IMAT 2019 Q32 Biology Beetroot Q

Practice Question Solving
1

I was wondering if anyone had the same ideas as me while solving this question.

  • In 20 degrees C water, both P Q should not turn red or denature protein and dissolve phospholipid. So eliminate row 1, 4, and 5.
  • Lipids readily dissolve in ethanol allowing phospholipids to dissolve - turning liquid P red
  • Dilute HCl denature protein by creating an acidic environment - turning liquid P red
    Therefore the answer is E, row 3.

I did look to see if row 2 could be an answer as well but haven’t gotten any clear answers yet if anyone can tell me why it can’t be an answer that would be greatly appreciated.

3

Sorry - didn’t know how to crop pictures on macbook but here it is

2019 Q32
2019 Q321312×1426 88.3 KB

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4

Hey, just checked the answer sheet and E is correct :slight_smile: :+1:t2:

5

thanks for that but I was wondering if anyone came to the same conclusion according to how I solved the problem

6

I did, I think the logic checks out, though admittedly when I answered it I went straight for the dilute HCl denaturing protein for liquid Q so got to row 3 straight away

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