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- 1. Multiple Choice
What is a stem cell?
a meristem
a zygote
a differentiated cell
an unspecialised cell
- 2. Multiple Choice
Which is not a source of embryonic stem cells?
umbilical cord blood
bone marrow
aborted embryos
amniotic fluid
- 3. Multiple Choice
What occurs during stage 2 of the cell cycle?
the number of sub-cellular structures increases
the nucleus divides
the DNA replicates
the cell divides
- 4. Multiple Choice
What is meant when you say that a cell has differentiated?
cells have become enlarged
cells have specialised to complete a particular function
cells are unspecialised and can change to have any function
cells have undergone cell division by mitosis
- 5. Multiple Choice
A cell has four chromosomes.
During the cell cycle, how many chromosomes will the cell
have at the end of stage 1?
one
four
two
eight
- 6. Multiple Choice
The drawing shows a plant root. What is the zone labelled X?
zone of elongation
zone of specialisation
zone of cell division
zone of differentiation
- 7. Multiple Choice
For which medical condition would stem cell treatment be ineffective?
macular degeneration (eyesight deterioration)
preventing HIV
insulin production
spinal cord injuries
- 8. Multiple Choice
What is the biggest disadvantage of using adult stem cells?
it involves therapeutic cloning, which is very difficult
they grow and divide very rapidly with the risk of causing cancer
it may trigger an immune response
some people may disagree for ethical reasons
- 9. Multiple Choice
At which stage of life does mitosis occur at a slower rate than cell death?
developing embryo
childhood
old age
adulthood
- 10. Multiple Choice
Where would you find the greatest concentration of
undifferentiated cells in a plant?
in the phloem
in the palisade layer in the leaf
in the root tips
in the xylem
- 11. Multiple Choice
In which part of the body would the rate of mitosis
be happening the fastest?
the brain
the skin
the spinal cord
the eye
- 12. Multiple Choice
The table shows some characteristics of differentiation of cells in animals and in plants.
Which row shows characteristics of differentiation of cells in both animals and plants?
A
B
C
D
- 13. Multiple Choice
What would be an advantage of using genetically identical
clones of plants created from stem cells in research?
the experiment would not need repeating
it removes unwanted variables
it removes human error from the experiment
the results would be exactly the same each time
- 14. Multiple Choice
Which is a disadvantage of therapeutic cloning?
there are concerns about the risk of cancer from rapid cell division
there is the risk of transfer of genetic diseases
the use of immunosuppressant drugs is required
cells would have different genes to the recipient
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