60 Questions
Which type of reaction releases energy and is spontaneous?
Exergonic reaction
Which type of reaction requires an input of energy and is non-spontaneous?
Endergonic reaction
Which process does not require continuous energy input to continue?
Spontaneous process
Which process requires continuous energy input to proceed in a certain direction?
Non-spontaneous process
What is the equation for Gibbs free energy?
G = H - TS
What does a negative enthalpy change indicate in a chemical reaction?
Exothermic reaction
Which law of thermodynamics states that every energy transfer or transformation increases the entropy or disorder of the universe?
Second law of thermodynamics
What is entropy?
A measure of the amount of order or disorder of a system
What is enthalpy?
The amount of heat energy possessed by substances
What is Gibbs free energy used for in chemistry?
To determine whether a chemical process is spontaneous or non-spontaneous
What do enzymes do in chemical reactions?
Speed up chemical reactions by lowering the activation energy required
What is enzyme specificity?
The ability of enzymes to work with multiple substrates
Which of the following is true about metabolism?
All of the above
What is the function of enzymes in metabolic pathways?
Enzymes catalyze specific chemical reactions.
Which of the following is an example of an anabolic reaction?
The building of complex organic molecules from smaller ones.
What is the definition of potential energy?
Energy stored in an object due to its location or structure.
What is the second law of thermodynamics?
Entropy tends to increase in a closed system over time.
What type of system exchanges both matter and energy with its surroundings?
Open system
Which one of the following best describes metabolism?
The sum of all reactions that occur in cells
Which one of the following is an example of a catabolic reaction?
Breaking down large molecules into smaller molecules
Which one of the following forms of energy is converted into chemical energy through photosynthesis?
Solar energy
Which one of the following best describes a closed thermodynamic system?
Energy can be exchanged between the surroundings and the system, but matter stays within the system
Which one of the following best describes the first law of thermodynamics?
The energy of the universe is constant and can be transferred or transformed but not created or destroyed
Which one of the following is NOT a learning objective of the lecture?
Catabolic and anabolic reactions
Which law of thermodynamics states that the total energy of a system plus its environment remains constant?
First law of thermodynamics
In a food chain, where does the energy from the sun go after being transferred to plants through photosynthesis?
It passes from one organism to another as they are consumed
Which law of thermodynamics states that during every energy transfer or transformation, some energy becomes unusable and is often lost as heat?
Second law of thermodynamics
What does entropy measure in a system?
The amount of order or disorder
What is Gibbs free energy used to determine in a chemical reaction?
Whether the reaction occurs spontaneously or non-spontaneously
What is the equation for calculating Gibbs free energy?
$G = H - TS$
Which of the following is an example of an exergonic reaction?
Cellular respiration
What is the equation for Gibbs free energy?
G = H - TS
Which of the following is true about endothermic reactions?
They require an input of energy
What is the function of enzymes in chemical reactions?
To decrease the activation energy
Which of the following is true about enzyme-substrate association?
It is temporary
Which of the following is an example of a catabolic reaction?
Lipase breaking down lipids
Which law of thermodynamics states that the total energy of a system plus its environment remains constant?
First law of thermodynamics
Which one of the following best describes a closed thermodynamic system?
A system that cannot exchange matter or energy with its surroundings
What is the equation for calculating Gibbs free energy?
G = H - TS
What is the function of enzymes in metabolic pathways?
To increase the rate of chemical reactions
What does a negative enthalpy change indicate in a chemical reaction?
The reaction is exothermic
What is entropy?
A measure of the amount of order or disorder in a system
Which of the following best describes metabolism?
The sum of all reactions occurring in cells
What is the function of enzymes in metabolic pathways?
To catalyze specific chemical reactions
Which one of the following is an example of an anabolic reaction?
Building more complex organic molecules from smaller ones
What is the definition of potential energy?
Energy stored in an object due to its position or structure
Which one of the following best describes a closed thermodynamic system?
Energy can be exchanged, but matter stays within the system
Which one of the following is an example of a catabolic reaction?
The breakdown of large molecules into smaller ones
Which type of reaction combines smaller molecules to form larger, more complex molecules and requires energy?
Anabolic reactions
What is the main function of enzymes in metabolic pathways?
To catalyze each step in the pathway
Which one of the following best describes an open thermodynamic system?
Matter and energy can flow in and out of the system
What is the first law of thermodynamics?
Energy of the universe is constant and can be transferred or transformed but not created or destroyed
Which one of the following forms of energy is converted into chemical energy through photosynthesis?
Solar energy
What are the three types of thermodynamic systems?
Open, closed, and isolated
Which one of the following best describes Gibbs free energy?
Gibbs free energy is a measure of the energy available to do work.
Which one of the following best describes the role of enzymes in chemical reactions?
Enzymes lower the activation energy required for a reaction.
Which one of the following best explains enzyme specificity?
Enzymes can only bind to a specific substrate.
Which one of the following best describes the lock and key analogy for enzyme specificity?
The lock represents the substrate and the key represents the product.
Which one of the following is an example of a spontaneous process?
Ice melting
Which one of the following is an example of a non-spontaneous process?
Plants photosynthesizing
Test your knowledge on energy metabolism and enzymes with this quiz. Learn about metabolic pathways, catabolic and anabolic reactions, different forms of energy, thermodynamic systems, and the laws of thermodynamics. Challenge yourself and expand your understanding of metabolism and the energy of life.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
