Lab 5 Flashcards
Input of energy required for a chemical reaction to occur
Activation energy
Activation energy is greater than the energy produced by the reaction
Endergonic
Activation energy is less than the energy produced by the reaction
Exergonic
Catalysts produced by cells to catalyze the chemical reactions that occur within the cells
Enzymes
Proteins composed of amino acids linked together by peptide bonds to form polypeptide chains
Enzymes
Amino acids linked together by peptide bonds to form
Polypeptide chains
A specific substance (reactant) on which an enzyme acts
Substrate
Where the substrate binds with the enzyme
Active site
Enzyme obtained from potato
Catalase
Catalase catalyze the breakdown of hydrogen peroxide into
Water and oxygen
Enzyme that digests starch vía hydrolysis into glucose and maltose
Amylase
Which of the four types of organic molecules are enzymes?
Proteins
speed up the rate of chemical reactions by lowering the activation energy
catalysts
examples of catalysts
catalase (from potato cells) amylase (digests starch)
Explain how a substrate/reactant enters the active site of an enzyme and exits as the product.
substrate binds with enzyme at its active site and is catalyzed then released as products
as long as there is a substrate…
product will be made
catalyzes the breakdown of hydrogen peroxide into water and oxygen
catalase
digests starch via hydrolysis into glucose and maltose (a disaccharide composed of two glucose molecules)
amylase
2h202->2h20+02 What is the substrate (reactant), enzyme, and product for each of the chemical reactions?
substrate: 2h202
enzyme: catalase
product: 2h20+02
What is catalase’s substrate? How could you tell? What did you measure to determine activity?
hydrogen peroxide. only content that produced bubbles. tested by bubble height
Explain how increasing or decreasing the amount of enzyme affects reaction speed.
more enzyme = faster reaction
Explain how increasing or decreasing the amount of substrate affects product production.
more substrate = more product
reaction amylase catalyzes
starch -> reducing sugars
Describe what will happen if when salivary amylase mixes with starch.
iodine: turns purple, starch is present
benedicts: turns orange reducing sugar is present
A POSITIVE REACTION WILL OCCUR
