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प्रश्न
The net electric charge on DNA and histones is ______.
विकल्प
negative and positive, respectively
both negative
both positive
zero
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उत्तर
The net electric charge on DNA and histones is negative and positive, respectively.
Explanation:
On DNA and histones, the net electric charge is both negative and positive. The presence of phosphate ions in the nucleotides makes the DNA molecule negatively charged. Because lysine and arginine amino acid residues are present, his tones are positively charged.
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संबंधित प्रश्न
Describe the structure of a nucleosome.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Write a note on the packaging of DNA in Eukaryotes.
Which of the following is the CORRECT statement with respect to formation of nucleosome?
The additional set of proteins required for packaging of chromatin at higher level are called ______.
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 ______
Histones are rich in ______.
Whittaker placed prokaryotes in:
Part of chromatins which is densely packed stain darkly and is transcriptionally inactive is called ______.
Nucleosomes are the repeating units of chromatin the part between adjacent nucleosomes is called ______ .
Who among the following has developed technique to synthesize artificial mRNA with known repeated sequences of two or three nucleotides?
Histones are best characterised as:
The human genome contains approximately how many base pairs per diploid cell?
In prokaryotic DNA compaction, the looping step creates how many loop domains?
What is the typical range for linker DNA length between nucleosomes?
What is the total DNA content per nucleosome?
Describe the hierarchical levels of eukaryotic DNA packaging.
What is the charge characteristic of DNA packaging proteins in both prokaryotes and eukaryotes?
