Answer

Fermentation

Question 19

Why can certain bacteria survive entirely on fermentation, while human cells cannot?

Accepted Answer

Bacteria require less ATP and can produce enough through fermentation.

Question 20

Which of the following best explains why bread rises during baking?

Accepted Answer

CO$$_2$$ produced by yeast fermentation causes the dough to expand.

Cellular Respiration and Fermentation: Energy Pathways in Biology

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