Advertisements
Advertisements
प्रश्न
What would happen if histones were to be mutated and made rich in acidic amino acids such as aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?
Advertisements
उत्तर
If histone proteins were rich in acidic amino acids instead of basic amino acids then they may not have any role in DNA packaging in eukaryotes as DNA is also negatively charged molecule. The packaging of DNA around the nucleosome would not happen. Consequently, the chromatin fibre would not be formed.
APPEARS IN
संबंधित प्रश्न
How are the following formed and involved in DNA packaging in a nucleus of a cell?
(ii) Nucleosome
(iii) Chromatin
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 _______________.
Explain the role of histones in forming a nucleosome.
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Very Short Answer Question:
Which are the nucleosomal 'core' histones?
The length of DNA can be calculated by ______.
Which one of the following histone molecule is NOT double in one nucleosome?
Telomere has a unique property 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?
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 chain of B-DNA is coiled in a helical fashion. The spiral twisting of the B-DNA duplex produces ______
Flagella are present both in prokaryotic and eukaryotic cells, however, they differ in:
Which one of the following cell organelle is considered as ‘Cell within a cell’?
Electron Transport System (ETS) is present in a eukaryotic cell in the:
Watson and Crick proposed the 'Double Helix' structure of DNA based on data produced by ______
______ are the amino acids of histones.
Distinguish between heterochromatin and euchromatin with reference to staining property and activity.
In a mature, functional mRNA of eukaryotes______.
