Home
Class 12
BIOLOGY
Read the following statements carefully....

Read the following statements carefully.
(i) Cancer causing viruses have genes called viral oncogenes.
(ii) Malignant tumors remain confined to their original location.
(iii) Cancer cells do not exhibit contact inhibition.
(iv) X-rays and UV rays are not potent carcinogens.
(v) Cancer detection is based on biopsy.
Which of the above statements are not correct regarding cancer ?

A

(iii) and (v)

B

(ii) and (iv)

C

(i), (iii) and (v)

D

(ii), (iv) and (v)

Text Solution

Verified by Experts

The correct Answer is:
B

Benign tumours remain confined to their original location. X-rays and UV-rays are carcinogenic.
Promotional Banner

Similar Questions

Explore conceptually related problems

Read the following statements and select the correct option. Statement 1 : Malignant tumors normally remain confined to their original location, do not spread to other body parts and cause less damage. Statement 2 : Cancer arising from epithelial tissues of internal organs and glands is referred to as sarcoma e.g., breast cancer, cervical cancer etc.

Read the following statements regarding the various techniques used in cancer detection. (i) Cancer detection is based on biopsy and histopathological studies of the tissue, and blood and bone marrow tests for increased cell counts in case of leukaemia. (ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by a pathologist. (iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI(magnetic resonance imaging) are very useful to detect cancers of the internal organs. (iv) Computed tomography uses strong magnetic fileds and non-ionising radiations to detect physiological changes in living tissues. (v) MRI uses X-rays and ionising radiation to generate a 3-D image of the internal structure of an object. Which of the above statements are incorrect ?

Refer the given statements (i) Incomplete or mosaic inheritance is an example of pre-Mendelian concept of blending inheritance (ii) Test cross is a special type of back cross (iii) Chromosomal aberrations are commonly observed in cancer cells (iv) Thalassaemia is a Mendelian disorder Which of the above statements are correct ?

Read the given statements carefully. (i) Innate immunity is a specific type of defence, that is present at the time of birth. (ii) Malignant malaria is caused by Plasmodium falciparum. (iii) Malaria could be confirmed by Widal test. (iv) Active immunity is slow and takes time to give its full effective response. (v) Saliva in the mouth acts as physiological barrier for pathogens. Which of the above statements are correct ?

Read the following statements and select the option which identifies the incorrect ones. (i) Potato spindle tuber disease and Chrysanthermum stunt disease are caused by viroids. (ii) T_(4) bacteriophage exhibits lytic cycle. (iii) Retroviruses have two copies of ssRNA. (iv) Interferous which prevent viral multiplication are glycolipid particles.

Read the following four statements (i) to (iv) with certain mistakes in two of them. (i) Fructose is generally absorbed by simple diffusion. (ii) The digestive wastes, solidfied into coherent faeces in the rectum initiate an endocrine action causing an urge or desire for its removal. (iii) The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall and is called the chyme. (iv) The secretions of the brush border cells of the mucosa along with the secretions of the goblet cells constitute the succus entericus. Which of the above two statements have mistake?

Read the following statements (i) Birth control pills are likely to cause cardiovascular problems (ii) A women who substitutes or takes the place of the real mother to nurse the embryo is called surrogate mother (iii) Numerous children have been produced by in vitro fertilisation but with some abnormalities (iv) Women plays a key role in the continuity of the family and human species (v) Foetal sex determinatio test should not be banned Which of the following pair consists of incorrect statements

Consider the following statements (A-D) each with one or two blanks. (A) Four characters of chordates are the presence of overset("(i)")"_____" dorsal hollow nervous system, overset("(ii)")"_____" and muscular tail (B) Agnatha are the most primitive craniates. They are commonly called overset("(iii)")"_____" vertebrates (C) Electric ray belongs to class overset("(iv)")"_____" while sea horse belongs to class overset("(v)")"_____" (D) overset("(vi)")"_____" are also defined as feathered bipeds. These have a overset("(vii)")"_____" gland on the tail Which one of the following options, correctly fills any two of the given statements ?

Match column I with column II and select the correct option from codes given below. {:("Column I", "Column II"),("Allergy", (i) "Activation of B-cells"),("Helper T-cells" , (ii)"Immunotherapy"),("AIDS virus", (iii)"Carcinogens"),("X-rays",(iv)"IgE"),("Treatment of cancer", (v) "Single stranded RNA"):}