2020 wrong

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

maintains a conc gradient of na
na move in by FD bringing glucose with it

Question 2

Describe the role of micelles in the absorption of fats into the cells lining the ileum

Answer 2

micelles include bile salts and fatty acids
make fatty acids more soluble in water
carry fatty acids to cell lining
maintaining a high conc of fatty acids to cell lining
fatty acids absorbed by diffusion

Question 3

Describe a method this student could use to prepare colour standards and use them
to give data for the total anthocyanin extracted.

Answer 3

known conc of extract used
prep dilution series
compare results with colour standards to give conc

Question 4

Define ‘non-coding base sequences’ and describe where the non-coding multiple
repeats are positioned in the genome.

Answer 4

dna that doesnt code for a protein
positioned between genes

Question 5

why would a data logger be used

Answer 5

To increase accuracy because differences are small
To increase accuracy because reduces risk of human error