Home
Class 12
BIOLOGY
Select the two correct statements out of...

Select the two correct statements out of the four given below about lac operon.
(i) Glucose or galactose may bind with the repressor and inactivate it.
(ii) In the absence of lactose the repressor binds with the operator region
(iii) The z-gene codes for permease
(iv) This was elucidated by Francois jacob and Jacque monod are:

A

a and b

B

b and c

C

Only b

D

Only d

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEST 1

    AAKASH INSTITUTE ENGLISH|Exercise Examplle|19 Videos

  • TEST 3

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|94 Videos

Similar Questions

Explore conceptually related problems

Select the two correct statements out of the four (1-4) given below about lac operon. 1. Glucose or galactose may bind with the repressor and inactivate it 2. In the absence of lactose the repressor binds with the operator region 3. The z-gene codes for permease 4. This was elucidated Francois Jacob and Jacque Monod The correct statements are :

Study the figure given below and answer the questions: (i) How does the repressor molecule get inactivated? (ii) When does the transcription of lac mRNA stop? (iii) Name the enzyme transcribed by the gene Z'.

Consider the following four statements (i-iv) regarding kidney transplant and select the two correct ones out of these (i) Even if a kidney transplant is proper the recipient may need to take immuno-suppressants for a long time (ii) The cell-mediated immune response is responsible for the graft rejection (iii) The B-lumphocytes are responsible for rejection of the graft (iv) The acceptance or rejection of a kidney transplant depends on specific interferons The correct statements are

Consider the following four statements (i-iv) regarding kidney transplant and select the two correct ones out of these (i) Even if a kidney transplant is proper the recipient may need to take immuno-suppressants for a long time (ii) The cell-mediated immune response is responsible for the graft rejection (iii) The B-lumphocytes are responsible for rejection of the graft (iv) The acceptance or rejection of a kidney transplant depends on specific interferons The correct statements are

Consider the following four statements (I-IV) regarding kidney transplant and select the two correct ones out of these. I. Even if a kidney transplant is proper the recipient may need to take immuno-suppresants for a long time. II. The cell-mediated immune response is responsible for the graft rejection. III. The B-lymphocytes are responsible for rejection of the graft. IV. The acceptance or rejection of a kidney transplant depends on specific interferons. The two correct statements are

Read the following statements about menstrual cycle and select two correct statements: (i). Lack of menstruation may be indicative of pregnance (ii). The changews in the ovary and the uterus are induced by changes in the lveles of ovarian hormones only (iii). LH suge induces ovulation (iv). If fertilisation occurs, corpus luteum degenerates immediately

Read the following statements about menstrual cycle and select two correct statements. (i) Lack of menstruation may be indicative of pregnancy. (ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only. (iii) LH surge induces ovulation. (iv) If fertilization occurs, corpus luteum degenerates immediately

Read the following statements for lac operon: i. Each operon has its specific operator and specific repressor. ii. The y gene codes permease, which increases the permeability of the cell to beta-galactosides. iii. Regulation of lac operon can be visualized as regulation of enzyme synthesis by its substrate. Select the option with the correct statements.

Study the four statement (i-iv) given below and select the two correct ones out of them (i) A lion eating a deer and a sparrow feeding or grains are ecologically similar in being consumers. (ii) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (iii) Predators ultimately lead to the extinction of prey species (iv) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are

AAKASH INSTITUTE ENGLISH-TEST 2-EXERCISE
  1. If a cell lacks RNA polymerase III, then it cannot synthesize

    Text Solution

    |

  2. The directions of RNA and DNA synthesis are respectively

    Text Solution

    |

  3. Select the two correct statements out of the four given below about la...

    Text Solution

    |

  4. If the sequence of the nitrogenous bases on template strand is ATCTGGC...

    Text Solution

    |

  5. Select the correct option to fill up the blanks in the following state...

    Text Solution

    |

  6. Select an option that shows the correct sequence of the events involve...

    Text Solution

    |

  7. Griffith discovered the process of

    Text Solution

    |

  8. Identify the type of gene, on the basis of given characters from a to ...

    Text Solution

    |

  9. Peptidyl transferase plays an important role during protein synthesis....

    Text Solution

    |

  10. In E. coli, Cairns proved

    Text Solution

    |

  11. Match the following columns and select the correct option Column ...

    Text Solution

    |

  12. Prokaryotic and Eukaryotic Cell

    Text Solution

    |

  13. Reverse flow of information from RNA to DNA occurs in

    Text Solution

    |

  14. The structures which appear as "beads on string" in chromatin under el...

    Text Solution

    |

  15. Four DNA samples were extracted from different organisms whose sequenc...

    Text Solution

    |

  16. Read the following statements and choose the correct one(s). A. During...

    Text Solution

    |

  17. N-glycosidic linkages in a polynucleotide chain join

    Text Solution

    |

  18. All the termination codons of universal genetic codes begin with a nuc...

    Text Solution

    |

  19. In the synthesis of which of the following, DNA is not directly involv...

    Text Solution

    |

  20. Choose the incorrect statement.

    Text Solution

    |