a presentation of DNA and the 4 key players or the enzymes that help the DNA to replicate it self the primase, DNA helicase , DNA ribose and DNA ligase are the enzymes that help the process in DNA replication.

1. SCIENCE

3. REPLICATION PROCESS

4. OBJECTIVES
 Describe DNA replication
 Explain the process of DNA replication
 Appreciate the importance of DNA replication

5. What is replication process?
 DNA replication is the biological process of producing two
identical replicas of DNA from one original DNA molecule

7. Enzymes are
proteins that
act as
biological
catalysts.

8. DNA helicases are essential during DNA replication because they
separate double-stranded DNA into single strands allowing each
strand to be copied.

10. These enzymes are essential for DNA replication and
usually work in groups to create two identical DNA
duplexes from a single original DNA duplex

12. These primers serve as a starting point
for DNA synthesis

14. a ligase is an enzyme that can catalyze the joining of two
large molecules by forming a new chemical bond

17. Activity 1 DNA MAKES DNA
 Objective:
Make a model of DNA template to determine the
sequence of bases in the new DNA strand
 Materials:
crayons
scissors
paste/tape
¼ size illustration board or long size
folder

18. PROCEDURE
1.Use the patterns of the components of the DNA provided by your teacher. Color
code phosphate=blue, deoxyribose sugar=green, and nitrogenous bases as
follows:Adenine=yellow,thymine=pink,guanine=violet and cytosine=red
7. Tape the cut out pattern to forming nucleotides
for the second strand of DNA molecule.
2.Cut out the shapes of each nucleotide 8. Match bases of the first strand and second
strand. Do not tape across bases.
3. Build a model of a strand of a DNA molecule. The Strand should
contain 6 base “rungs”following the given order of the nucleotides
below.
Guanine thymine
adenine cytosine
Cytosine guanine
9. Once you have made your DNA model, separate the two
strand of the DNA model down the middle so that there are
now two single strands of DNA.
4. Tape the cut out pattern to form the nucleotides. 10Create new double-stranded DNA by matching
complementary nucleotides to the bases of each single
strand.
5. Let this arrangement represent the left half of
your DNA molecule.
11. Tape and then cut out pattern forming the
nucleotides for each of the single nucleotides.
6.Make a complementary strand for the first strand 12.When you are finish, ,mount the original DNA model
and the DNA with its complementary strand in the

19. 1. Compare the new strand of DNA, are they the same or not?
2. How do the nucleotide in DNA pair?
3. How do you compare A DNA molecule to a Zipper?
Discuss your work in front buy answering these Questions;

20. 1. Enumerate and Describe in order the process of DNA
replication. 10 pts.
2. Describe the role of each enzymes involve in the DNA
replication process. 20 pts.