3 End-of-chapter test
1
2
With reference to human chromosomes, explain what is meant by:
a homologous pairs
b sex chromosomes
c autosomes.
[2]
[2]
[1]
The table below describes events that take place during mitosis.
Copy the table and write in the names of the stages of mitosis alongside the descriptions.
[4]
Events
Stage
Chromosomes line up across the equator of the spindle,
attached to the spindle by their centromeres.
Chromosomes uncoil and elongate. Spindle breaks down
and the nuclear membrane re-forms.
Chromosomes shorten and thicken by coiling. Nuclear
membrane breaks down and spindle forms.
Chromatids separate and move to opposite poles of the
cell.
3
The diagram below shows a cell undergoing mitosis.
The magnification of the diagram is ×2200.
a
b
c
d
e
f
4
5
Identify the stage of mitosis shown in the diagram.
Name the parts labelled A to D.
Calculate the actual diameter of the cell, shown by the distance x.
Mitosis is the basis of asexual reproduction. Explain the meaning of asexual reproduction
and give one example of an organism that reproduces asexually.
During which part of the mitotic cell cycle does DNA replication take place?
In an organism that reproduces sexually, a second type of cell division called meiosis
occurs. State two ways in which cells produced by meiosis are different from cells
produced by mitosis.
[1]
[4]
[2]
[2]
[1]
[2]
Squamous epithelium is a tissue that lines the inner surfaces of blood vessels and chambers
of the heart. Explain why this tissue is a suitable lining for these organs.
[3]
a
b
c
[3]
[1]
[2]
What are stem cells?
Stem cells of a blastocyst are totipotent. What does totipotent mean?
What is the difference between stem cells in a blastocyst and those from an adult?
COAS Biology 1 Teacher Resources
Original material © Cambridge University Press 2008
1
3 End-of-chapter test
6
a
b
What is the role of a plant meristem? Give two examples of places where meristems
occur in a plant.
Describe how the following plant cells are adapted for their functions:
i xylem vessels
ii phloem sieve tubes.
Total:
38
Score:
[3]
[5]
%
Grade boundaries: 80% A, 70% B, 60% C, 50% D, 40% E
COAS Biology 1 Teacher Resources
Original material © Cambridge University Press 2008
2