Turn on thread page Beta
    • Thread Starter
    Offline

    20
    ReputationRep:
    I know the answer is A for this question but why is that? I am really struggling to know
    Name:  Screenshot_19.png
Views: 32
Size:  63.3 KB
    Offline

    10
    ReputationRep:
    So let's break it down
    It can't be C, because amylase breaks down starch into glucose - the iodine test will only be positive if starch is present.

    Cytoplasms contain proteins. Which are too large to diffuse out of the plasma membrane. So the extra cellular fluid won't show up proteins in a biuret test, but the cytoplasm will. So it cannot be B.

    Finally. Starch is broken down by amylase into glucose. Glucose moves from high concentration to low concentration, so out of the cytoplasm, into the extra cellular fluid. Therefore, the extracellular fluid will test positive for the Benedictus test.
    Hope this helps!
    Posted on the TSR App. Download from Apple or Google Play
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 28, 2018

University open days

  1. Norwich University of the Arts
    Postgraduate Open Days Postgraduate
    Thu, 19 Jul '18
  2. University of Sunderland
    Postgraduate Open Day Postgraduate
    Thu, 19 Jul '18
  3. Plymouth College of Art
    All MA Programmes Postgraduate
    Thu, 19 Jul '18
Poll
Is the Big Bang theory correct?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.