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Cancer - causes, signs and diagnosis - class-XII

Description: cancer - causes, signs and diagnosis
Number of Questions: 24
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Tags: human health and diseases zoology
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Treatment of cancerous growths and tumours with radioactive substances is

  1. Radiology

  2. Radiotherapy

  3. Nuclear medicine

  4. Both B and C


Correct Option: D
Explanation:

  • Radiation therapy (also called radiotherapy) is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumours. At low doses, radiation is used in x-rays to see inside your body, as with x-rays of your teeth or broken bones.
  • Nuclear medicine is a branch of medical imaging that uses small amounts of radioactive material to diagnose and determine the severity of or treat a variety of diseases, including many types of cancers, heart disease, gastrointestinal, endocrine, neurological disorders and other abnormalities within the body.
  • Radiology is a medical speciality that uses medical imaging to diagnose and treat diseases within the human body.

So, the correct answer is 'Both B and C'.


Medicinal plant harvested from wild for anticancer compound is?

  1. Taxus baccata

  2. Datura stramonium

  3. Rauwolfia serpentina

  4. Ocimum sanctum


Correct Option: A

Which of the following is NOT used as common radioisotope in radiotherapy for cancer?

  1. Rn-220

  2. I-131

  3. Co--30

  4. I-132


Correct Option: D
Explanation:

Iodine 132 is used in thyroid tests, rest all are used is cancer radiotherapy

So, the correct answer is 'I-132'

Treatment for cancer involves

  1. Surgery

  2. Radiation

  3. Chemotherapy

  4. All of the above


Correct Option: D
Explanation:

There are different types of treatment for cancer. They are:

  • Surgery: Surgery can be used to diagnose, treat or even help prevent cancer in some cases.
  • Radiation therapy uses high-energy particles or waves to destroy or damage cancer cells.
  • Chemotherapy is the use of the medicines or drugs to treat cancer.
Thus, the correct answer is option D.

A plant known as 'Sadabahar' is known to produce an anti-cancer drug known as

  1. Taxol

  2. Vincristine

  3. Colchicine

  4. Cyclosporin-A


Correct Option: B
Explanation:

Sadabahar - Vinca plant is now well known in modern medicine.

Vincristine and Vinblastine are extracted from these plants which are used in cancer treatment.

Hence the correct option is 'Vincristine'

Treatment of cancer by X-rays or Gamma rays is 

  1. Radiotherapy

  2. Chemotherapy

  3. Surgery

  4. Immunotherapy

  5. Hormone therapy


Correct Option: A
Explanation:
  • Radiotherapy is the use of electromagnetic radiations such as X-rays, gamma rays, electron beams or protons to kill or damage cancer cells to stop/slow them from growing or multiplying.
  • Radiotherapy can take place before, during or after treatment or in conjugation with other treatments such as chemotherapy treatment.
  • Hence Treatment of cancer by X-rays or Gamma rays is Radiotherapy.
  • So, the correct answer is 'Radiotherapy'.

For the treatment of cancer, biological response modifiers such as _______ are given.

  1. $\beta$-interferons

  2. $\gamma$-interferons

  3. $\alpha$-interferons

  4. $\delta$-interferons


Correct Option: A

Which plant is used in making of medicine for treatment of cancer?

  1. Rosa rubiginosa

  2. Madagascar periwinkle

  3. Lillium candium

  4. None of the above


Correct Option: B

How is turmeric good for treatment of cancerous tumours?

  1. Presence of curcumin

  2. Presence of cumin

  3. Both A and B

  4. None of the above


Correct Option: A
Explanation:

Curcumin, a substance found in the spice turmeric, has long been used in Asian medicine to treat a variety of maladies. Now some research suggests that curcumin may help prevent or treat cancer. Curcumin is thought to have antioxidant properties, which means it may decrease swelling and inflammation.

So, the correct answer is 'Presence of curcumin'.

Which of the following will be curable in the next two decades?

  1. Cancer

  2. Poliomyelitis

  3. Tuberculosis

  4. None of the above


Correct Option: A
Explanation:

Polio and tuberculosis are already having vaccines as polio vaccine and BCG respectively.
Some cancers can be curable in the next two decades.
Therefore, the correct answer is option A.

Paclitaxel is a drug that stabilizes microtubules, preventing their breakdown.
Why would this drug be useful for cancer therapy?

  1. The cell membrane is made largely of microtubules and cannot divide when they are stabilized.

  2. Breakdown of microtubules stimulates the start of cell division.

  3. Presence of microtubules increases density-dependent inhibition of cancer cells.

  4. Movement and breakdown of the cytoskeleton are essential to completion of mitosis.


Correct Option: D
Explanation:

Paclitaxel is a drug used in the treatment of cancer. It is a cytoskeletal drug that prevents the disssembly of microtubles that are formed during cell division,that is it stabilizes the microtubules, therefore the chromosome separation does not occur during Anaphase. If this phase is prolonged then the cell either undergoes apoptosis or it reverts back to G$ _0$ phase.

So, the correct answer is 'Movement and breakdown of the cytoskeleton are essential to completion of mitosis'




Which of the following is not used to treat cancer?

  1. $^{131}$I

  2. $^{60}$Co

  3. Taxol

  4. Streptokinase


Correct Option: D
Explanation:
  • Streptokinase (SK) is a thrombolytic medication and enzyme. 
  • As a medication, it is used to break down clots in some cases of myocardial infarction (heart attack), pulmonary embolism, and arterial thromboembolism.
  • Hence Streptokinase is not used to treat cancer.
  • So, the correct answer is 'Streptokinase'.

Drugs vincristin and vinblastin used in cancer therapy are obtained 

  1. Rauwolfia serpentina

  2. Atropa serpentina

  3. Catharanthus roseus

  4. Withania sommifera


Correct Option: C
Explanation:

Catharanthus roseus, commonly known as the rosy periwinkle is a species of flowering plant belonging to family Apocynaceae. It is native and endemic to Madagascar but grown elsewhere as an ornamental and medicinal plant. It is a source of the drugs vincristine and vinblastine which are used in the treatment of cancer. 

So, the correct answer is 'Catharanthus roseus'.

Which of the following is used in the treatment of cancer

  1. Interferon gamma

  2. Interferon alpha

  3. Inrerferon beta

  4. Reo-pro


Correct Option: B
Explanation:
  • Interferon alpha is a biological therapy drug.
  •  It may be used to treat kidney cancer, melanoma, carcinoid tumours and some types of lymphoma and leukaemia. Interferon alpha is often called interferon.
  •  It is usually is used in the treatment of cancer given as an injection under the skin (subcutaneously). 
  • Hence, Interferon alpha is used in the treatment of cancer.
  • So, the correct answer is 'Interferon alpha'.

Which of the following is used for treatment of thyroid cancer?

  1. U-238

  2. Ra-224

  3. C-14

  4. I-131


Correct Option: D
Explanation:

Iodine-131 (I-131) is an important radioisotope of iodine. Iodine-131, in higher doses, is used for ablation (surgical removal) of remnant thyroid tissue following a complete thyroidectomy (removal of the thyroid gland) to treat thyroid cancer. I-131 is also used in nuclear energy, medical diagnostic and treatment procedures, and natural gas production.

So, the correct answer is 'I-131'.

'Superbug' a biotechnological feat is useful in the _____________.

  1. Treatment of Cancer

  2. Cleaning oil Spillage

  3. Espionage

  4. Biodegradation of plastics


Correct Option: A

A recently discovered anti-cancer drug is obtained from ____________.

  1. Taxus

  2. Tagetes

  3. Tamaric

  4. Thea


Correct Option: A

Treatment of cancer can be done by 

  1. Radiation therapy

  2. Surgery

  3. Immunotherapy

  4. All the above


Correct Option: D
Explanation:

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. Treatment of cancer includes - 

  • Radiation therapy - It involves the use of ionizing radiation in an attempt to either cure or improve symptoms. It works by damaging the DNA of cancerous tissue.
  • Surgery - It is the primary method of treatment for most isolated, solid cancers and may play a role in prolongation of survival. In localized cancer, surgery typically attempts to remove the entire mass of tissue.
  • Immunotherapy - It plays a role in stimulating or helping the immune system to fight cancer.
So, the correct answer is 'All the above'.

Which of the following will be curable in next two decades?

  1. Cancer

  2. Poliomyelitis

  3. Tuberculosis

  4. None of the above


Correct Option: A
Explanation:

There are already vaccines available for Polio and tuberculosis.
In next two decades, cancer will be curable.
Thus, the correct answer is option (A), 'Cancer'.

Cancer treatment is a difficult process. Which of the following is a reason for it?

  1. Cancer call can undergo uncontrolled division.

  2. Cancer cells adapt and evolve in response to treatment.

  3. Cancer cells become unresponsive to growth signals.

  4. All of these


Correct Option: A
Explanation:
Cancer cells divide uncontrollably and exhibit properties such as loss of contact inhibition and loss of anchorage dependence which can also make them break away from the original site and travel to distant places in the body where they can begin forming a new cancer. This property is called as metastasis. Hence, treatment of cancer is a difficult process. Cancer cells become unresponsive to anti-growth signals which makes them grow uncontrollably.
So, the correct answer is, 'Cancer cell can undergo uncontroled division'.

Name of the drug used in cancer treatment produced using biotechnology.

  1. Terramycin

  2. Streptomycin

  3. Humulin

  4. Interferon


Correct Option: D
Explanation:

Interferon is the name given to a group of proteins known primarily for their role in inhibiting viral infections and in stimulating the entire immune system to fight disease. Interferons can inhibit cell division, which is one reason why they hold promise for stopping cancer growth. Interferons are members of a larger class of proteins called cytokines (proteins that carry signals between cells). Most interferons are classified as $\alpha$, $\beta$, or $\gamma$ interferons, depending on their molecular structure. Biotechnological advances making genetic engineering easier and faster are making protein drugs like interferons more available for study and use. Using recombinant DNA technology, or gene splicing, genes that code for interferons are identified, cloned and used for experimental studies and in making therapeutic quantities of protein. These modern DNA manipulation techniques have made possible the use of cell-signalling molecules like interferons as medicines.

Thus, the correct answer is option D.

A young person is suffering from cancer in tounge.His tounge is completely removed ,then which of the following situation will describe the person that he will be able to-

  1. Taste sweet & salty.

  2. Not able to taste sweet,but able to taste salty.

  3. Perceive the odour of rose but not able to taste sweet and salt.

  4. Taste sweet and salty , but not perceive to the odour of rose.


Correct Option: C
Explanation:

There are around 10,000 taste buds present in the tongue. The taste cells or gustatory cells are present in the taste buds. These are majorly present on the tip of your tongue. The taste buds for sweet are present on the tip of the tongue whereas the taste buds for salt are present on the sides of the tongue.

Hence, if the tongue is completely removed, these taste buds are also destroyed. This will result in loss of sweet and salty tastes along with other tastes.
Thus, the correct answer is option C.

The theory behind the use of lymphokines in cancer therapy is that

  1. cancer cells bear antigens that should be recognizable by cytotoxic T-cells

  2. lymphokines stimulate the immune system

  3. if cancer develops, the immune system has become ineffective

  4. all of the above


Correct Option: D
Explanation:

In the last fifteen years the role of cytokines in the modulation of anti-tumor responses has been extensively studied at the Institute of Microbiology of the University of Turin. In retrospect many observations appear to have been quite innovative and original. Altogether they form the steps of a consequential intellectual endeavour leading progressively towards a precise definition of the role of the lymphokines in modulating the immune response to neoplasia. Starting from the characterization of the tumor signals required for lymphokine induction, this research progressed towards the definition of the cellular, molecular and genetic mechanisms involved, and provisionally ends with the direct manipulation of lymphokine genes transfected to tumor cells.


So, the correct option is 'Option D'.

Electron beam therapy is a kind of radiation therapy intended to treat

  1. Enlarged prostrate gland.

  2. Gall bladder stones by breaking them.

  3. Certain types of cancers

  4. Kidney stones


Correct Option: C
Explanation:

Electron therapy or Electron Beam Therapy (EBT) is a kind of external beam radiotherapy, where electrons are directed to a tumor site. Electron beam therapy is performed using a medical linear accelerator. The same device can also be used to produce high energy photon beams. When electrons are required, the x-ray target is retracted out of the beam and the electron beam is collimated with a piece of apparatus known as an applicator or an additional collimating insert, constructed from a low melting point alloy. Electron beam therapy is used in the treatment of superficial tumors like cancer of skin regions, or total skin (e.g., mycosis fungoides), diseases of the limbs (e.g., melanoma and lymphoma), nodal irradiation, and it may also be used to boost the radiation dose to the surgical bed after mastectomy or lumpectomy. 

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