Home
Class 12
BIOLOGY
In a typical nucleus, some regions of ch...

In a typical nucleus, some regions of chromatin are stained light and others dark. Explain why is it so and what is its significane ?

Text Solution

Verified by Experts

In a typical nucleus, some regions of chromatin are stained light because of loose packing of chromatin, and some regions of chromatin are stained dark because herein, chromatin is densely packed. Euchromatin is transcriptionally active chromatin and heterochromatin is inactive.
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise BIOLOGY (Theory)[SET-I][Comptt.] Section -D|1 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise BIOLOGY (Theory)[SET-I][Comptt.] Section -E|7 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise BIOLOGY (Theory)[SET-I][Comptt.] Section-B|6 Videos

  • SAMPLE PAPER 2019

    XII BOARDS PREVIOUS YEAR|Exercise Section E Part B|3 Videos

Similar Questions

Explore conceptually related problems

Why can some people not able to see in the dark ? Explain .

Why do people prefer to live in certain regions and not in others? Explain with example.

Read the following satements and select the correct option. Loosely packed and light stained region of chromation are called as heterochromatin. (ii) Densely packed and dark stained region of chromatin are called as euchromatin. (iii) A typical nucleosome contains 200 bp of DNA helix.

In the contact process for industrial manufacture of sulphuric acid, some amount of sulphuric acid is used a starting material. Explain briefly. What is the catalyst used in the oxidation of SO_2 ?

It was a bright, sunny day in the morning when the classes started in the school. Suddenly dark clouds appeared in the sky. Due to this the classroom became quite dark. The teacher asked a student to switch on all the lights in the classroom. (a) Why did the teacher ask for all the lights to be switched on ? (b) What was the size of the pupil of the eyes of the students : (i) before the clouds appeared ? (ii) when classroom became quite dark ? (iii) when the lights were switched on ? (c) In which of the above mentioned three situations, the students will feel glare in their eyes and why ? (d) What values are exhibited by the teacher in this case ?

Two bodies moving towards each other collide and move away in opposite directions. There is some rise of temperature of the bodies in the process. Explain the reason for the rise of temperature and state what type of collision is it.

A typical light dimmer used to dim the stage lights in a theater consists of a variable induction for L (where inductance is adjustable between zero and L_(max) ) conneced in series with a light bulb B as shown in fig. the mains electrical supply is 220 V at 50 Hz, the light bulb is rated at 220 V, 1100 W. What (L_(max)) is required if the rate of energy dissipated in the light blub is to be varied by a factor of 5 from its upper limits of 1100 W?