Why does an increase in temperature cause more betalain to be released from fresh beetroot tissue in a quicker time?

  • 1 vote

Beetroot cells contain the red pigment betalain. We put the same amount of beetroot caell in different temperatures of water and the hotter temperatures cause more betalain to be released causeing the warmer water to be a stronger red colour. Why does an increase in temperature cause more betalain to be released from fresh beetroot tissue in a quicker time?

Posted Wed 31st October, 2012 @ 20:36 by Eleanor,

5 Answers

  • 2 votes

It is because of the cell-surface membrane of the beetroot. The fatty acid tails of the phospholipid bilayer can melt at higher temperatures meaning they become more fluid and allow more movement. This affects the permeability of the cell which may allow molecules into/out of the cell.

Answered Thu 1st November, 2012 @ 11:54 by Former Member
  • 1 vote

1) The increase in temperature means the betalain molecules have increased energy so move around faster increasing the rate of diffusion through the membrane wall. 

2) The fluid mosaic - phospho-lipid bilayer also beomces more permeable as weak hydrogen bonds are roken by indreased temperature.

sorry i couldnt give more detail,can still remeber this question but it was like a year ago :/

Answered Thu 1st November, 2012 @ 13:41 by Edward Pinches
  • 0 votes

Is this for coursework? Because I did a practice one today which was the effect of ethanol on beetroot and how it releases more betalain at higher concentrations.

Answered Thu 1st November, 2012 @ 17:18 by Joanne
  • 0 votes

The higher the temperature the more kinetic energy the particles have so the phospholipids move faster which results in temporary gaps in the membrane so the pigment molecules can pass through and the membrane normally holds the pigments so it has become more permeable due to the increase in temperature. So basically, the particles have more kinetic energy, they move more, there are more gaps, more stuff gets through :-) I know it's abit late, sorry!

Answered Wed 16th January, 2013 @ 17:48 by Amnah Anjum
  • 0 votes

If anyone needs help with cell membranes then I have revision notes for OCR on my resources. Good luck for the exam guys!

Answered Fri 12th April, 2013 @ 23:16 by Bethany Cunningham