Haringey Sixth Form Centre
Science Department


October Biology Mock Exam


Name: A. Student




Duration: One hour



Mar...
X
X
    X
    X
        X
The shape of the thing is changed so that it is the same
as the shape of the enzyme and can now attach
Enalapril is a competitive inhibitor, as the concentration
of the substrate increases there is still an increase in
reacti...
Hydrolysis




               22



Sucrose is not a reducing sugar so I
could do the benedicts test and look for
colour c...
22

The increased temperature provided
additional starting energy for the
reaction to begin with
The reaction can’t go any faster




 They have the same shape so it will
 bind to the active site and prevent
 ethanol fr...
C12H22012




In the healthy man the lactose has been
broken down (hydrolysed) by the enzyme
lactase to glucose and galact...
In the man with lactose intolerance he
either has no lactase or it is not working
properly so the lactose isn’t hydrolysed...
Large molecule
     the larger the molecule the more
     energy it can store
     Compact
     The more compact the molec...
Different colours




     Villi
Hydrolysis




Peptide
Hydrogen




End of the test!
C12 H 22 O 11
 
   
   
   
   
   
   (2)
Biology Homework Mark The Mock
Biology Homework Mark The Mock
Biology Homework Mark The Mock
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Biology Homework Mark The Mock

  1. 1. Haringey Sixth Form Centre Science Department October Biology Mock Exam Name: A. Student Duration: One hour Marks out of 50 /50 You will need: Pencil, Ruler, Pen, Calculator
  2. 2. X X X X X
  3. 3. The shape of the thing is changed so that it is the same as the shape of the enzyme and can now attach
  4. 4. Enalapril is a competitive inhibitor, as the concentration of the substrate increases there is still an increase in reaction, so it must be competing rather than changing the enzymes active site For most normal reactions an increase in temperature leads to an increase in reaction rate because of the increased energy within the reaction, additional heal means more collisions of molecules. This is only half of the story for enzyme reactions. At low temperatures there is little enzyme action, this could be down to few collisions and little energy in the reaction media. There is an increase at around body temperature but then there is a drop off in productivity. This is because enzymes are denatured (loss of tertiary structure) at extreme temperatures as the bonds between the polypeptide weaken and break. This change in active site shape means fewer reactions take place
  5. 5. Hydrolysis 22 Sucrose is not a reducing sugar so I could do the benedicts test and look for colour change
  6. 6. 22 The increased temperature provided additional starting energy for the reaction to begin with
  7. 7. The reaction can’t go any faster They have the same shape so it will bind to the active site and prevent ethanol from binding - competitive inhibition
  8. 8. C12H22012 In the healthy man the lactose has been broken down (hydrolysed) by the enzyme lactase to glucose and galactose so over time the concentration of glucose in the blood will increase as this is digested
  9. 9. In the man with lactose intolerance he either has no lactase or it is not working properly so the lactose isn’t hydrolysed to glucose and galactose and there is no increase of glucose in the blood Polypeptides Peptide bond
  10. 10. Large molecule the larger the molecule the more energy it can store Compact The more compact the molecule the more it can be stored Because the muscles need energy Biuret Benedicts
  11. 11. Different colours Villi
  12. 12. Hydrolysis Peptide
  13. 13. Hydrogen End of the test!
  14. 14. C12 H 22 O 11 (2)

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