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प्रश्न
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
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उत्तर
| Heterochromatin | Euchromatin |
| DNA is highly packed in the chromosome. | DNA is loosely packed in the chromosome. |
| It has a high density of DNA. | It has a low density of DNA. |
| It is only contained in Eukaryotes. | Prokaryotes and eukaryotes both contain euchromatin. |
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संबंधित प्रश्न
Name the transcriptionally active region of chromatin in a nucleus.
Although a prokaryotic cell has no defined nucleus, yet DNA is not scattered throughout the cell. Explain.
Very Short Answer Question:
Which are the nucleosomal 'core' histones?
Differentiate between Heterochromatin & Euchromatin.
Which one of the following histone molecule is NOT double in one nucleosome?
The length of DNA segment having 44 base pairs is ______
Nucleosome core is made of ______.
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called ______.
Which of the following is correct about mature RNA in eukaryotes?
A stretch of euchromatin has 200 nucleosomes. How many bp will there be in the stretch and what would be the length of the typical euchromatin?
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.
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 ______
Whittaker placed prokaryotes in:
In the eukaryotic cell cycle, cell fusion experiments show that:
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?
In an experiment, DNA is treated with a compound which tends to place itself amongst the stacks of nitrogenous base pairs. As a result of which, the distance between two consecutive base increases, from 0.34nm to 0.44 nm. Calculate the length of DNA double helix (which has 2 × 109 bp) in the presence of saturating amount of this compound.
Total ATP production during EMP pathway is ______.
Who among the following has developed technique to synthesize artificial mRNA with known repeated sequences of two or three nucleotides?
