Biology Unit 2 Quiz 3

reversible

simultaneous decomposition and synthesis

decomposition

A(n) _______________________________________ reaction occurs when ionic or covalent bonds are broken and elements, ions, or simpler molecules are formed.

catalyst

Accelerates a chemical reaction without being used up in the reaction

metabolism

All of the chemical reactions in the organism for maintenance of the processes of life

forward reaction rate equals reverse reaction rate

Chemical equilibrium results if: forward reaction rate equals reverse reaction rate more reactants are added all reactants are used up some products are removed

False

Chemical reactions will occur independently of the reactant's temperature. True False

reactants products elements or molecules

Explain the meaning of the symbols as they are used in this expression. A+B yield C+D. C and D are: elements only reactants products molecules only elements or molecules

are not

Explain the meaning of the symbols as they are used in this expression. A+B yield C+D. + means that the substances _________________ chemically combined.

products reactants elements or molecules

Explain the meaning of the symbols as they are used in this expression. A+B yield C+D. A and B are: molecules only products reactants elements only elements or molecules

friction

In the chemical reaction that takes place in the lighting of a match, activation energy is supplied by ______________________. friction chemicals in the match

more L and H will be produced

In the reaction B + KL + H, if an additional B is added, the result will be: more L will be required more L and H will be produced more K will be produced the reaction will slow down

exchange

A(n) __________________________ reaction occurs when the bonds of the reacting compounds are broken and new combinations are formed.

reversible

A(n) ___________________________ reaction occurs when the reactants are reproduced by reaction of the products.

synthesis

A(n) ____________________________ reaction occurs when a molecule is formed from the bonding of atoms, ions or simpler molecules.

exchange reaction

A chemical reaction where the substrates trade constituent parts

False

A plant must supply energy through photosynthesis in order for its complex starch molecules to breakdown to a simple sugar. True False

enzyme

A protein molecule which speeds up a specific chemical reaction in biological systems

reactant

A substance which enters into a chemical reaction is called a _____________________

product

A substance which results from a one-way chemical reaction is called a _______________________

buffer

A substance which will resist changes in pH within reasonable limits

product

That which is produced as a result of a chemical reaction

reversible

The arrows in the image define the equation as ________________________. A+B yield C+D. synthesis reversible decomposition exchange

decomposition

The compound is broken into its constituent parts

Law of Mass Action

The concentration of reactant product influences the rate and net direction of a reversible reaction

activation energy

The energy required to start a chemical reaction

metabolism

The process by which organisms decompose food and synthesize energy and tissue is _______________________________________

reversible

The products and reactants of a(n) _________________________ reaction will form at the same rate when equilibrium is attained. decomposition exchange synthesis reversible

Law of Mass action or molecular concentration because they relate to the same principle

The rate and direction of reactions are greatly influenced by the: molecular concentration only Law of Mass action or molecular concentration because they relate to the same principle neither Law of Mass action only

reversible reaction

The reactants used to form the products can also be synthesized from those products

B is removed and H is added

The reaction B + KL + H will quicken from right to left if: B is added and K is removed B is removed and H is added B is added and L is removed B is removed and K is added

synthesis reaction

Two or more units are added together to form a new compound

energy input

What is required for reactants to form bonds? energy input equilibrium exchange reaction energy output

a compound partitions into its components

What occurs during a decomposition reaction? a compound partitions into its components the components of several molecules recombine to form new molecules new compounds are formed by chemical bonding

chemical equilibrium

When a reversible reaction is occurring in both directions at the same rate

True

When fats decompose in an organism, energy is released. True False

all of the above

Which processes are involved in metabolism? synthesis, growth, repair decomposition, energy release reversible reactions, equilibrium synthesis and decomposition exchange reactions, control of pH all of the above

reversible

Which type of reaction is dependent on the concentration of the products and reactants? decomposition reversible exchange synthesis

decomposition

bonds broken and elements released

synthesis

molecules formed from components

exchange

molecules rearrange and form new molecules