This is a discussion about the 90% activity of cell- THE INTERPHASE which comprises of three sub-stages that are needed by the cell to enter CELL DIVISION-MITOSIS or MEIOSIS

1. 1. WHAT ARE
CHROMOSOMES?
the rod-shape or threadlike
DNA- containing
structures of cellular
organism that are located
in the nucleus of
eukaryotes, and contain
all or most of the genes of
the organism.
2. WHAT DO
CHROMOSOMES
CARRY?
it carries the genetic
material (DNA) that
contains different
characteristics that
are passed from the
parents to offspring .
3. IN WHAT
STRUCTURE OF
CELL
CHROMOSOMES
ARE LOCATED?
chromosomes
are located
inside the
nucleus of
every cell.
4. HOW MANY
CHROMOSOMES
DO HUMAN
HAVE?
all humans have
twenty three
(23) pairs of
chromosomes
and equal to
forty six (46)
chromosomes.
5. HOW
IMPORTANT IS
CHROMOSOMES
TO LIVING
THINGS?
chromosomes are
important in living
things because it
carries the genetic
material which is very
important in the
development and
reproduction of
organism.

3. 1. WHAT HAVE YOU SEEN IN THE VIDEO
CLIP?
2. WHAT HAPPENED WHEN THE SPERM
AND EGG CELL UNITE?
3. WHAT DO YOU NOTICED TO THE
NUMBER OF CELLS IN THE
FERTILIZED EGG?
4. WHAT PROCESS IS INVOLVED WITH
THE CONTINUOUS INCREASE IN THE
NUMBER OF CELL?

5. LEARNING COMPETENCY
• Compare mitosis and
meiosis and their role
in cell division cycle.

6. AT THE END OF THE LESSON, STUDENTS
ARE EXPECTED TO:
 Define interphase intelligently
 Identify the three sub-stages of
interphase.
 Describe the events that happen
in each stage of the cycle.
 Appreciate the importance of cell
cycle.

7. Is a course or series of event or operations
that occur regularly and usually lead back to
the starting point.
Is the composition or combination of
parts or element so as to form a whole

8. Is the division of cytoplasm into distinct cell ;
together with mitosis, cytokinesis comprises the
phases of the cell cycle involved in cell division .
Is a continuous or connected series of event.
Is the action or process of reproducing or duplicating

9. Is a process of dividing and an instance
of distributing among a number.
Is a whole made up of complicated or
interrelated part. A group of obviously related
units of which the degree and nature of the
relationship is imperfectly known.

11.  Is the series of events
that take place in
a cell leading to its
division and duplication
of its DNA (DNA
replication) to produce
two daughter cells.
 A typical cell goes
through a process of
growth, development,
and reproduction.

12. - Is also called mitosis wherein actual cell division
happened which give rise to two daughter cell
having the same number of chromosomes as parent
cell.
- Is the phase in the life cycle of a cell wherein
the cell is not undergoing cell division but cell
organelles grow and DNA duplicate.

13. The longest stage in cell cycle
because cell spend their growth
for almost 90% of their
development in this phase.
The three stages of interphase
are G₁, S, and G₂.

20. • WHAT IF THE CELLS DO NOT UNDERGO CELL
CYCLE?
– There is no growth and development.
Reproduction was also impossible.
• WHAT WILL HAPPEN OR DEVELOP
WHEN THE CELL CYCLE GOES WRONG?
– MUTATION will occur. Here, the cells
normal growth is lost in which cancer cell
may develop and continue to multiply.

22. I learned that
__________________.
Based on these, I realized that
__________________.
From now on, I will
__________________.
SUM UP TODAY’S LESSON BY COMPLETING THE SENTENCES.

23. GENERALIZATION
 Cell cycle is a complex sequence of
events by which cells grows and
divides, it is divided into two stages;
INTERPHASE, the longest phase and
MITOTIC PHASE, the shortest phase.
 Interphase is were cells grows and
develop.

24. • The reason why it takes that long because it consists
of three individual stages namely:
G1 phase/the first gap period where the
formation of new cell until it begins to replicate
its DNA.
S phase or synthesis phase, the middle stage and
the period of DNA replication in preparation for
the next cell division.
G2 phase, is the increase in the production of
protein.

25. DIRECTIONS: Read and analyze the questions
carefully. Write only the letter of the best answer.
1. Which of the following is the best definition
of interphase?
Cells merely grow and develop
Division of cytoplasm
Reproduction of cell
Splitting of nucleus

26. 2. During interphase, most of the life of the cell is spent in
the period of growth and development. Which phases
belong to interphase?
Cytokinesis, G1 phase, S phase
Cytokinesis, G1 phase, S phase, G2 phase
G1 phase, S phase, G2 phase
G1 phase, S phase, G2 phase, prophase

27. 3. Which stage is active in the replication of DNA?
G1 phase
G2 phase
M phase
S phase

28. 4. It is the stage wherein the productions of
protein increase.
G1 phase
G2 phase
M phase
S phase

29. 5. Why is the cell cycle important?
I. Fertilized egg develops into mature egg.
II. The number of cells in the body increases.
III. Hair, skin, blood and other internal
organs are renewed.
IV. Avoid genetic mutation.
I AND II
I AND III
I AND IV
III AND IV

30. DIRECTIONS: Read and analyze the questions
carefully. Write only the letter of the best answer.
1. Which of the following is the best definition
of interphase?
Division of cytoplasm
Reproduction of cell
Splitting of nucleus
Cells are merely grow and develop

31. 2. During interphase, most of the life of the cell is spent in
the period of growth and development. Which phases
belong to interphase?
Cytokinesis, G1 phase, S phase
Cytokinesis, G1 phase, S phase, G2 phase
G1 phase, S phase, G2 phase, prophase
G1 phase, S phase, G2 phase

32. 3. Which stage is active in the replication of DNA?
G1 phase
G2 phase
M phase
S phase

33. 4. It is the stage wherein the productions of
protein increase?
G1 phase
M phase
S phase
G2 phase

34. 5. Why is the cell cycle important?
I. Fertilized egg develops into mature egg.
II. The number of cells in the body increases.
III. Hair, skin, blood and other internal
organs are renewed.
IV. Avoid genetic mutation.
I and II
I and IV
III and IV
I and III

35. A. FOLLOW- UP ASSIGNMENT
1. In a LONG bond paper illustrate a cell cycle in a creative way.
2. Label your drawing and give each role in these stages.
B. ADVANCE ASSIGNMENT
1. What are the two types of cell division?
2. Differentiate mitosis from meiosis.
3. What are the stages of mitosis and meiosis? Describe each
stage.
4. How many daughter cells are produce in mitotic cell and
meiotic cell division? Why?
Reference: Science Learner’s Module pg. 321-328
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