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

Question 1

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

Accepted Answer

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

Question 2

Where in a eukaryotic cell does the Krebs cycle occur?

Accepted Answer

In the mitochondrial matrix

Question 3

During the experiment with bromothymol blue (BTB), why did the solution change from blue to yellow as you exhaled into it?

Accepted Answer

Carbon dioxide from your breath dissolved in water, forming carbonic acid and lowering the pH

Question 4

Which pathway in aerobic cellular respiration produces the most ATP?

Accepted Answer

Electron transport chain/oxidative phosphorylation

Question 5

What is the main purpose of fermentation in cells?

Accepted Answer

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

Question 6

Which of the following is a correct comparison between aerobic respiration and fermentation?

Accepted Answer

Aerobic respiration produces more ATP per glucose molecule than fermentation

Question 7

After two minutes of exercise, what would you expect to happen to your breathing rate and why?

Accepted Answer

Breathing rate increases to supply more oxygen for increased ATP production

Question 8

Which of the following sugars would you expect yeast to ferment most rapidly, based on the experiment setup?

Accepted Answer

Glucose

Question 9

Why can yeast be used to create carbonated alcoholic beverages but not carbonated non-alcoholic beverages?

Accepted Answer

Yeast fermentation always produces ethanol along with carbon dioxide

Question 10

Which of the following best explains why the pH of water decreases when you exhale into it during the BTB experiment?

Accepted Answer

Exhaled CO$$_2$$ reacts with water to form carbonic acid, releasing H$$^+$$ ions

Question 11

Which of the following is a waste product of aerobic cellular respiration in animals?

Accepted Answer

CO$$_2$$

Question 12

What is the role of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They carry electrons to the electron transport chain for ATP production

Question 13

Which of the following best describes the difference between lactic acid fermentation and alcohol fermentation?

Accepted Answer

Lactic acid fermentation produces lactic acid, while alcohol fermentation produces ethanol and CO$$_2$$

Question 14

If a yeast solution with lactose does not produce a CO$$_2$$ bubble during fermentation, what is the most likely explanation?

Accepted Answer

Yeast lacks the enzyme to break down lactose

Question 15

Which of the following is NOT a pathway in aerobic cellular respiration?

Accepted Answer

Photosynthesis

Question 16

During exercise, why does your heart rate increase?

Accepted Answer

To deliver more oxygen and nutrients to muscle cells and remove CO$$_2$$ and waste products

Question 17

Which of the following statements about glycolysis is correct?

Accepted Answer

It occurs in the cytosol and does not require oxygen

Question 18

What is the main metabolic role of cellular respiration in organisms?

Accepted Answer

To convert chemical energy in food into ATP for cellular work

Question 19

Which of the following best explains why the electron transport chain requires oxygen?

Accepted Answer

Oxygen acts as the final electron acceptor, forming water

Question 20

If a student’s BTB solution turns yellow faster after exercise, what does this indicate about their cellular respiration?

Accepted Answer

Their cells are producing more CO$$_2$$ due to increased aerobic respiration

Study Guide for Aerobic Cellular Respiration and Fermentation (BIOLOGY 189 Lab 10)

Study Guide - Practice Questions