Q: Which equation correctly represents the overall process of cellular respiration?

$$C_6H_{12}O_6$ + 6\ \mathrm{O}_2 \rightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + \text{ATP}$$

Question 1

Which of the following best describes the role of Malathion, as shown in the first image, in cellular processes?

Accepted Answer

It acts as a noncompetitive inhibitor, altering the shape of enzymes in insects and disrupting metabolic pathways.

Question 2

A person experiences muscle soreness after intense exercise, as shown in the second image. Which metabolic process is primarily responsible for this sensation?

Accepted Answer

Lactic acid fermentation due to insufficient oxygen supply

Question 3

The third image shows a vineyard and wine production. Which cellular process in yeast is responsible for the production of alcohol in wine?

Accepted Answer

Alcohol fermentation, where pyruvate is converted to ethanol and CO$$_2$$

Question 4

Which equation correctly represents the overall process of cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6\ \mathrm{O}_2 ightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{ATP}$$

Question 5

Which stage of cellular respiration produces the most ATP?

Accepted Answer

Oxidative phosphorylation

Question 6

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

2 ATP

Question 7

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy and are not consumed in the reaction.

Question 8

Which molecule acts as the final electron acceptor in the electron transport chain during cellular respiration?

Accepted Answer

O$$_2$$

Question 9

What is the main purpose of feedback inhibition in metabolic pathways?

Accepted Answer

To prevent the overproduction of end products by inhibiting an early enzyme in the pathway

Question 10

Which of the following best explains why your body temperature increases during vigorous exercise?

Accepted Answer

Some energy from glucose is lost as heat during cellular respiration, increasing body temperature.

Question 11

Which process is responsible for the recycling of NAD$$^+$$ during fermentation?

Accepted Answer

Reduction of pyruvate to lactate or ethanol

Question 12

A competitive inhibitor affects an enzyme by:

Accepted Answer

Blocking the substrate from entering the active site

Question 13

Which of the following is a correct description of substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from an organic molecule to ADP

Question 14

Which stage of cellular respiration occurs in the cytosol?

Accepted Answer

Glycolysis

Question 15

Which of the following best describes the fate of the carbons from glucose during cellular respiration?

Accepted Answer

They are released as CO$$_2$$ during the citric acid cycle and pyruvate oxidation.

Question 16

Facultative anaerobes are organisms that:

Accepted Answer

Can switch between fermentation and oxidative phosphorylation depending on oxygen availability

Question 17

Which of the following is a real-life example of feedback inhibition?

Accepted Answer

The end product of a metabolic pathway binding to an enzyme early in the pathway, reducing its activity

Question 18

Which of the following statements about the citric acid cycle is correct?

Accepted Answer

It completes the breakdown of glucose and produces CO$$_2$$, NADH, and FADH$$_2.$$

Question 19

Which of the following best explains why yeast is used in bread making?

Accepted Answer

Yeast performs alcohol fermentation, producing CO$$_2$$ that causes the dough to rise.

Question 20

Which of the following is a correct statement about energy transformations in cells?

Accepted Answer

Energy transformations increase entropy, with some energy lost as heat.

Cellular Energy and Cellular Respiration: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard