\ 9,
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Label the parts of the sbucture in the diagram below.
14. Name the nitrogenbases thatpair
up to make up the rungs of the DNAladder.
pai,rs with
wl
WI
pairs with
15. Completethe flowchart to show what happers during DNA replication.
DNA Repllcatlon
The trro sldes of the DNA molecule
Nlkogen basesfloatinEIn the nucleuspalr up wlth the
on each halt of the DNA molecule.
When the new bases are attached. two new
Stage3r Cytokinesis
10. Duringcytokinesis the
the organellesinto eachof the two new cells.
dMdes; diskibuting
. 11. Is the following sentencetrue or false?During cytokinesisin plant cells,
the new cell membranelorms before the new cell wall does.
I
Structureand Replicatlonof DNA
1Z Why does a cell make a copy of its DNA before mitosis occurs?
Circle the letter of each molecule that makes up the sides of the DNA
ladder.
a. deoxyribose
b. glucose
c. phosphate
d.orygm
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Date
Class
Cell Processesand Energy ' Guided Readingand Study
CeltDEvision
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S€age'l:lmterphase
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1. The regular sequenceof growth and division that cellsr.urdergois cailed
the
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2- List three things that the cell is doing during interphase.
t:.
\f,
a
a.
g
b.
ir4t
a
c.
3. Cirde the letter of the specificprocessduring whidr the cell qopies
iis DNA.
a. interphase
b. cytokinesis
c. replication
d. division
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Stage9: Mitosis
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4. Cirde the letter of eachsentencethat is true about mitosis.
a. The cell makesa copy of its DNA.
b.The cell membranepinchesin around the middie of the cell.
c. The celllsnucleusdivides into two new nuclei.
d. One copy of DNA is d:istributedinto eachdaughtercell.
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Match the phasesof mitosiswith the evmtsthat occurin each.
Event
5. The centromeressplit and the
chromatidsseParate.
6. The chromatincondensesto
form chromosomes.
7. Anewnuclearenvelope
forrrs around eachregion of
chromosomes.
Phase
a. prophase
b. metaphase
c. anaphase
d' telophase
line up across
8. The chromosomes
the centerof the cell.
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