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Quiz about Biology Breathing and You
Quiz about Biology Breathing and You

Biology, Breathing, and You Trivia Quiz


This is a quiz specifically designed to focus on a vital function of the body: cellular respiration, or more commonly known as breathing for those who are not as scientifically adept as others. Have fun and learn something!

A multiple-choice quiz by Jayman88. Estimated time: 4 mins.
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Author
Jayman88
Time
4 mins
Type
Multiple Choice
Quiz #
167,649
Updated
Feb 05 23
# Qns
15
Difficulty
Average
Avg Score
9 / 15
Plays
4915
Awards
Top 35% Quiz
- -
Question 1 of 15
1. Which of the following do cells directly obtain energy from? Hint


Question 2 of 15
2. All cells undergo cellular respiration all the time.


Question 3 of 15
3. Which molecule is involved in the transport of electrons during the electron transport system? Hint


Question 4 of 15
4. Oxygen in the electron transport system bonds to what molecule to form H20 (water)? Hint


Question 5 of 15
5. Between which bonds in the phosphate groups of ATP can energy be easily released? Hint


Question 6 of 15
6. Each reaction during cellular respiration is catalyzed by a specific enzyme.


Question 7 of 15
7. What is the main function of coenzyme A in respiration? Hint


Question 8 of 15
8. What is the alternate name of oxygen in the electron transport system? Hint


Question 9 of 15
9. In what organelle do both the Krebs cycle and the electron transport system occur? Hint


Question 10 of 15
10. Which situation is accurate for describing when the energy from the hydrogen ions is transferred into ATP molecules? Hint


Question 11 of 15
11. The energy produced by cellular respiration is used to drive biosynthesis.


Question 12 of 15
12. A track athlete has just finished running a two-mile race nonstop for his team. His legs are aching, but he does not know why. Which of the following processes of fermentation can we assume he has undergone? Hint


Question 13 of 15
13. What portion of the mitochondria does the electron transport system occur in? Hint


Question 14 of 15
14. Our cells can directly use the energy supplied by nicotinamide adenosine dinucleotide molecules.


Question 15 of 15
15. Which of the following does an organism not need energy for? Hint



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Most Recent Scores
Feb 29 2024 : ptc123: 7/15
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quiz
Quiz Answer Key and Fun Facts
1. Which of the following do cells directly obtain energy from?

Answer: Adenosine Triphosphate (ATP)

ATP is directly used by the cell. The cell obtains energy and a phosphate group from ATP, and thus ADP is left to be resynthesized. NADH and FADH must proceed through the Krebs cycle and the electron transport system, where their energy will be transferred into ATP molecules.
2. All cells undergo cellular respiration all the time.

Answer: False

By definition respiration requires electrons to travel down an electron transport chain to a terminal electron acceptor. In aerobic respiration, the terminal electron acceptor is oxygen. In anaerobic respiration, the terminal electron acceptor is something other than oxygen. Fermentation occurs in some cells when oxygen is depleted.

The purpose of fermentation is to regenerate NAD+, a coenzyme that is necessary for glycolysis. There is no electron transport system involved in fermentation; therefore, fermentation is not the same thing as anaerobic respiration. Most cells undergoing respiration produce ATP via glycolyis.
3. Which molecule is involved in the transport of electrons during the electron transport system?

Answer: Cytochrome

The energy released from the electrons as they move from cytochrome to cytochrome is used to actively transport hydrogen ions into the inner-membrane space.
4. Oxygen in the electron transport system bonds to what molecule to form H20 (water)?

Answer: Terminal Cytochrome

An oxygen (electron acceptor) molecule accepts the electron from the terminal cytochrome and bonds to two hydrogen ions to form water.
5. Between which bonds in the phosphate groups of ATP can energy be easily released?

Answer: 2nd and 3rd bonds

A phosphate group is composed of three individual phosphate. Between the 2nd and 3rd phosphate groups is a relatively weak bond that is often prone to release energy and a phosphate. When this event happens, ATP is desynthesized and becomes ADP.
6. Each reaction during cellular respiration is catalyzed by a specific enzyme.

Answer: True

Enzymes are specific, meaning that each one has a unique task to perform during respiration. The enzymes aid in allowing respiration to occur in a series of reactions to release energy in small usable amounts.
7. What is the main function of coenzyme A in respiration?

Answer: Carries the acetate to the Krebs cycle

In aerobic respiration, the main function of coenzyme A is to carry the acetate from the acetyl CoA in the transition reactions directly to the Krebs cycle.
8. What is the alternate name of oxygen in the electron transport system?

Answer: Electron acceptor

An oxygen (electron acceptor) "accepts the electron from the terminal cytochrome and bonds to two hydrogen ions to form water.
9. In what organelle do both the Krebs cycle and the electron transport system occur?

Answer: Mitochondrion

The purpose of the mitochondrian is to supply energy to the cell, and the only way it can achieve this goal is to obtain energy from the ATP molecules that are produced during both the Krebs cycle and the electron transport system.
10. Which situation is accurate for describing when the energy from the hydrogen ions is transferred into ATP molecules?

Answer: Hydrogen ions diffuse back into the matrix

The hydrogen ions in the inner-membrane space contain energy, and as the hydrogen ions diffuse back into the matrix (the site of the Krebs cycle), that energy is transferred into the ATP molecules so that the cell can directly use it.
11. The energy produced by cellular respiration is used to drive biosynthesis.

Answer: True

In order for new molecules to be produced, biosynthesis must have several molecules to be used as activation energy so that the process may begin.
12. A track athlete has just finished running a two-mile race nonstop for his team. His legs are aching, but he does not know why. Which of the following processes of fermentation can we assume he has undergone?

Answer: Lactic acid fermentation

We can automatically rule out ethanol fermentation because it only occurs in yeast cells (fungi), and acetic acid fermentation because it only occurs in bacterial cells. Therefore, we can assume it is lactic acid fermentation, which occurs in the muscle cells on occasion in humans and animals. Because hardly any oxygen is supplied to the muscle cells, lactic acid builds up, which causes sore muscles.
13. What portion of the mitochondria does the electron transport system occur in?

Answer: Cristae

By definition, the cristae are the foldings of the inner mitochondrial membrane that form a series of "shelves" that contain the electron transport systems involved in ATP formation.
14. Our cells can directly use the energy supplied by nicotinamide adenosine dinucleotide molecules.

Answer: False

In order for any energy to be obtained for usage by the cell, the cell must first take the NADH molecules to the electron transport system, where the energy will be transferred to the ATP molecules.
15. Which of the following does an organism not need energy for?

Answer: Organisms need energy for all of these activites

Though these are common needs for energy from organisms, other such uses include heart beat, active transport, and biosynthesis (producing new molecules).
Source: Author Jayman88

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