2019

• A

  
• D

  
• B

  
• D

  
• 
  

  B

  60: 36

  15: 9 (divided by 4)

  5: 3 (divided by 3)

  
• C

  
• A

  
• (i) cell membrane controls what substances enters and exit the cell. it is described as being semi permeable

  (ii) cytoplasm

  
• (i) 250 + 330 + 275 = 855 ÷ 3 = 285

  (ii) because they require more energy

  
• diffusion

  
• proteins

  
• cellulose

  
• substrate

  
• S ---> pyruvate

  T ---> water

  
• oxygen