2016年3月2日 星期三

F4 Bio Test 2 Ch3

F4 Biology Test 2:
The cell as the basic unit of life

A.     Multiple Choice (10marks)
Q.
1
2
3
4
5
6
7
8
9
10
Answer
D
C
B
B
B
D
C
D
A
C
Wrong no.











B     Conventional questions
1      (a)    A light microscope is cheaper than an electron microscope. /
Operation of a light microscope requires less training. /
                Preparation of the specimen for examination under a light microscope is easier / quicker.
                (any 2 or other correct answers)                                                                                      1×2
        (b)    The abnormal cells are larger than the normal cells. /
                The nuclei of the abnormal cells are larger than those of the normal cells. /
The abnormal cells have two nuclei whereas the normal cells have one.
(any 2 or other correct answers)                                                                                      1×2
(c)    To show the cell structures clearly.                                                                          1

2      (a)    X: It is the rough endoplasmic reticulum and is involved in the synthesis of proteins.    1
Y: It is the nucleus and it controls activities of the cell.                                                   1
Z: It is the mitochondrion and is the site where the energy-releasing stage of respiration takes
place.                                                                                                                       1
(b)    8 mm / 500 nm        = 16 000                                                                                          1×
(c)    Transmission electron microscope                                                                           1
        (d)    The images produced are of higher magnifications.                                                 1
The images produced are of higher resolution. / More details can be shown.                  1

3      (a)    Cell X is a green leaf cell. Cell Y is a human cheek cell.                                          1
                Reason: Cell X has a regular shape. / Cell X has a cell wall.                                          1
        (b)    A: It controls the movement of substances in and out of the cell.                                 1
B: It holds many organelles. / It is the site for many chemical reactions. / It allows the movement and transport of materials inside the cell.                                                      1
(c)    Both cells X and Y are eukaryotic cells                                                                         1

        because they have a true nucleus.                                                                                   1

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