DP Chemistry (last assessment 2024)

Test builder »

Question 18N.3.hl.TZ0.c.i

Select a Test
Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.hl.TZ0.c.i
Level hl Paper 3 Time zone TZ0
Command term Outline Question number c.i Adapted from N/A
c.i.
[Maximum mark: 1]
18N.3.hl.TZ0.c.i

Lactose, found in milk and dairy products, is a disaccharide formed from two different monosaccharides. The structure of lactose is shown with numbered carbon atoms.

Starch and cellulose are both formed from glucose and have similar structures.

Outline the difference between their structures.

[1]

Markscheme

Starch: α«-glucose/links»

AND

Cellulose: β«-glucose/links» ✔

 

Accept “Starch: coiled/spiral structure OR cross-links AND Cellulose: uncoiled OR straight chains/linear polymer OR no/few cross-links”.

Syllabus sections