SULIT 4551 SECTION B 1. Diagram 1.1 shows human’s cheek cell observed through an electron microscope. Diagram 1.1 (a) (i) Name the structure labeled P and Q . P : …………………………………………………………………………………. Q : ………………………………………………………………………………… [2 marks] (ii) P and Q involve in the process of enzyme synthesis. State the roles of P and Q in this process. P-……………………………………………………………………………………………. ……………………………………………………………………………………………. Q-…………………………………………………………………………………………… ……………………………………………………………………………………………. [2 marks] (b) (i) Cheek cell and onion epidermal cells are observed under light microscope. Draw a labeled diagram of an onion epidermal cell observed under the light microscope. 4551 Lihat Sebelah SULIT 7
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SULIT 4551
SECTION B1. Diagram 1.1 shows human’s cheek cell observed through an electron microscope.
Diagram 1.1
(a) (i) Name the structure labeled P and Q .
P : ………………………………………………………………………………….
Q : …………………………………………………………………………………
[2 marks]
(ii) P and Q involve in the process of enzyme synthesis. State the roles of P and Q
in this process.
P-…………………………………………………………………………………………….
…………………………………………………………………………………………….
Q-……………………………………………………………………………………………
…………………………………………………………………………………………….
[2 marks]
(b) (i) Cheek cell and onion epidermal cells are observed under light microscope.
Draw a labeled diagram of an onion epidermal cell observed under the light
microscope.
[2 marks]
4551 Lihat SebelahSULIT
7
SULIT 4551
(ii) State two differences in structure between a cheek cell and an onion epidermal
cell that is observed under the microscope.
…………………………………………………………………………………………….
…………………………………………………………………………………………….
[2 mark]
(c) If structure R is removed from a cell. Explain what would happen to the growth of
the cell.
…………………………………………………………………………………………….
…………………………………………………………………………………………….
……………………………………………………………………………………………
……………………………………………………………………………………………
[2 marks]
(d) Explain why meristematic cells have more organelle S compared to cheek cells.
……………………………………………………………………………………….……
…………………………………………………………………………………………….
…………………………………………………………………………………………….
…………………………………………………………………………………………….
[2 marks]
2. Diagram 2.1 shows the organelles in an animal cell that involved in the synthesis and secretion of protein P molecule.
(c) The temperature which sucrase reaction take place is increased to more 60°C. State the effect on the quantity of the product. Explain your answer.……………………………………………………………………..........…………….