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Transcript
1.2 The Cell Cycle and Mitosis
© Pearson Education
www.sciencesource.ca
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Across
1. Some _____, called bacteriostatic drugs,
temporarily stop bacteria from growing
by interfering with mitosis.
4. During much of the _____ _____, the
cell grows and prepares for cell division.
6. A cell dies as a normal part of the
functioning of healthy multicellular
organisms. This regulated, or controlled,
cell death is known as _____.
7. During _____, sister chromatids
separate into individual chromosomes
and move to opposite poles.
9. In animal cells, a pair of organelles
called _____ moves to each end of the
cell during prophase, forming the poles
of the mitotic spindle.
Down
2. The process of splitting the cytoplasm is
known as _____ and it occurs during
telophase.
3. The Sun is necessary for all life on
Earth, but it is also the source of _____
(UV) radiation, which is harmful to skin
cells.
5. During the last phase of mitosis, known
as _____, the cell divides the cytoplasm
into two portions.
8. During _____, the chromosomes line up
at the centre of the cell.
9. Chromatids are attached to the spindle
at their _____.
12. In early prophase, _____ condenses to
form chromosomes.
Across
Down
10. This is an electron micrograph of _____
showing the different layers of cells. You
lose about 30 000 to 40 000 of these
cells every minute.
11. During the first phase of mitosis, called
_____, the chromatin (DNA and proteins)
that makes up the chromosomes
condenses.
14. A cell is in _____ when it is preparing for
cell division.
15. A cell that divides uncontrollably is called
a _____ cell.
16. During this phase, the cell makes
(synthesizes) an entire copy of the DNA
of the cell.
17. A _____ is a long piece of coiled DNA
and proteins.
18. Cancer cells can seem to be “immortal”
because they do not stop _____.
19. The _____ _____ is completed during
metaphase and is made of tiny tubes
that extend from each pole to the middle
of the cell.
13. Cell division involves packaging the
genetic information in the nucleus into
two equal portions; this process is called
_____.