Pine View School
Honors Biology
Name:___________________________ Date:_________________
Chapter 10 – DNA
Worksheet – Structure of DNA and Replication
SC.912.L.16.3: Describe the basic process of DNA replication and how it relates to the transmission and
conservation of the genetic information.
Directions: Label the diagram below with the following choices:


Nucleotide
Base pair


Deoxyribose
Hydrogen bond


Phosphate group
Nitrogenous base
1. ____________________
6. ____________________
2. ____________________
5. __________________
4. ____________________
3. ____________________
Label the 3’ and 5’ ends of both DNA polymers
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Directions: Complete each sentence.
7. Guanine, cytosine, thymine, and __________________ are the four __________________
in DNA.
8. In DNA, guanine always forms hydrogen bonds with __________________.
9. The process of __________________ produces a new copy of an organism’s genetic
information, which is passed on to a new cell.
10. The double coiled, “staircase” shape of DNA is called a __________________.
Directions: Answer each question in complete sentences.
11. What do the letters DNA stand for?
_________________________________________________________________________
12. Where is DNA found? ____________________________________________________
13. Label the nucleotides (A, T, G, C) in the DNA molecule below, identify the 3’ and 5’
ends:
14. What is the first step in the process of DNA replication?
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15. What is the first step in the process of DNA replication?
_________________________________________________________________________
_________________________________________________________________________
16. Which enzyme is responsible for “unzipping” the DNA double helix?
_________________________________________________________________________
17. Which enzyme is responsible for facilitating the hydrogen bonding between nucleotides in
a new DNA molecule?
_________________________________________________________________________
_________________________________________________________________________
18. Which enzyme is responsible for creating the covalent bonds that connect the sugarphosphate backbone of the new DNA molecules?
_________________________________________________________________________
19. If the sequence of one single strand of DNA is C-A-A-G-T-A-G-G-C-T, what is the
sequence of the complementary strand?
_________________________________________________________________________
20. Describe the origin of each strand of the new double helices created after DNA
replication.
_________________________________________________________________________
_________________________________________________________________________
21. Why is DNA replication important to the growth and development of a multi-cellular
organism?
_________________________________________________________________________
_________________________________________________________________________
22. Place the following terms in the correct order from smallest to largest: Nucleosome,
supercoils, coils, chromosome, DNA double helix
_________________________________________________________________________
_________________________________________________________________________
23. List the 3 basic steps of DNA replication:
a. _________________________________________________________________
b. _________________________________________________________________
Original
c. _________________________________________________________________
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A
T
C
C
G
T
G
24. The model of DNA below is ready to be copied. Compared to the
original double helix, evaluate the copies made during three attempts
of DNA replication. List any errors with the replication if they occurred:
A
T
C
C
G
T
G
Replication #1
T
A
G
G
AND
C
A
C
Replication #2
A
T
T
A
C
G
C
G
G
C
T
A
G
C
AND
A
T
C
A
G
T
G
T
A
G
G
C
A
C
A
T
C
C
G
T
G
T
A
G
G
C
A
C
List problems if any:
_______________________
_______________________
_______________________
_______________________
_______________________
_______________________
T
A
G
G
C
A
C
List problems if any:
_______________________
_______________________
_______________________
_______________________
_______________________
_______________________
25. Complete the diagram on the left. Then circle the areas in the diagram on the right that
show a genetic mutation.
DNA Correctly Copied
DNA Incorrectly Copied
A
G
C
T
A
T
A
A
G
C
T
A
T
A
4
A
G
C
T
A
T
A
T
C
G
A
T
G
T
G
G
C
T
A
C
A
T
C
G
A
T
A
T
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26. Explain how the mutations might have been caused in the diagram above.
_________________________________________________________________________
_________________________________________________________________________
_________________________________________________________________________
DNA - Episode 1 of 5: The Secret of Life - PBS Documentary
https://www.youtube.com/watch?v=d7ET4bbkTm0
Published on Mar 21, 2013
In 1973 two scientists undertook an experiment which rocked the world. By transferring DNA from one species to another,
Herb Boyer and Stan Cohen became the first Genetic Engineers. Their experimrnt triggerd a wave of controversy about
the dangers of genetic manupulation, but it also generated a multi billion dollar industry.
Biotechnology would soon transform the pharmaceutical industry and genetically modified food was to herald the biggest
revolution in agriculture since the industrialization of farming. Yet the public was skeptical, and so were certain scientists.
Some feared that a cancer-causing gene stitched into the DNA of a bacterium might be accidentally absorbed in the
human gut, enabling cancer to be passed on like an infectious disease. Biologists from all over the world were called to a
meeting in California to draw up a strict set of safety guidelines.
When the panic subsided the stage was set for a biotechnology bonanza. A race began to produce genetically engineered
insulin. A couple of years later a young researcher called Rob Horsch, who worked for the chemical giant Monsanto,
produced the first genetically engineered plant. The biotech revolutions had arrived.

o

o
Category
Education
License
Standard YouTube License
DNA - Episode 2 of 5 - Playing. God - PBS Documentary
https://www.youtube.com/watch?v=M3wg-W3Slow
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