Home
Class 12
BIOLOGY
E. coli about to replicate was placed in...

E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observations will be correct?

A

Both the strands of DNA will be radioactive

B

One strand radioactive

C

Each strand half radioactive

D

None is radioactive.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • P.S.E.B SAMPLE PAPER-2021(SOLVED)

    JMD PUBLICATION|Exercise EXERCISE|30 Videos

  • Principle of Inheritance & Variations

    JMD PUBLICATION|Exercise EXERCISE|25 Videos

Similar Questions

Explore conceptually related problems

Two beakers of capcatity 500 mL were taken one of these beakers labelled as "A" was filled with 400 mL water whereas the beaker labelled "B" was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in close containers of same material and same capacity as shown in the figure given below: At a given temperature, whihc of the following statement is correct about the vapour pressure of pure water and that of NaCl solution.

Three beakers labelles as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO_4 and NaCl were added to the breakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions containers in beaker A, and B, where in case of beaker C, the temperature of the solution falls. Which one of the following statements(s) is(are) correct? (i) In beaker A and B, exothermic process has occured. (ii)In beaker A and B, endothermic process has occured. (iii) In beaker C exothermic process as occured. (iv) In beaker C endothermic process has occured.

M_x and M_y denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay. The Q-value for a beta^(-) decay is Q_1 and that for a beta^(+) decay is Q_2 . If m_e dentoes the mass of an electron, then which of the following statement is correct?

Five charges q_1, q_2, q_3,q_4 and q_5 are fixed at their positions as shown in Fig. S is a Gaussian surface. The Gauss's law is given by int E.dS = q/epsilon Which of the following statements is correct?

Read the given passage and answers following questions : Emulsion: It is a colloidal mixture in which both the dispersed phase and the dispersion medium are liquids. The two or more liquids present in the mixture are generally immiscible in nature. Example: Milk. Gel: It is a colloid in which the dispersed phase i.e. liquid has combined with the dispersion medium i.e. solid to produce a semisolid material. Example: jellies. Answer the following questions : Which type of nature dispersed phase and medium exist?

Read the given passage and answers following questions : Emulsion: It is a colloidal mixture in which both the dispersed phase and the dispersion medium are liquids. The two or more liquids present in the mixture are generally immiscible in nature. Example: Milk. Gel: It is a colloid in which the dispersed phase i.e. liquid has combined with the dispersion medium i.e. solid to produce a semisolid material. Example: jellies. Answer the following questions : Which type of material formed when dispersed phase and dispersion medium combined ?

JMD PUBLICATION-PRACTICE SAMPLE PAPER (SOLVED)-EXERCISE
  1. Who first suggested the conservative model of DNA replication?

    Text Solution

    |

  2. Genetic material of retrovirus is:

    Text Solution

    |

  3. E. coli about to replicate was placed in a medium containing radioacti...

    Text Solution

    |

  4. The interval between infection and appearance of disease symptoms is c...

    Text Solution

    |

  5. Which of the following is a communicable disease?

    Text Solution

    |

  6. The blood cells involved in the production of humoral immunity are

    Text Solution

    |

  7. What is true about T-lymphocytes in mammals?

    Text Solution

    |

  8. Which enzyme is added in detergent for for removing oily stains from l...

    Text Solution

    |

  9. Composited manure consists of

    Text Solution

    |

  10. Fill in the blanks Many members of the genus form mycorrhiza.

    Text Solution

    |

  11. Fill in the blanks and are free living nitrogen fixing bacteria.

    Text Solution

    |

  12. Fill in the blanks The cutting of DNA at location by RE.

    Text Solution

    |

  13. Fill in the blanks identification of DNA with desirable gene is .

    Text Solution

    |

  14. Fill in the blanks Bt toxin is coded by a gene named .

    Text Solution

    |

  15. Fill in the blanks RNAi takes place in all organisms.

    Text Solution

    |

  16. True or False: Idli is a preparation of Wheat and Bengal gram.

    Text Solution

    |

  17. true or false Fig is always pollinated by Yucca.

    Text Solution

    |

  18. True and False Type Questions India has 25 hotspots.

    Text Solution

    |

  19. True and False Type Questions Coextinction is very common is parasit...

    Text Solution

    |

  20. Are pollination and fertilisation necessary in apomixis? Give reasons.

    Text Solution

    |