quiz 2 Flashcards
Which enzyme breaks down starch?
amylase
Name the 2 factors that can cause an enzyme to become denatured
High or low pH, and high temperature
Where is bile made?
in the liver
Give 3 factors that can affect the rate of enzyme action
temperature, pH and concentration
Explain why the rate of reactions involving enzymes decreases at non-optimum pHs
Enzyme is denatured, so the shape of its active site is permanently changed, so it cant bind to its substrates, so no digestion can occur
What is the optimum temperature of most human enzymes
37 degrees celsius
What are 2 main types of lipids
fats and oils
Describe the effect of pH on the rate of enzyme activity
Rate of enzyme action increases until the optimum pH is reached than decreases
Define chemical digestion
Any digestion by enzymes
What happens when bile emulsifies fats?
fats turned from large droplets into smaller droplets
Explain why the rate of enzyme action decreases as temperature increases after the optimum temperature
Enzyme denatures, so the shape of its active site is permanently changed, so it cant bind to its substrates, so no digestion reaction can occur
Describe the effect of tempreature on the rate of enzyme action
rate of enzyme action increases until optimum tempreature and then decreases
In the human body where does mechanical digestion takes place?
mouth,stomach
Explain why the rate of enzyme action increases as temperature increases until the optimum temperature
substrate and enzyme particles have more energy in their kinetic stores, so they move faster and collide more frequently,so more digestion reaction happens
What does amalyse digest and what is the product?
starch is digested in glucose
