User interface language: English | Español

Date November 2016 Marks available 1 Reference code 16N.3.SL.TZ0.3
Level Standard level Paper Paper 3 Time zone TZ0 / no time zone
Command term Identify Question number 3 Adapted from N/A

Question

The micrograph shows a section of an organ in the human body.

State from which organ the section was taken.

[1]
a.

Identify the layer of tissue found at X.

[1]
b.

The actual length of the structure labelled Y is 0.8 mm between the two black lines. Calculate the magnification of the micrograph. Working should be shown.

[2]
c.

Markscheme

small intestine

Do not accept villi/villus or intestine alone.

 

 

 

 

a.

epithelium

Do not accept microvilli/brush border.

 

 

 

 

b.

a. calculation shown with accurate measurement of length of villus

OR

53 0.8 or  54 0.8 or  55 0.8 «mm»

For the first marking point to be awarded, the measurement must be between 53 and 55 mm.

b. 67 or 68 or 68

Allow any value between 67 and 69 inclusive.
Accept decimals e.g. 68.75.
Allow ECF from first marking point.

 

c.

Examiners report

[N/A]
a.
[N/A]
b.
[N/A]
c.

Syllabus sections

Core » Topic 1: Cell biology » 1.2 Ultrastructure of cells
Show 53 related questions
Core » Topic 1: Cell biology
Core

View options