EoY test Yr9 Review Flashcards

1
Q

Name 2 pieces of labratory equipment the student could have used to prepare cells to view using the microscope.

A

Dye/Stain (Iodine)
Slide

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2
Q

Describe two differences between aerobic and anaerobic respriration in humans. (Do not refer to oxygen in your answer)

A

Aerobic respiration RELEASES more energy than anaerobic respiration.
Anaerobic resiration produces lactic acid, Aerobic respiration does not.

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3
Q

Amylase is an enzyme that breaks down starch. Amylase is a polymer of smaller molecules. Name the type of smaller molecules.

A

Amino Acids

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4
Q

Explain how amylase breaks down starch, amswer in terms of ‘lock and key theory’

A
  • starch / substrate binds to active site
  • shape of active site and substrate are complementary
  • a chemical reaction occurs to produce smaller molecules
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5
Q

When writing control variables do you use volume or amound?

A

Volume

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6
Q

Explain the results as 5 degrees C and 80 degrees C

A
  • 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
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