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Cellular Respiration and Energy Production Quiz

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Questions and Answers

What is the definition of a calorie?

The amount of energy needed to raise the temperature of 1 gram of water by 5 degrees Celsius
The amount of energy needed to raise the temperature of 1 pound of water by 1 degree Celsius
The amount of energy needed to raise the temperature of 1 gram of water by 10 degrees Celsius
The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Fahrenheit (correct)

What is the purpose of the Krebs Cycle in cellular respiration?

To transport electrons through the electron transport chain
To release energy by breaking down glucose and other food molecules in the presence of oxygen
To break down glucose into pyruvic acid
To extract energy from the breakdown of pyruvic acid in a series of energy-extracting reactions (correct)

What is the role of NAD+ in glycolysis?

NAD+ is the final electron acceptor in the electron transport chain
NAD+ is a product of the Krebs Cycle
NAD+ is a coenzyme that is involved in the oxidation of glucose to pyruvic acid (correct)
NAD+ is the electron carrier involved in the anaerobic process of fermentation

What is the difference between aerobic and anaerobic cellular respiration?

Both a and b are correct (C) Signup and view all the answers

What is the purpose of the matrix in the mitochondrion?

The matrix is the innermost compartment of the mitochondrion (C) Signup and view all the answers

Which of the following is NOT a key characteristic of the Krebs Cycle in cellular respiration?

It directly oxidizes glucose to release energy (D) Signup and view all the answers

Suppose a cell is undergoing fermentation due to a lack of oxygen. Which of the following electron carriers would NOT be involved in this process?

NADP+ (C) Signup and view all the answers

Which of the following statements about the relationship between cellular respiration and the calorie is INCORRECT?

The calorie is a unit of energy, while cellular respiration is the process of releasing that energy from food molecules (C) Signup and view all the answers

Suppose a cell is undergoing aerobic cellular respiration. Which of the following processes would NOT be occurring within the mitochondrial matrix?

Glycolysis (B) Signup and view all the answers

If a cell is unable to perform aerobic cellular respiration due to a lack of oxygen, which of the following statements about the cell's energy production would be MOST accurate?

The cell will switch to anaerobic respiration, producing lactic acid as a byproduct (D) Signup and view all the answers

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