Biology 9700/22 — May/June 2013
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Cell Structure · Infectious Diseases · Immunity · The Mitotic Cell Cycle · Transport in Plants · Gas Exchange · +5 more
The cells in Fig. 1.1 are from the same organism and look the same. The cells in Fig. 1.1(a) have been produced by mitosis and the cells in Fig. 1.1(b) have been produced by meiosis.
Complete the table to show two differences between cells that have been produced by mitosis compared to cells that have been produced by meiosis.
| mitosis | meiosis |
|---|---|
Explain why the organism produces cells by meiosis.
Fig. 1.2 is a transmission electron micrograph of a dividing cancer cell.
Calculate the actual width of the cell shown in Fig. 1.2 at X-Y.
Show your working and give your answer to the nearest micrometre ().
answer = ______
The cancer cell shown in Fig. 1.2 has more mitochondria and rough endoplasmic reticula (RER) compared to the non-cancerous cell from which it originated.
Suggest why this is so.
The rest of this paper
5 more questions- Q2Transport in Plants · Cell Structure7M
- Q3Infectious Diseases · Gas Exchange · Immunity14M
- Q4Biological Molecules · Cell Membranes and Transport · Enzymes16M
- Q5Nucleic Acids and Protein Synthesis · Immunity · Infectious Diseases10M
- Q6Transport in Mammals5M