Home
Class 12
BIOLOGY
Several genes called have been identif...

Several genes called ____ have been identified in normal cells which when activated will turn into ___, and under certain conditions, could lead to cancerous transformation of the cells.
Complete the above paragraph by selecting correct sequence of words.

A

oncogenes, proto oncogenes

B

cellular oncogenes, proto oncogenes

C

proto oncogenes, oncogenes

D

oncogenes, proto oncogenes

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • EVOLUTION

    NCERT FINGERTIPS|Exercise Evolution|160 Videos

  • HUMAN REPRODUCTION

    NCERT FINGERTIPS|Exercise Human Reproduction|185 Videos

Similar Questions

Explore conceptually related problems

Each thoracic segment of Periplaneta americana is enclosed by four "____" skeletal sclerites : a dorsal "_____" a ventral "______" and two lateral "______" . The "_____" of the prothorax is also called pronotum, which covers the neck and a part of the head Complete the above paragraph by selecting the correct sequence of words.

Assertion : Proto-oncogenes are cellular genes required for normal growth. Reason : Under normal conditions they could lead to the oncogenic transformation of the cell.

a) Cancer is one of the most dreaded diseases of humans. Explain 'Contact inhibitions' and Metastasis' with respect to the disease. b) Name the group of genes which have been identified in normal cells that could lead to cancer and how they do so? c) Name any two technique which are used to detect cancers of interorgans? d) Why are cancer pateints often given a-interferon as part of the treatment.

Study the following step which are followed during the process of gene therapy while treating a patient of SCID (i) Retrovirus infects lymphocytes extracted from bone marrow of the patient and cultured (ii) Engineered cells are injected into patient's bone marrow (iii) Normal allele is inserted into a retrovirus (iv) Retrovirus makes a DNA copy of its RNA. This DNA carrying the normal allele gets inserted into the chromosome of the host cell Arrangement the above given steps in correct sequence and select the correct option

The different steps of recombinant DNA technology are given below randomly. (i) Isolation of the DNA fragments or genes to be cloned (ii) Introducting of the recombinant DNA into a suitable cell (usually E. coil) called host (transformation) (iii) Multiplication/expression of the introduced gene in the host (iv) Selection of the transformed host cells, and identification of the clone containing the desired gene/DNA fragment (v) Insertion of the isolated gene in a suitable plasmid vector Which of the following represents the correct sequences of steps ?

Fuel cells are the commercial cells which converts the chemical energy into electrical energy and differ from the normal batteries since fuel cells require constant source of fuel and oxygen to obtain electric current. However, they can be used to produce electricity as long as the supply of fuel and oxygen is maintained. All fuel cells consist of an andoe and a cathode and an electrolyte which allows charges to move between the two sidez of the fuel cell. Electrons are drawn from anode to cathode through an external circuit and hence produce direct current electricity. Under practical cases, efficient of fuel cell is around 40-60% and in some cases it may be as high as 85-90% Some common examples of fuel cell are diect methanol fule cell (DMFC), Direct Borohydride fuel cell (DBFC), alkaline fuel cell (AFC) and others.While in DMFC the electrolyte is an ionomer (proton exchange monomer) in case of AFC and DBFC the electrolyte is an aqueous alkaline solution. Also, in case of DBFC the borohydride gets oxidised to metaborate, In all the above three cases, at cathode reduction of O_(2) (gas) occurs in a medium controlled by the electrolyte. Based on this information answer the electrolyte. Based on the information answer the question that follow : Data {:(DeltaH_(f)^(@)CH_(3)OH(l)=-230kJ//"mole",,DeltaH_(f)^(@)CO_(2) =-390kJ//"mole"),(Delta_(f)^(@)H_(2)O(l) = - 285 kJ//"mole",,S_(mH_(2)O(l))^(@)=130J//K "mole"),(S_(mCO_(2(g))) = 210 J//K "mole",S_(mH_(2)O(l))^(@) = 110 J//K "mol"),(S_(mO_(2(g)))=206J//K "mole",,S_(mH_(2(g))) = 130J//K "mole"),("All data at" 300 K.,1/F = 10^(-5)C^(-1)):} If in AFC, H_(2)(g) is used as anode then identify the options which are not correct for AFC.

NCERT FINGERTIPS-HUMAN HEALTH AND DISEASE-Human Health And Disease
  1. Following table summarises the differences between normal cells and ca...

    Text Solution

    |

  2. A chemical carcinogen present in tobacco smoke is responsible for

    Text Solution

    |

  3. Several genes called have been identified in normal cells which when...

    Text Solution

    |

  4. Major factors that cause cancer are

    Text Solution

    |

  5. Read the following statements regarding the various techniques used in...

    Text Solution

    |

  6. Read the following statements carefully. (i) Cancer causing viruses ...

    Text Solution

    |

  7. Which of the following statements is not correct ?

    Text Solution

    |

  8. Match column I with column II and select the correct option from codes...

    Text Solution

    |

  9. Which of the following approaches are used for the treatment of cancer...

    Text Solution

    |

  10. The substance given to caner patients in order to activate their immu...

    Text Solution

    |

  11. In humans, receptors for opioids are present in

    Text Solution

    |

  12. Heroin is commonly called as

    Text Solution

    |

  13. Which compound is formed by acetylation of morphine ?

    Text Solution

    |

  14. The chemical compound whose chemical structure is given below is obtai...

    Text Solution

    |

  15. Which of the following statements is not correct ?

    Text Solution

    |

  16. Which of these is a member of the group of chemicals whose chemical st...

    Text Solution

    |

  17. Marijuana is extracted from

    Text Solution

    |

  18. Charas and ganja are the drugs which affect

    Text Solution

    |

  19. Cocaine is obtained from

    Text Solution

    |

  20. Cocaine is commonly called as

    Text Solution

    |