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

$$\text{Sugar} + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{energy}$$

Question 1

Which of the following equations correctly represents the overall process of cellular respiration?

Accepted Answer

$$	ext{Sugar} + 	ext{O}_2 ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{energy}$$

Question 2

During photosynthesis, plants convert energy from the sun into which form of energy stored in sugar molecules?

Accepted Answer

Potential energy

Question 3

Why does cellular respiration produce less weight in carbon dioxide than the original weight of glucose and oxygen consumed?

Accepted Answer

Because water is a smaller molecule than carbon dioxide

Question 4

Which process is energetically coupled to make ATP and other energy carriers during cellular respiration?

Accepted Answer

Redox reactions

Question 5

What is the main reason fermentation is considered less efficient than aerobic respiration?

Accepted Answer

Fermentation produces much less ATP per glucose molecule

Question 6

Which molecule is directly used to couple endergonic and exergonic reactions in cells?

Accepted Answer

ATP

Question 7

In glycolysis, what are the main products formed from the breakdown of one glucose molecule?

Accepted Answer

2 pyruvate molecules and ATP

Question 8

Which stage of cellular respiration involves the transfer of electrons from NADH and FADH2 to the electron transport chain, resulting in the transport of H$$^+$$ ions across a membrane?

Accepted Answer

Oxidative phosphorylation

Question 9

If a cell is deprived of oxygen, which process will it rely on to produce ATP?

Accepted Answer

Fermentation

Question 10

Which of the following best explains why ATP is considered 'very unstable'?

Accepted Answer

The high-energy phosphate bonds are easily broken, releasing energy

Question 11

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

Accepted Answer

ATP is produced by the transfer of a phosphate group from a phosphorylated substrate to ADP

Question 12

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

Accepted Answer

Photosynthesis

Question 13

A patient is unable to efficiently use oxygen in their cells. Which process will be most affected?

Accepted Answer

Aerobic respiration

Question 14

Which of the following statements about energy and atoms in photosynthesis and cellular respiration is correct?

Accepted Answer

Both processes involve conversion of energy and the breaking/building of chemical bonds between carbons

Question 15

During the electron transport chain, what is the main role of redox reactions?

Accepted Answer

To release energy in a controlled manner for ATP synthesis

Question 16

Which of the following is a real-world consequence of inefficient fermentation in muscle cells during intense exercise?

Accepted Answer

Accumulation of lactic acid leading to muscle fatigue

Question 17

If a plant stores the sugar produced during photosynthesis, what process will it use to later extract energy from that sugar?

Accepted Answer

Cellular respiration

Question 18

Which of the following best describes the relationship between photosynthesis and cellular respiration?

Accepted Answer

They are nearly opposite processes in terms of reactants and products

Question 19

A scientist measures the ATP yield from one glucose molecule in aerobic respiration. What is the expected number of ATP molecules produced?

Accepted Answer

29

Question 20

Which of the following is a multi-step process that includes glycolysis, pyruvate processing, citric acid cycle, and electron transport chain?

Accepted Answer

Cellular respiration

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