U2T6 – Membrane Structure

Which part is hydrophobic?

Name molecule J (Spell it correctly)

Which part is hydrophilic?

What name describes the double layered structure of a membrane? (Spell it correctly)

Name the part of molecule J, which makes up part B.

Which molecule makes up part D?

Name structure E.

What substance will structure C be made out of?

Name structure G.

Name molecule I.

Which molecules are found in A?

What type of molecules are most likely to pass through C?

Give an example of a molecule which would pass through F

What effect does having more of molecule 'I' have on the membrane?

Beetroot is a purple vegetable, the cells of which contain a pigment called Betalain. 4 tubes are set up with water and beetroot incubated at different temperatures: 20, 40, 60 and 80 ⁰C. What is the dependent variable of this experiment?

Beetroot is a purple vegetable, the cells of which contain a pigment called Betalain. 4 tubes are set up with water and beetroot incubated at different temperatures: 20, 40, 60 and 80 ⁰C. which tube would you predict shows beetroot incubated at 20 ⁰C?

What piece of equipment can you use to measure the colour change? (spell it correctly)

Why can more pigment leak out across the plasma membrane at a higher temperature (80⁰C) ?

In this version of required practical 4, 1cm beetroot cores are soaked in different concentrations of ethanol - 0%, 10%, 20%and 30%. Which graph represents the expected results ?

Which is the best explanation for the effect of ethanol on membrane permeability?