EoY test Yr9 Review Flashcards
Name 2 pieces of labratory equipment the student could have used to prepare cells to view using the microscope.
Dye/Stain (Iodine)
Slide
Describe two differences between aerobic and anaerobic respriration in humans. (Do not refer to oxygen in your answer)
Aerobic respiration RELEASES more energy than anaerobic respiration.
Anaerobic resiration produces lactic acid, Aerobic respiration does not.
Amylase is an enzyme that breaks down starch. Amylase is a polymer of smaller molecules. Name the type of smaller molecules.
Amino Acids
Explain how amylase breaks down starch, amswer in terms of ‘lock and key theory’
- starch / substrate binds to active site
- shape of active site and substrate are complementary
- a chemical reaction occurs to produce smaller molecules
When writing control variables do you use volume or amound?
Volume
Explain the results as 5 degrees C and 80 degrees C
- starch is still present or starch has not been broken down
- at 5 °C amylase / starch / molecules have low (kinetic) energy
- there are fewer (enzyme-substrate) collisions
(allow fewer enzyme-substrate complexes are formed) - at 80 °C the amylase has been denatured
- the starch can no longer fit