Microbiology 2117 CHPT 8 Test Questions and
Answers 100% Correct
Metabolism
All the biochemical reactions taking place within an organism
Catabolic pathways
Hydrolyze bonds to break down large molecules
Anabolic pathways
Dehydrate bonds to build polymers from monomers
Exergonic
Releases energy
Endergonic
Energy trapped in bonds
Enzymes
Proteins acting as biological catalysts
Enzyme characteristics
Can often be identified by "-ase" ending of name
Examples of enzymes
polymerase, sucrase, transferase
Enzyme reuse
, Not changed during reaction; reusable
Enzyme speed
Act at speeds of 100 to 1 million reactions per second
Enzyme specificity
Highly specific in function
Active site
Pocket that interacts with substrates (reactants)
Enzyme-substrate complex
Active site of enzyme holds substrate(s) in a position favorable for reaction catalyzed
Hydrolysis in enzymes
Bond is stretched and weakened by the enzyme so it can be broken
Dehydration in enzymes
Molecules held by the enzyme such that they will collide and form a bond
Activation energy
Enzymes lower the activation energy needed for the reaction to proceed
Cofactors
Metal ions required by enzymes, e.g., Mg+2, Fe+2, Zn+2
Coenzymes
Answers 100% Correct
Metabolism
All the biochemical reactions taking place within an organism
Catabolic pathways
Hydrolyze bonds to break down large molecules
Anabolic pathways
Dehydrate bonds to build polymers from monomers
Exergonic
Releases energy
Endergonic
Energy trapped in bonds
Enzymes
Proteins acting as biological catalysts
Enzyme characteristics
Can often be identified by "-ase" ending of name
Examples of enzymes
polymerase, sucrase, transferase
Enzyme reuse
, Not changed during reaction; reusable
Enzyme speed
Act at speeds of 100 to 1 million reactions per second
Enzyme specificity
Highly specific in function
Active site
Pocket that interacts with substrates (reactants)
Enzyme-substrate complex
Active site of enzyme holds substrate(s) in a position favorable for reaction catalyzed
Hydrolysis in enzymes
Bond is stretched and weakened by the enzyme so it can be broken
Dehydration in enzymes
Molecules held by the enzyme such that they will collide and form a bond
Activation energy
Enzymes lower the activation energy needed for the reaction to proceed
Cofactors
Metal ions required by enzymes, e.g., Mg+2, Fe+2, Zn+2
Coenzymes
