Question

(a) Fig. 1.1 is a diagram of a plant cell.

(i) Identify the letter from Fig. 1.1 that represents the part of the plant cell:

where photosynthesis occurs ………………………………………………………………………………..
where the genetic material is found ……………………………………………………………………….
that controls what substances enter the cell ……………………………………………………………

(ii) State the name of the part labelled B in Fig. 1.1.

…………………………………………………………………………………………………………………….
(iii) State the name of two structures in plant cells that are not found in animal cells.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
(b) A student immerses pieces of potato in different concentrations of sucrose solution for 5 minutes.
The student measures the length of the potato before and after immersion.
Table 1.1 is a summary of the results.

(i) Use Table 1.1 to calculate the change in length of the potato when it is placed in the 0.4mol/dm$^{3}$ sucrose solution.
……………………………………………………………………………………………………………… mm 

(ii) Complete the sentences to describe and explain the results in Table 1.1.

The potato with the smallest change in length has been immersed in a sucrose solution

with a concentration of ………………………………….. mol/dm$^{3}$.
The potato immersed in 0.8mol/dm$^{3}$ sucrose solution changed by ……………………….. mm in length.
The potato immersed in 0.2mol/dm$^{3}$ sucrose solution increases in length because water

is absorbed by the potato cells by the process of ………………………………….. .