Biology 1: 2-2
A substance that forms as a result of a chemical reaction
product
substance that forms as the result of a chemical reaction
product
An enzyme is a
protein
A substance that exists before a chemical reaction occurs
reactant
starting material in a chemical reaction
reactant
In a chemical reaction the _____________ are the starting compounds used to create the products.
reactants
Activities of enzymes depend on
temperature, pH, ionic conditions
A chemical reaction that releases heat is an exothermic reaction.
true
Activation energy is the energy required to start a chemical reaction.
true
An enzyme speeds up a reaction by lowering the activation energy required.
true
Biochemical reactions take place inside of cells.
true
During a chemical reaction, some bonds break and new bonds form.
true
In a chemical reaction, the quantity of each element does not change.
true
Metabolism is the sum of all chemical reactions in an organism.
true
Most biochemical reactions need help, usually from an enzyme, to get started.
true
Understanding chemistry is needed to fully understand the processes within the cell.
true
________________ reactions take place inside the cells of living things.
biochemical
Reactions that take place inside cells are
biochemical reactions
In a chemical reaction _______________ are created and destroyed.
bonds
exothermic reaction in organisms
catabolic reaction
exothermic reactions in organisms
catabolic reaction
chemical reaction that absorbs energy
endothermic reaction
A protein that helps speed up a biochemical reaction
enzyme
Another name for biological catalyst could be a(n)
enzyme
protein that speeds up biochemical reactions
enzyme
_________________ make it easier for a chemical reaction to occur by lowering the activation energy.
enzymes
___________________ reactions are sometimes called catabolic reactions.
exothermic
What is the main difference between an endothermic reaction and exothermic reaction?
exothermic gives off energy and endothermic absorbs energy
Only some chemical reactions need energy to get started.
false
Exothermic reactions often release energy in the form of ___________ or light.
heat
Sum of all the biochemical reactions in an organism
metabolism
________________ is the sum of all biochemical reactions in an organism.
metabolism
sum of all the biochemical reactions in an organism
metabolism
endothermic reactions in organisms
anabolic reaction
The energy required to begin a chemical reaction is called _____________ energy.
activation
The "push" needed to start a chemical reaction is the
activation energy
The energy needed to start a chemical reaction
activation energy
energy needed to start a chemical reaction
activation energy
_____________ reactions create large molecules by combining smaller ones together. Such as building proteins from amino acids.
anabolic
A chemical reaction must follow the Law of the Conservation of ____________, meaning the total number of atoms before and after the reaction remains the same.
Mass
Represents a chemical reaction
chemical equation
A process that changes some chemical substance into others
chemical reaction
Matter is always conserved.
true
The joining of amino acids to form a protein is a(n)
anabolic reaction
endothermic reaction in organisms
anabolic reaction
chemical reaction that occurs inside the cells of living things
biochemical reaction
chemical reactions that take place in the cells of living things
biochemical reaction
chemical reaction that releases energy
exothermic reaction
A chemical reaction that releases energy is ________________, while one that absorbs energy is _____________.
exothermic, endothermic
A substance that forms as a result of a chemical reaction is called a reactant.
false
Anabolic reactions give off energy.
false
In a chemical reaction, the quantity of an element may change.
false
In chemical reaction, the number of atoms on one side of the arrow may differ from the number of atoms on the other side of the arrow.
false