Home
Class 12
BIOLOGY
DNA cannot pass through a cell membrane ...

DNA cannot pass through a cell membrane as
1) it is too big to cross the memebrane
2) it is a hydrophilic molecule
3) membrane does not have specific proteins to facilitate the transport
4) none of these

A

1) it is too big to cross the memebrane

B

2) it is a hydrophilic molecule

C

3) membrane does not have specific proteins to facilitate the transport

D

4) none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • BIOTECHNOLOGY - PRINCIPLES AND PROCESSES

    NCERT FINGERTIPS ENGLISH|Exercise HOTS|5 Videos

  • BIOTECHNOLOGY - PRINCIPLES AND PROCESSES

    NCERT FINGERTIPS ENGLISH|Exercise NCERT|19 Videos

  • BIODIVERSITY & CONSERVATION

    NCERT FINGERTIPS ENGLISH|Exercise Biodiversity & Conservation|140 Videos

  • BIOTECHNOLOGY AND ITS APPLICATION

    NCERT FINGERTIPS ENGLISH|Exercise Biotechnology And Its Application|137 Videos

Similar Questions

Explore conceptually related problems

Assertion: DNA cannot pass through cell membranes Reason :DNA is a hydrophobic molecule

Since DNA is a hydrophilic molecules, it cannot pass through cell membranes. Why ?

Read the following statements carefully - (A) The lipid component of the plasma membrane mainly consists of phosphoglycerides. (B) Polar molecules can pass through the lipid bilayer of the plasma membrane, therefore they do not require carrier proteins to facilitate their transport. (C ) The secondary wall is capable of growth and it is formed on the outer side of the primary wall. (D) Quasifluid nature of lipid enables the lateral movement of proteins within the overall lipid bilayer of the plasma membrane. (E) Middle lamella glues the different neighbouring cells together. How many statements are incorrect?

DNA being hydrophilic cannot pass through the cell membranes of a hot cell. Explain how does recombinant DNA get introduced into the host cell to transfrom the latter.

DNA being hydrophilic cannot pass through the cell membranes of a hot cell. Explain how does recombinant DNA get introduced into the host cell to transfrom the latter.

Read the following statements and choose the correct ones-- (A) Diffusion is a slow process and is dependent on a living system. (B) Diffusion of substances with hydrophilic moiety is facilitated by membrane proteins. (C) Facilitated diffusion causes net transport of molecules from a low to a high concentration. (D) Saturations may be achieved in both facilitated diffusion as well as active transport .

Go through the following statements (i) In human beings, the membrane of the erythrocyte has approximately 52 percent lipids and 40 percent proteins (ii) Lipids are arranged within the membrane with the hydrophobic tails towards the outer side and the polar head towards the inner side. (iii) As the polar molecules cannot pass through the non- polar lipid bilayer, they require a carrier protein of the membrane to facilitate their transport across the membrane (iv) The endomembrane system includes endoplasmic reticulum, Golgi complex, lysosomes and peroxisomes Find out the wrong peroxisomes :

Significance of 'heat shock' method in bacterial transformation is to facilitate: (a) Binding of DNA to the cell wall (b) Uptake of DNA through membrane transport proteins (c) Uptake of DNA through transient pores in the bacterial cell wall (d) Expression of antibiotic resistance gene

Select the wrong statement (a) Presence of chromogenic substrate gives blue color colonies if the plasmid in the bacteria does not have an insert (b) Retroviruses in animals have the ability to transform normal cells into cancerous cells (c) In microinjection, cells are bombarded with high velocity microparticles of gold or tungsten coated with DNA (d) Since DNA is a hydrophilic molecule it cannot pass through cell membranes

Consider the following statements each with one or two balnks. (i) The bile duct and the pancreatic duct open together into the duodenum as the (1) which is guarded by a sphincter called the (2) (ii) (3) is a proteolytic enzyme found in gastric juice of infants which hleps in the digestion of milk proteins. (iii) Fatty acids and glycerol being insoluble, cannot be absorbed into the blood. They are first incorporated into small droplets called (4) which move into the intestinal mucose. They are re-formed into very small protein coated fat globules called the (5) which are transported into the lymph vessels (lacteals ) in the villi. Which of the folllowing options gives the correct fill ups for the respective blanks in the above statements?

NCERT FINGERTIPS ENGLISH-BIOTECHNOLOGY - PRINCIPLES AND PROCESSES-Biotechnology - Principles And Processes
  1. Read the given statements and select the correct option. Statement 1...

    Text Solution

    |

  2. a crown gall bacterium, is called an natural genetic engineer' of plan...

    Text Solution

    |

  3. DNA cannot pass through a cell membrane as 1) it is too big to cross...

    Text Solution

    |

  4. The term "competent" refers to

    Text Solution

    |

  5. The correct sequence of making a cell competent is

    Text Solution

    |

  6. Match the terms given in column I with their definitions in column II ...

    Text Solution

    |

  7. Micro-injection is a method used to

    Text Solution

    |

  8. Which of the following is required for micro-injection method of gene ...

    Text Solution

    |

  9. In biolistic method of gene trasfer, the microparticles coated with fo...

    Text Solution

    |

  10. The different steps of recombinant DNA technology are given below rand...

    Text Solution

    |

  11. The given flow chart depicts the steps to transfer a desirable gene of...

    Text Solution

    |

  12. Fill up the blanks and select the correct option. (i) EcoRl cuts the...

    Text Solution

    |

  13. In the isolation of DNA, removal of protein and RNA is carried out by ...

    Text Solution

    |

  14. During isolation of genetic material, the chemical used to precipitate...

    Text Solution

    |

  15. Precipitates of purified DNA after the addition of chilled ethanol are...

    Text Solution

    |

  16. Match column I with column II and select the correct answer from the g...

    Text Solution

    |

  17. The polymerase chain reaction is a technique used for 1) amplificati...

    Text Solution

    |

  18. Process used for amplification or multiplication of DNA in DNA fingerp...

    Text Solution

    |

  19. Primers are 1) chemically synthesised oligonucleotides that are comp...

    Text Solution

    |

  20. Enzyme 'Taq polymerase' used in PCR, has been isolated from bacterium ...

    Text Solution

    |