Biology 9700/22 — May/June 2019
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Cell Structure · Cell Membranes and Transport · Biological Molecules · Nucleic Acids and Protein Synthesis · Transport in Plants · Gas Exchange · +5 more
Fig. 1.1 is a photomicrograph of a low power image of part of the common sunflower, Helianthus annuus. Fig. 1.1 is a transverse section.
State, with a reason, whether Fig. 1.1 shows a section through the root or the stem of H. annuus.
Cell type A in Fig. 1.1 has a large central vacuole.
Suggest, with reasons, the role of the tissue formed by this type of cell.
Structure B in Fig. 1.1 contains phloem tissue and xylem tissue and other tissues that provide support.
Name structure B.
The actual length of structure B is .
State the actual length of structure B in .
When structure B is observed at a higher magnification, more detail of xylem vessel elements and phloem sieve tube elements can be seen.
Outline the differences in the structure of a xylem vessel element and a phloem sieve tube element.
The rest of this paper
5 more questions- Q2Gas Exchange · Biological Molecules · Cell Structure · Nucleic Acids and Protein Synthesis · Cell Membranes and Transport · The Mitotic Cell Cycle11M
- Q3Transport in Mammals · Immunity · Cell Membranes and Transport · Nucleic Acids and Protein Synthesis17M
- Q4Cell Structure · Infectious Diseases11M
- Q5Biological Molecules · Cell Membranes and Transport8M
- Q6Enzymes5M