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प्रश्न
The net electric charge on DNA and histones is ______.
पर्याय
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
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.
Explain the role of histones in forming a nucleosome.
In an octamer of the nucleosome, core DNA consists of ______ base pairs.
Very Short Answer Question:
Which are the nucleosomal 'core' histones?
Differentiate between Heterochromatin & Euchromatin.
Draw a neat and labelled diagram of the Nucleosome.
Which of the following is the CORRECT statement with respect to formation of nucleosome?
In prokaryotes, the enzyme RNA polymerase recognizes the promoter by its ______.
The octamer of histone protein is made of ______.
The length of DNA segment having 44 base pairs is ______
Barr body in mammals represents ______.
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 chain of B-DNA is coiled in a helical fashion. The spiral twisting of the B-DNA duplex produces ______
Which process occurs in the regulation of gene expression in prokaryotes but does not occur in the regulation of gene expression in eukaryotes?
During translation initiation in prokaryotes, a GTP molecule is needed in:
What is the function of histones in DNA packaging?
Name the enzymes involved in replacement of gaps during RNA processing in prokaryotes and eukaryotes.
Define the Transfection.
