Eating food provides fuel and building blocks for your body |
how food molecules reach the body’s cells and fuel cellular respiration. Step 1 |
After food is broken down in the digestive system, it transported to cells via the circulatory system |
how food molecules reach the body’s cells and fuel cellular respiration. Step 2 |
Fuel molecules are broken down further in glycolysis and the ctric acid cycle (Krebs cycle) |
how food molecules reach the body’s cells and fuel cellular respiration. Step 3 |
ATP is produced with the help of the electron transport chain |
how food molecules reach the body’s cells and fuel cellular respiration. Step 4 |
Select the correct sequence of steps as energy is extracted from glucose during cellular respiration. |
A. glycolysis → acetyl CoA → citric acid cycle → electron transport chain |
What is the correct general equation for cellular respiration? |
B. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy |
Which of the following processes takes place in the cytosol of a eukaryotic cell? |
C. glycolysis |
In what organelle would you find acetyl CoA formation, the citric acid cycle, and the electron transport chain? |
C. mitochondrion |
Which statement describes glycolysis? |
B. This process splits glucose in half and produces 2 ATPs for each glucose. |
Which statement describes the citric acid cycle? |
B. This process produces some ATP and carbon dioxide in the mitochondrion. |
Which statement describes the electron transport chain? |
C. This process uses energy captured from electrons flowing to oxygen to produce most of the ATPs in cellular respiration. |
For each glucose that enters glycolysis, _____ NADH enter the electron transport chain. |
B. 10 |
In cellular respiration, most ATP molecules are produced by _____. |
B oxidative phosphorylation This process utilizes energy released by electron transport. |
The final electron acceptor of cellular respiration is _____. |
C. oxygen |
During electron transport, energy from _____ is used to pump hydrogen ions into the _____. |
B. NADH and FADH2 … intermembrane space |
The proximate (immediate) source of energy for oxidative phosphorylation is _____. |
B. kinetic energy that is released as hydrogen ions diffuse down their concentration gradient |
Which of these enters the citric acid cycle? |
C. acetyl CoA |
In the citric acid cycle, ATP molecules are produced by _____. |
B. substrate-level phosphorylation |
Which of these is NOT a product of the citric acid cycle? |
C. acetyl CoA |
At the end of glycolysis, the original carbons of the glucose molecule form: |
B. two molecules of pyruvate. |
All of the following are true statements about ATP EXCEPT that it is: |
B. synthesized only within mitochondria. |
During which step of aerobic respiration is oxygen used? |
C. electron transport system |
What is the purpose of the electron transport chain? |
C. To use energy from the passing of electrons in electron carriers into a high concentration of hydrogen ions |
Why do cells convert the energy stored in the bonds of glucose into energy stored in the bonds of ATP? |
C. Glucose is not a usable energy source for most enzymes. |
In muscle cells, fermentation produces _____. |
C. lactate and NAD+ |
In fermentation _____ is reduced and _____ is oxidized. |
B. pyruvate … NADH |
If glucose is metabolized under completely anaerobic conditions, then pyruvate: |
A. is converted by fermentation to CO2 and ethanol or to lactate. |
Chemiosmosis in mitochondria directly results in the synthesis of: |
B. ATP. |
Which of the following is common to both fermentation and cellular respiration? |
C. glycolysis |
You want to lose weight. Which of the following combinations would likely work best? |
C. Eat nuts and whole wheat bread, and sleep for 7-8 hours per night. |
According to this study, which of the following would be best to avoid if you want to lose weight? |
B. French fries |
Which of the following is true? |
A. Physical activity had less impact on weight than foods eaten. |
According to this study, which of the following is true? |
B. If a person quits smoking, they are likely to gain weight. |
What effect does watching television have on weight? |
C. As television watching increases, weight also increases. |
For bacteria to continue growing rapidly when they shift from an aerobic environment to an anaerobic environment, they must: |
C. increase the rate of glycolysis-based reactions. |
What molecule is common to both C3 photosynthesis and the process of glycolysis? |
C. pyruvate |
How many NADH are produced by glycolysis? |
C. 2 |
In glycolysis, ATP molecules are produced by _____. |
C. substrate-level phosphorylation |
Which of these is NOT a product of glycolysis? |
C. FADH2 |
In glycolysis, what starts the process of glucose breakdown? |
C. ATP |
In glycolysis there is a net gain of _____ ATP. |
B. 2 |
The step in aerobic respiration that produces the most ATP per molecule of glucose is: |
B. chemiosmosis. |
Where have the carbon atoms orignially present in glucose gone after the Krebs cycle has been completed? |
C. Two were lost in acetyl CoA formation and four were lost in the Krebs cycle. |
Which of the following is a proper description of the path of hydrogen ions during the electron transport chain and chemiosmosis? |
B. Hydrogen ions from the matrix are pumped into the intermembrane space, then flow back into the matrix through ATP synthase. |
What reactants are always necessary to make NADH during the energy extraction reactions? |
D. NAD+, two electrons, and H+ |
The inner membrane of the mitochondria can be compared functionally to the thylakoid membranes of the chloroplast because both contain a system for: |
A. electron transport. |
Why is respiration a better method than fermentation for extracting energy from glucose? |
C. Respiration extracts energy from pyruvate that is wasted in fermentation. |
The insecticide rotenone inhibits one of the steps of the electron transport system in mitochondria. What is a likely immediate result? |
B. The rate of fermentation will increase. |
As a bicyclist pedals up a hill to the finish line of a race and "feels the burn" in his leg muscles, those muscle cells are most likely utilizing: |
A. some lactate fermentation. |
Ch.8 Mastering Biology 1001
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