22 Questions
What is the primary function of catabolic pathways in cellular metabolism?
To release energy by breaking down complex molecules into simpler compounds
What is the term for the study of how organisms manage their energy resources?
Bioenergetics
What type of energy is associated with the random movement of atoms or molecules?
Heat (thermal energy)
What is the energy that matter possesses because of its location or structure?
Potential energy
What is the primary function of anabolic pathways in cellular metabolism?
To consume energy to build complex molecules from simpler ones
What is the main difference between exergonic and endergonic reactions?
Exergonic reactions release energy, while endergonic reactions require energy
What is the term for the capacity to cause change?
Energy
What is the effect of enzymes on the activation energy of a reaction?
They decrease the activation energy
What is the role of ATP in cellular work?
To perform cellular work
Why is an investment of activation energy necessary to initiate a spontaneous reaction?
Because it is necessary to overcome the energy barrier
What is the relationship between the second law of thermodynamics and living organisms?
The second law is not violated by living organisms
What is the role of mitochondria in cellular respiration?
To synthesize ATP
What happens to kinetic energy when a person climbs up?
It is converted to potential energy
What is the total energy of the universe according to the first law of thermodynamics?
Constant
What is the change in free energy (∆G) associated with spontaneous processes?
Negative
What is the direction of spontaneous processes?
Towards equilibrium
What type of reaction is associated with a release of free energy?
Exergonic
What is the relationship between free energy and stability?
Higher free energy is associated with lower stability
What is the role of ATP in cellular work?
To couple exergonic and endergonic reactions
What is the result of ATP hydrolysis?
Energy is released
What is the defining feature of life in terms of metabolism?
Metabolism is never at equilibrium
What is the direction of energy flow in a cell?
From high energy to low energy
This quiz covers the energy of life, chemical reactions, and energy extraction and application in living cells. Understand the basics of metabolism and how it relates to the cell's energy needs. Ideal for students of biology, particularly those studying the 8th edition of Campbell and Reece's Biology.
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