Download Human Body Ch 1

Name _________________________
Box #: ________ Period: _____
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Cell Division
Pages 95-102
Stage 1: Interphase
1. The regular sequence of growth and division that cells undergo is known as the _____ ______.
2. During the cell cycle, a cell ________, prepares for division, and divides into two new cells,
which are called “____________ cells.”
3. List the three main stages of the cell cycle.
4. ______________ is the period before ________ division.
5. What are the three main stages a cell goes through?
6. During interphase, the cell ________, makes a copy of it’s _______, and prepares to divide
into _______ cells.
7. What is replication?
8. What does a cell need to do to prepare for cell division?
Stage 2: Mitosis
9. What is mitosis?
10. During mitosis, one copy of the _________________ is distributed into each of the two
________________________ cells.
11. Circle the letter(s) of each sentence that is true about mitosis.
a. The cell makes a copy of its DNA.
b. The cell membrane pinches in around the middle of the cell.
c. The cell’s nucleus divides into two new nuclei.
d. One copy of DNA is distributed into each daughter cell.
Match the phases of mitosis with the events that occur in each.
Event
______ 12. The centromeres split and the chromatids separate.
Phase
a. prophase
______ 13. The chromatin condenses to form chromosomes.
b. metaphase
______ 14. A new nuclear envelope forms around each region of
chromosomes.
c. anaphase
______ 15. The chromosomes line up across the center of the cell.
d. telophase
Name _________________________
Box #: ________ Period: _____
16.
Cell Division
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Label the parts of the structure in the diagram below.(pg. 97)
Stage 3: Cytokinesis
17. During cytokinesis the _________________ divides. The _________________
are _____________________ into each of the two new cells.
18. What happens during cytokinesis in animal cells?
19. What happens during cytokinesis in plant cells?
Structure and Replication of DNA
20. Why does a cell make a copy of its DNA before mitosis occurs?
21. Circle the letter(s) of each molecule that makes up the sides of the DNA ladder.
a. deoxyribose
c. phosphate
b. glucose
d. oxygen
22. Name the nitrogen bases that pair up to make up the rungs of the DNA ladder.
a. ______________________ pairs with ______________________ .
b. ______________________ pairs with ______________________ .
23. Complete the following sentences to show what happens during DNA replication.
a. The two sides of the DNA molecule __________________ and __________________.
b. Nitrogen bases floating in the nucleus pair up with the ______________________ on
each half of the DNA molecule.
c. Because of the way in which the __________________ bases pair with one another, the
______________ of the bases in each new DNA molecule ________________ matches
Name _________________________
Box #: ________ Period: _____
the order in the
_______________________DNA molecule.
Cell Division
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