Class 12 Cbse Biology Investigatory Project on Cancer Biology

1. BANGALORE INTERNATIONAL
ACADEMY N.S.V.K.®
 NAME: Spoorthi Kulkarni
 CLASS: XII
 SUBECT: Biology Investigatory
Project
 TOPIC: Cancer Biology / Oncology.

2. Certificate
This is to certify that I, ____________
of class XII of Nehru Smaraka Vidyalaya
has successfully completely the
__________ Investigatory Project as
prescribed by the All India Senior Secondary
Certificate Examination (AISSCE) for the
academic year 2017-18.
Date:
_____________
Principal’s Signature
__________ __________
Signature of Signature of
External Examiner Internal Examiner

3. INDEX
Introduction 4
Description of Human Cancer Cells 5
Difference between healthy and cancer
cells
6-7
Cancer cell division 8-9
Causes of Cancer 10
Cancer types- Symptoms, Prevention 11-13
Cancer Treatment 14
Acknowledgement 15
Bibliography 16

4. Introduction
Cancer is a group of diseases involving abnormal cell
growth with the potential to invade or spread to other
parts of the body.
Not all tumors are cancerous; benign tumors do not
spread to other parts of the body. Possible signs and
symptoms include a lump, abnormal bleeding, prolonged
cough, unexplained weight loss and a change in bowel
movements. While these symptoms may indicate
cancer, they may have other causes.
Over 100 types of cancers affect humans.
These diseases are characterized by a cellular
malfunction. Healthy cells are programmed to ‘know
what to do and when to do it’. Cancerous cells do not
have this programming and therefore replicate and
grow out of control.
Cancerous cells in together are called Neoplasm.

5. Neoplasm
HUMAN CANCER CELLS
Cancer cells are cells that divide relentlessly, forming
solid tumors or flooding the blood with abnormal cells.
Cancer cells have distinguishing histological features
visible under the microscope. The nucleus is often large
and irregular, and the cytoplasm may also display
abnormalities.
The shape, size, protein composition, and texture of
the nucleus are often altered in malignant cells. The
nucleus may acquire grooves, folds or
indentations, chromatin may aggregate or disperse, and
the nucleolus can become enlarged.
Different combinations of abnormalities are
characteristic of different cancer types, to the extent
that nuclear appearance can be used as a marker in
cancer diagnostics and staging.

6. Cancer cell formation Cancer cell multiplication
DIFFERENCE BETWEEN Normal AND
CANCER CELLS
Normal Cells Cancer Cells
Cell Reproduction
Cell reproduction is needed to replenish
the cell population that ages or becomes
damaged or destroyed. Normal cells
reproduce properly.
These cells may have gene
mutations or chromosome mutations that
affect the reproductive properties of
the cells. They don't experience
biological aging and maintain their ability
to replicate and grow.
Cell Communication
Cells communicate with other cells
through chemical signals. These signals
help normal cells to know when to
reproduce and when to stop reproducing.
Cell signals are usually transmitted into a
cell by specific proteins.
Cancer cells lose the ability to
communicate with other cells through
chemical signals. They also lose
sensitivity to anti-growth signals from
surrounding cells. These signals normally
restrict cellular growth.
Cell Specialization
Normal cells have the ability to
differentiate or develop into specialized
cells. For example, cells can develop
into heart cells, brain cells, lung cells or
any other cell of a specific type.
Cancer cells are unspecialized and do not
develop into cells of a specific type.
Similar to stem cells, cancer cells
proliferate or replicate many times, for
long periods of time.
Cell Death

7. Normal cells have the ability to self
destruct when they become damaged or
diseased. Cells break down and are
disposed of by white blood cells.
When the genes in a normal cell are
damaged beyond repair, certain DNA
checking mechanisms signal for cell
destruction.
Morphological DIFFERENCE BETWEEN Normal AND
CANCER CELLS
Normal Cells Cancer Cells
Large cytoplasm Small cytoplasm
Single nucleus Multiple nuclei
Single nucleolus Multiple and large nucleoli

8. Fine chromatin Coarse chromatin
CANCER CELL DIVISION
Cell division is a normal process used by the body for
growth and repair. A parent cell divides to form two
daughter cells, and these daughter cells are used to
build new tissue, or to replace cells that have died as a
result of ageing or damage. Healthy cells stop dividing
when there is no longer a need for more daughter cells,
but cancer cells continue to produce copies.
Cancer is unchecked cell growth. Mutations in genes
can cause cancer by accelerating cell division rates or
inhibiting normal controls on the system, such
as cell cycle arrest or programmed cell death. As a
mass of cancerous cells grows, it can develop into a
tumor.

9. Tumor formation Cancer Development
Four basic stages of cancer

10. Differentiating between normal cell division and
cancer cell division
Causes of CANCER
 Tobacco use is the cause of about 22% of cancer
deaths.
 Another 10% is due to obesity, poor diet, lack of
physical activity, and excessive drinking of alcohol.
 Other factors include certain infections, exposure
to ionizing radiation and environmental pollutants.
 In the developing world nearly 20% of cancers are
due to infections such as hepatitis B, hepatitis
C and human papillomavirus (HPV).
 Approximately 5–10% of cancers are due to inherited
genetic defects from a person's parents.
These factors act, at least partly, by changing
the genes of a cell. Typically many genetic changes are
required before cancer develops.

11. Types of cancer and symptoms
Most Common types of Cancer:
Lung Cancer
A cancer that begins in the lungs and most often occurs in
people who smoke.
Symptoms- Cough (often with blood), Chest pain,
Wheezing and weight loss.
Prevention- Avoid smoking and carcinogens at work,
Eat diet full of fruits and vegetables,
Exercise most days of the week.
Breast Cancer
A cancer that forms in the cells of breasts.
Symptoms- Bloody nipple discharge, discomfort,
inverted nipple, lump formation near

12. breasts.
Prevention- Keep weight in check and be physically fit.
Avoid alcohol and smoking.
Avoid birth control pills and regular screening.
Avoid post-menopausal hormones.
Prostate Cancer
A cancer in a man's prostate, a small walnut-shaped gland
that produces seminal fluid.
Symptoms- Urinary problems, Blood in the urine and
semen. Pain in the hips, pelvis, spine or upper
leg. Pain or discomfort during ejaculation.
Prevention- Enough exercise. Maintaining a healthy and a
Balanced diet. Ensuring regular ejaculation.
Having green tea regularly.
Throat Cancer
Throat cancer refers to cancer of the voice box, the vocal
cords, and other parts of the throat, such as the tonsils
and oropharynx.
Symptoms: Respiratory symptoms like coughing,
Blood wheezing, or shortness of breath, weight
loss, weakness, fever, a change in voice,
Chest pain, ear pain, hoarseness swollen lymph

13. nodes in the neck, difficulty in swallowing.
Prevention: Don’t smoke, check for radon at home, regular
exercise; eat variety of fruits and vegetables,
limit the intake of alcohol, have a cup of green
tea.
Lung Cancer Breast Cancer

14. Prostate Cancer Throat Cancer
CANCER TREATMENT
Cancer can be treated in the following ways:
 Surgery
Surgery, when used to treat cancer, is a procedure in which
a surgeon removes cancer from the patient’s body.
 Radiation Therapy
It is a type of cancer treatment that uses high doses of
radiation to kill cancer cells and shrink tumors.
 Chemotherapy

15. It is a type of cancer treatment that uses drugs to kill
cancer cells.
 Immunotherapy
It is a type of cancer treatment that helps your immune
system fight cancer.
Acknowledgement
I would like to express my thanks of gratitude to our
Principal Mr.Arokia Raj sir for giving me the golden
opportunity to do this wonderful project on the topic
“Cancer Biology” which has helped me in doing a lot of
research.

16. I would extend my heartiest thanks to my Biology
teacher Mrs. Praneetha Dugar ma’am for providing me
with all the support I required at all times.
I would like to gratefully thank my parents for
providing me with all the facilities and a favourable
environment at home.
I would also thank my friends who have given me
support and helped me in finalizing the project in the
given time frame.
THANK YOU
BIBLIOGRAPHY
www.google.com
www.canceresearchuk.org
www.thoughtco.com

17. www.bing.com
www.healthtap.com
www.mayoclinic.org
www.About.com
www.dogpile.com
www.Cancer.Net
www.Cancer.gov