Biology 9700/22 — February/March 2021
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Immunity · Biological Molecules · Nucleic Acids and Protein Synthesis · Infectious Diseases · Gas Exchange · Enzymes · +5 more
Fig. 1.1 is an image of a transverse section through the trachea of the gas exchange system.
Write the names of structures X and Y on Fig. 1.1 in the boxes provided.
The perichondrium contains collagen fibres, composed of collagen molecules.
Collagen is an example of one type of biological molecule.
State the name of the type of biological molecule of which collagen is an example.
Some structures in the gas exchange system are listed in alphabetical order in Table 1.1.
• Write YES in the box provided if the structure contains smooth muscle.
• Write NO in the box provided if the structure does not contain smooth muscle.
Table 1.1
| structure | |
|---|---|
| alveolus | |
| bronchiole | |
| bronchus | |
| trachea |
The rest of this paper
5 more questions- Q2Nucleic Acids and Protein Synthesis · Biological Molecules · Enzymes14M
- Q3Immunity · Cell Structure · Cell Membranes and Transport9M
- Q4Transport in Mammals · Immunity · Infectious Diseases11M
- Q5The Mitotic Cell Cycle · Transport in Plants10M
- Q6Infectious Diseases · Nucleic Acids and Protein Synthesis · Immunity12M