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What is solenoid model of DNA?

Important Questions on Molecular Basis of Inheritance

HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Describe the structure of a nucleosome with the help of a well-labelled diagram.
MEDIUM
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Length of the DNA with 23 base pairs is:
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Although a prokaryotic cell has no defined nucleus, yet DNA is not scattered throughout the cell. Explain.
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Explain the formation of a nucleosome.
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
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?
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
An octamer of 8 histones complexed with DNA forms
MEDIUM
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
What is the function of histones in DNA packaging? What is the net electric charge on histones?
MEDIUM
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
In the eukaryotes, the DNA molecules are organised within the nucleus. How is the DNA molecule organised in a bacterial cell in absence of a nucleus?
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
The packaging of chromatin at a higher level requires an additional set of proteins that collectively are referred to as
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Kappa particles are
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Histone proteins are
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Distinguish between heterochromatin and euchromatin. Which of the two is transcriptionally active?
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
The bacterial genome contains
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
The additional set of proteins require for packaging of chromatin at higher level are called
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging

Question Image

What is this diagram alongside representing?

EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Linker-DNA is attached to
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Read the following statements and select the correct option.
(i) Loosely packed and lightly stained region of chromatin are called as heterochromatin.
(ii) Densely packed and dark stained region of chromatin are called as euchromatin.
(iii) A typical nucleosome contains 200 bp of DNA helix.
HARD
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
 What are histones? What are their functions?
 
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
In prokaryotes, the genetic material is
EASY
Biology>Genetics and Evolution>Molecular Basis of Inheritance>Structure of DNA and DNA Packaging
Chromatin contains