physiology chapter 4 assignment
green gear shows __________ reactions
endergonic (products <- reactants)
Reactions that release energy are called __________ reactions.
exergonic
Slightly different forms of an enzyme found in different organs are called _________
isoenzymes
How often can a sucrase molecule be used to hydrolyze sucrose?
many times
Where is sucrase found in the human body?
microvilli of the small intestine
The active site is a binding site for which of the following?
substrates
Which of the following correctly represents the mechanism of enzyme function (S = substrate, P = product, E = enzyme)?
E + S -> E - S -> E - P -> E + P
How does sucrose change the configuration of sucrase?
Sucrose binds to its active site on sucrase, changing the shape of sucrase enzyme.
The function of sucrase is to ________.
break sucrose into glucose and fructose
blue gears show _________ reactions
exergonic (reactants -> product)
T/F: An enzyme can only bind one substrate at a time.
false
T/F: An enzyme speeds up a chemical reaction in the cell, but can only be used once.
false
ATP is able to store and release large amounts of energy because of its ________.
high energy bond to the third phosphate group and its ability to couple to exergonic and endergonic reactions
Consider the following reversible reaction: CO2 + H2O <--> H2CO3. In which direction (right or left) will the reaction proceed if the CO2 concentration in the blood is reduced?
left
Which type of organic compound are enzymes?
proteins
The direction of reversible reactions depends on the __________ concentrations of the reactants and products.
relative