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

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy (ATP)}$$

Question 1

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

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy (ATP)}$$

Question 2

In the experiment measuring oxygen consumption in rats, why are potassium hydroxide (KOH) pellets used in the respiration chamber?

Accepted Answer

To absorb carbon dioxide ($$CO_2) $$produced, preventing it from affecting the water level

Question 3

Which of the following units are used to express the metabolic rate as measured in the rat respiration experiment?

Accepted Answer

milliliters $$O_2/$$hour/gram

Question 4

A student observes that the water level in the U-bend of the respiration apparatus drops as the rat respires. What is the most direct cause of this change?

Accepted Answer

Oxygen is being consumed by the rat, creating a partial vacuum that draws water up

Question 5

Why do smaller animals like hamsters have a higher $$ml\ O_2$/h/g$$ metabolic rate compared to larger animals like elephants?

Accepted Answer

Smaller animals lose heat more rapidly and must generate more energy per gram to maintain homeostasis

Question 6

In the plant embryo experiment, what is the expected result when phenol red is exposed to $$CO_2$$ produced by respiring germinated peas?

Accepted Answer

Phenol red turns yellow, indicating an acidic solution

Question 7

What is the main reason boiled germinated peas do not change the color of phenol red in the experiment?

Accepted Answer

Boiling denatures enzymes, preventing cellular respiration and $$CO_2$$ production

Question 8

During fermentation in yeast, which of the following is regenerated to allow glycolysis to continue?

Accepted Answer

$$NAD^+$$

Question 9

Which of the following best explains why yeast produce more $$CO_2$$ when grown in 1% glucose compared to 1% starch?

Accepted Answer

Glucose is a monosaccharide and can be directly used in glycolysis, while starch must first be hydrolyzed to glucose

Question 10

Which of the following is NOT a product of alcoholic fermentation in yeast?

Accepted Answer

$$O_2$$

Question 11

Refer to the pathway: Starch $$\rightarrow$$ Maltose $$\rightarrow$$ Glucose $$\rightarrow$$ Pyruvate $$\rightarrow$$ Ethanol + $$CO_2. $$Which enzyme is required for the conversion of starch to maltose?

Accepted Answer

Amylase

Question 12

Which structure within the mitochondrion is the primary site of the electron transport chain?

Accepted Answer

Cristae (folds of the inner membrane)

Question 13

If a seed is not placed in water, what is the most likely outcome regarding its respiration activity?

Accepted Answer

It will not germinate and will show little to no respiration

Question 14

Which of the following statements about mitochondria is TRUE?

Accepted Answer

Mitochondria are the site of aerobic cellular respiration in eukaryotes

Question 15

A rat in a respiration chamber consumes 0.5 mL $$O_2 in 10 $$minutes and has a mass of 250 g. What is its oxygen consumption rate in $$ml\ O_2$/h/g$$?

Accepted Answer

$$0.012 ($$rounded to three decimals)

Question 16

Which of the following best describes the role of oxygen in aerobic cellular respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain

Question 17

In the yeast fermentation experiment, which tube would you expect to see the least amount of $$CO_2$$ produced after 20 minutes?

Accepted Answer

Water (diH2O)

Question 18

Which of the following is a correct statement about the relationship between organism size and metabolic rate per gram?

Accepted Answer

Smaller organisms have a higher metabolic rate per gram than larger organisms

Cellular Respiration, Fermentation, and Mitochondria: Study Guide

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