transport across membranes exam qs

Question 1

The movement of Na+ out of the cell allows the absorption of glucose into
the cell lining the ileum. Explain how

Answer 1

generates a concentration gradient for Na+
Na+ moving (in) by facilitated diffusion, brings glucose with it

Question 2

Suggest how the increase in temperature of the water caused the release
of the red pigment.

Answer 2

Damage to (cell surface) membrane;
2. (membrane) proteins denature;
3. Increased fluidity

Question 3

A different student did this investigation. He did not have a colorimeter.
Describe a method this student could use to prepare colour standards and use them to give
data for the total anthocyanin extracted.

Answer 3

Use known concentration of blueberry juice
2. Prepare dilution series;
3. Compare (results) with colour standards to give value