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Ch 6
Energy
58
Biology
Undergraduate 1
04/08/2011

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Cards

Term
In a milk experiment if you had added more substrates(reactants) the amount of products would?
Definition
Increase
Term
An inhibitor of an enzyme will ____ the products formed per unit time?
Definition
Decrease
Term
Inhibitor
Definition
Prevents enzymes from speeding up reaction
Term
In photosynthesis what happens to CO2?
Definition
Reduced
Term
In Cell Respiration what happens to Oxygen?
Definition
Reduced
Term
A ball moving downhill possesses what type of energy?
Definition
Kinetic
Term
According to the second law of thermodynamics every energy conversion will do what to the entropy of the universe?
Definition
Increase
Term
Which reaction occurs spontaneously?
Definition
Exergonic
Term
What do enzymes do to the activation energy?
Definition
Decrease it
Term
When proteins are digested and broken down into subunits of amino acids energy is_____ because hydrolysis is an _____ reaction?
Definition
Released: Exergonic
Term
In Hydrolysis what happens to energy?
Definition
It is always released
Term
ATP is a nucleotide that has a base called? which is connected to a sugar called? which is connected to how many phosphate groups?
Definition
Adenine: Ribose: 3
Term
Energy
Definition
The ability to do work
Term
Name three types of organisms that are capable of photosynthesis.
Definition
Plants, Algae, some bacteria
Term
Kinetic energy
Definition
Energy of Motion
Term
Potential energy
Definition
Stored Energy
Term
Chemical energy
Definition
Specific type of Potential energy such as food.
Term
Mechanical energy
Definition
Form of kinetic energy converted from chemical energy example: moving muscles
Term
Energy flows in a system and is not reused because every reaction in organisms result in a loss of?
Definition
Heat
Term
The first law of thermodynamics(Law of conservation of Energy)?
Definition
Energy can not be created nor destroyed but can be changed from one form to another.
Term
What are two examples of reactions that convert energy?
Definition
Photosynthesis and Cellular respiration.
Term
State the Second Law of Thermodynamics
Definition
Energy cannot be changed from one form to another without the loss of useable energy.
Term
What is Entropy?
Definition
Indicates relative amounts of disorganization
Term
Every energy transformation will do what to the total entropy of the universe?
Definition
Increase
Term
Would an organized system have a low or high entropy?
Definition
Low
Term
Would a disordered system have low or high entropy?
Definition
High
Term
Metabolism
Definition
Sum of all chemical reactions that occur in a cell.
Term
Free Energy
Definition
Amt. of energy still available after a chemical reaction has occurred.
Term
In a reaction if energy is released then the products will have less free energy than the reactants. Is this a negative or positive result?
Definition
Negative
Term
What type of reaction is an exergonic reaction?
Definition
Hydrolysis reaction
Term
Hydrolysis reaction
Definition
breaking down a large molecule
Term
What type of reaction is an endergonic reaction?
Definition
Dehydration Reaction
Term
Dehydration Reaction
Definition
Making a large molecule
Term
What is the dehydration reaction for making ATP?
Definition
ADP+ phosphate= ATP+ H2O
Term
Is the breakdown of ATP endergonic or exergonic? Would energy be released or required?
Definition
Exergonic: released
Term
What happens to the energy in a coupled reaction?
Definition
Energy released in exergonic reaction is used in the endergonic reaction.
Term
Metabolic Pathway
Definition
Series of linked reactions: one reaction leads to another
Term
Energy of activation
Definition
Initial energy needed for molecules to begin colliding and reacting
Term
How do enzymes affect the activation energy?
Definition
Lower the amts. of energy required for activation to occur.
Term
How do enzymes allow reactions to occur in mild conditions?
Definition
Bringing reactants into contact with eachother.
Term
Reactants in a reaction are called?
Definition
Substrates
Term
What part of the enzyme binds with the substrate?
Definition
Active site
Term
Regulation of Metabolism
Definition
Presence of specific enzyme determines which product is formed in a metabolic pathway.
Term
Reaction rate
Definition
Amt. of product formed per unit time.
Term
What happens to enzymes during extreme temperatures?
Definition
Denaturing
Term
In noncompetitive inhibition the inhibitor binds to the enzymes?
Definition
Allosteric Site
Term
In competitive inhibition the substrate and inhibitor fight for binding to the enzymes?
Definition
Active Site
Term
In which organelle does photosynthesis occur?
Definition
Chloroplast
Term
In which organelle does Cellular Respiration occur?
Definition
Mitochondria
Term
Endergonic reactions ___ occur spontaneously; they happen because there is always an input of ____?
Definition
Do not: Energy
Term
when glucose is not being used it possesses ___ energy?
Definition
Potential
Term
A competitive inhibitor____ products formed when it prevents the substrate enzyme complex by bonding at the ____ of the enzyme.
Definition
Decreases: active site
Term
In a coupled reaction the energy released in an ______ reaction is used in the _____ reaction.
Definition
Exergonic: Endergonic
Term
Does competitive inhibition form a product?
Definition
No
Term
Does Noncompetitive inhibition form a product?
Definition
No
Term
Which has more energy in a Endergonic reaction, reactants or products?
Definition
Products
Term
In an Endergonic reaction are the reactants more or less organized than the products?
Definition
Less
Term
In an endergonic reactiont do the reactants have more or less entropy than the products?
Definition
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