Crossroad Maesot International Learning Centre
First-term End Assessment
Name
Year
Subject
Marks
/ 50
( Please make sure the answer papers tidy as possible )
1.Are these statements true or false? (5 marks)
1. Stem cell is an undifferentiated cell which can
differentiate to form a specialized cell and can continue
do differentiate into other cells throughout its entire
existence.
2. Undifferentiated plant cells are called meristem cells.
3. Plasmid carries extra genetic information that helps
them adapt if the environment changes.
4. Carbohydrase breaks down carbohydrates into smaller
sugar molecules.
5. Eukaryotic cells are plant cells and animal cells.
2. Tick the best correct answer from the followings. (5 mark)
a) Which of the following is correct when defining a catalyst?
(A) It decreases the rate of reaction.
(B) It increases the rate of reaction.
(C) It is unchanged by the reaction.
b) Lipases are enzymes that help to convert the lipids into fatty acids and
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glycerol. Where in the body are lipases made?
(A) the pancreas and liver
(B) the pancreas and small intestine
(C) the small intestine
c) The site of aerobic respiration is where?
(A) Cytoplasm
(B) Cell membrane
(C) Mitochondria
d) Responsible for transporting the water up the stem of a plant and into the
leaves is which one?
(A) phloem cells
(B) root hair cells
(C) xylem cells
e) Which type of disease are scientists already providing a treatment for with the
use of stem cells?
(A) Sepsis
(B) Leukaemia
(C) Alzheimer’s disease
3. Answer the following questions according to your understandings.
a) Describe how meristem tissue can be used to clone a plant. (2 marks)
b) Describe one reason why it might be useful to clone a plant. (2 marks)
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c) Complete the table below. (6 marks)
Sub-cellular
structure
Vacuole
Where is it found?
Animal Plant Bacteria
Its function
Cell
membrane
Plasmid
Ribosome
e) Present the main functions of phloem cells, root hair cells and xylem cells.
(3 marks)
f) A flea has a length of 0.05 mm. A dog has a length of 50 cm. Find the
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difference in order of magnitude. (2 marks)
g) Place one tick in each row to show whether the statement describes adult
stem cells or embryonic cells. (4 marks)
Statement
Adult
stem cells
Embryonic
stem cells
Found in human embryos.
Found in bone marrow.
Can differentiate into any cell type.
Differentiation is restricted to a few
cell types.
h) Figure shows a typical animal cell and typical plant cell. Three parts of the cells
have been labelled X, Y, and Z. (9 marks)
 Give the name of the sub-cellular structure labelled X. (1 mark)
 Give the name of the sub-cellular structure labelled Y. (1 mark)
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 Give the name of the sub-cellular structure labelled Z. (1 mark)
 Give the functions of labelled X and Z. (2 marks)
 Explain the ways in which the plant cells and animal cells are different.
(4 marks)
i) Describe what enzyme is and how the enzymes can be denatured. (3 marks)
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j) Evaluate the key differences between adult and embryonic stem cells.
(4 marks)
k) Explain how the enzymes work using four diagrams and four sentences.
(5 marks)
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