Advertisements
Advertisements
प्रश्न
Differentiate between Euchromatin and Heterochromatin.
Advertisements
उत्तर
| Sr. no | Euchromatin | Heterchromatin |
| 1. | It is a loosely packed region of chromatin. | It is a densely packed region of DNA. |
| 2. | It stains light. | It stains dark. |
| 3. | Euchromatin is a transcriptionally active chromatin region. | Heterochromatin is a transcriptionally nearly dormant portion of the genome. |
संबंधित प्रश्न
Name the transcriptionally active region of chromatin in a nucleus.
The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is _______________.
Describe the structure of a nucleosome.
Although a prokaryotic cell has no defined nucleus, yet DNA is not scattered throughout the cell. Explain.
Explain the role of histones in forming a nucleosome.
Which of the following is the CORRECT statement with respect to formation of nucleosome?
Telomere has a unique property of __________.
The length of DNA segment having 44 base pairs is ______
Barr body in mammals represents ______.
Histone proteins are ______.
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called ______.
Read the following and answer from given below:
In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double-helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar, and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA, and D-DNA.
The double helix structure of DNA was proposed by ______
Read the following and answer from given below:
The process of copying genetic information from the template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.
Monocistronic structural genes are found in which organisms?
In the eukaryotic cell cycle, cell fusion experiments show that:
Which one of the following statements about Histones is wrong?
What is the function of histones in DNA packaging?
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Define the Transfection.
