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
Describe the structure of a nucleosome.
In an octamer of the nucleosome, core DNA consists of ______ base pairs.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
AUG codon gives ________ & ________ amino acids in prokaryotes & Eukaryotes respectively.
Draw a neat and labelled diagram of the Nucleosome.
Write a note on the packaging of DNA in Eukaryotes.
The additional set of proteins required for packaging of chromatin at higher level are called ______.
The length of DNA segment having 44 base pairs is ______
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.
Name the linkage present between the nitrogen base and pentose sugar in DNA.
Which process occurs in the regulation of gene expression in prokaryotes but does not occur in the regulation of gene expression in eukaryotes?
Which one of the following statements about Histones is wrong?
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Distinguish between heterochromatin and euchromatin with reference to staining property and activity.
Who among the following has developed technique to synthesize artificial mRNA with known repeated sequences of two or three nucleotides?
Which of the following are core histones that form part of the histone octamer?
What is the role of histone H1 in eukaryotic chromatin?
What roles do HU proteins play in prokaryotic DNA organisation?
