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WorksheetsB2 Cells
Total questions: 25
Worksheet time: 19mins
If a gill of an axolotl is removed, stem cells in the damaged area will divide and a new gill will grow. When stem cells specialise to produce gill cells, this process is known as
adaptation
differentiation
evolution
variation
to grow a new gill the stem cells divide by..
binary fission
mitosis
evolution
mutation
Which one of the following does not contain stem cells?
Meristem
Bone marrow
Hair
Embryos
Axolotls are small animals. Axolotls are used in stem cell research.What is advantage of using axolotls in stem cell research?
Axolotls are cheap to feed.
Axolotls are endangered.
Axolotls live in water
Axolotls have gills
shows the production of sperm cells in humans. Cell A is a normal body cell. How many chromosomes are there in cell A?
13
23
46
64
What is the mass of DNA in cell E?
A quarter of the mass of the DNA in cell A
Half the mass of the DNA in cell A
The same mass as the DNA in cell A
Twice the mass of the DNA in cell A
Sometimes there are errors in copying the genetic material.
What term describes an error in the genetic material?
Absorption
Fertilisation
Adaptation
Mutation
An embryo develops from the single cell. The cell divides three times to produce the embryo. How many cells are there in the embryo after three cell divisions?
3
6
8
9
An embryo develops from the single cell. What is the name of this type of cell division?
Mitosis
Meiosis
Fertilisation
Cell growth
What is NOT part of the cell cycle?
Chromosomes duplicate
Cell increases number of mitochondria
The cell divides in two
The cell fuses with another cell
What is the correct order of organisation of genetic material
DNA -> Nucleus -> Chromosome
Chromosome -> Nucleus -> DNA
DNA -> Chromosome -> Nucleus
What is NOT a function of mitosis?
Growth
Repair
Production of gametes
Binary fission (bacteria reproduction)
Chromosomes are copied during the cell cycle. Where are chromosomes found?
Cytoplasm
Nucleus
Vacuole
Ribosomes
What is the name of a section of a chromosome that controls a characteristic?
Chromatid
Gene
Ribosome
Nucleus
Which stage of the cell cycle in Figure 1 takes the most time?
Mitosis
Cell growth
Copying of chromosomes
During mitosis cells need extra energy. Which cell structures provide most of this energy?
Ribosomes
Chloroplasts
Mitochondria
Nucleus
The cell cycle in Figure 1 takes two hours in total. The cell growth stage takes 45 minutes.Calculate the time taken for mitosis.
15 minutes
25 minutes
35 minutes
Why is mitosis important in living organisms?
To produce gametes
To produce variation
To release energy
To repair tissues
As a plant grows, new root hair cells are formed from unspecialised cells. How does an unspecialised cell become a new root hair cell?
Differentiation
Metabolism
Transpiration
Transport
Which photograph in Figure 1 shows a cell that is not going through mitosis?
A
B
C
why it is ethically more acceptable to take stem cells from an umbilical cord instead of using stem cells from a 4-day-old embryo produced by In Vitro Fertilisation (IVF).
There are very few embryos available
You can obtain umbilical cords easily
4-day embryo is a (potential) human life
What is not a source of stem cells?
Bone marrow
Umbilical cord
Embryos
Liver
Why might embryos be used for stem cells rather than adult bone marrow?
there are fewer ethical issues
Embryonic stem cells can differentiate into a wider range of cells
Embryos are easier to collect
A stem cell is...
larger than an average body cell
Differentiated
Unspecialised
without a nucleus
DNA needs to be copied before cell division. True of false
TRUE
FALSE
