Download public exam_the cell as the basic unit of life

ECF Saint Too Canaan College
Biology public exam exercise
The cell as the basic unit of life
Name: ___________________
Class: ______ (
)
Date: _____________________
CE 1990_I_Q.1(a)(i)
1.
Which of the above are plant cells? State TWO plant cell features that are common to the cells
you have listed.
(3 marks)
CE 1991_I_Q.1(a)(i)
2. Photomicrograph 1 shows some cells of a human blood smear.
Photomicrograph 2 shows some cells of an onion epidermis.
Bio_public exam exercise_the cell as the basic unit of life
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2.
(a)
With reference to the photomicrographs only, state TWO structural differences between
cell A and cell C.
(2 marks)
(b)
(i)
The central part of cell B looks lighter in colour. Explain this refer to its shape.
(2 marks)
(ii)
How is the shape related to its function?
(2 marks)
AL 2000_I_Q.1
3. Name two organelles that are found abundantly in mammalian liver cells. Relate their abundance
to the functions of the liver cells.
(4 marks)
Bio_public exam exercise_the cell as the basic unit of life
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ECF Saint Too Canaan College
Biology public exam exercise – The cell as the basic unit of life answer
1.
Cells A and D
possession of cell wall,
and large / central vacuole / peripheral nucleus
1
1
1
(3)
2.
(a)
(b)
Cell A
round shape
no cell wall
nucleus : large /
Cell C
angular shape
has cell wall
nucleus : small /
)
)
)
irregular-shaped /
lobed / centrally
placed nucleus
no vacuole
round /
peripherally
placed nucleus
large vacuole
) any Two pairs
)
)
)
(i)
(ii)
The cell is a bi-concave disc.
The central part contains less cytoplasm.
this provides a large surface area to volume ratio / shorter diffusion path to
facilitate diffusion of gases
1,1
1
1
1
1
(6)
3.
- *mitochondria (1), liver cells require a lot of energy to support its high level of metabolic
activities (1)
2
- *rough endoplasmic reticulum (1), liver cells require a lot of enzymes for catalyzing the
various metabolic activities (1)
2
(4)
Bio_public exam exercise_the cell as the basic unit of life
P.3