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WorksheetsCh 2: Fuel for Exercise
Total questions: 16
Worksheet time: 8mins
What are substrates in the context of bioenergetics?
Waste products of metabolism
Fuel sources for energy production
Enzymes that catalyze reactions
Hormones regulating body functions
What is the total amount of energy available from body stores of fuels in kilocalories?
74,833
7,961
73,320
1,513
What is one function of enzymes in chemical reactions?
Increase the activation energy
Lower the activation energy
Neutralize the reaction
Stop the reaction
What do enzymes NOT do in a chemical reaction?
Start the reaction
Facilitate breakdown
Lower activation energy
End with -ase
What influences the activity of a rate-limiting enzyme?
Positive feedback
Negative feedback
Neutral feedback
No feedback
What is the result of ATP breakdown besides energy?
Glucose
ADP and Pi
Oxygen
Carbon dioxide
What is the significance of ATP being a high-energy phosphate?
It stores genetic information
It provides a quick energy source
It transports nutrients
It builds cell walls
What is the main function of ATPase in the cell?
To synthesize proteins
To break down ATP
To transport oxygen
To store energy
Which ATP synthesis pathway involves oxidative phosphorylation?
ATP-PCr system
Glycolytic system
Oxidative system
Photosynthetic system
What is a catabolic reaction?
A reaction that requires an input of energy
A reaction that forms complex molecules from simple building blocks
A reaction that releases energy
A reaction that breaks down complex molecules into their components
Which of the following is NOT a characteristic of enzymes?
They act as catalysts
They have specific active sites
They are consumed in reactions
They are proteins
What is the role of NAD+ in cellular respiration?
To act as an electron carrier
To store energy
To break down glucose
To synthesize ATP
Which process directly produces the most ATP during cellular respiration?
Electron Transport Chain
Fermentation
Citric Acid Cycle
Glycolysis
What is the primary role of the electron transport chain in cellular respiration?
To break down fatty acids
To generate a proton gradient
To produce glucose
To synthesize proteins
Which molecule acts as the final electron acceptor in the electron transport chain?
NADH
Oxygen
ATP
Carbon dioxide
What is the main purpose of glycolysis in cellular metabolism?
To generate carbon dioxide
To convert glucose into pyruvate
To produce oxygen
To synthesize lipids
