Chemistry of Nucleic Acids
Chemistry of Nucleic Acids: Overview
This Topic covers sub-topics such as Nucleotides, Purines, Histones, Nucleoside, Pyrimidines, Chemical Composition of DNA, Pentose Sugar in DNA and, Phosphate Functional Group
Important Questions on Chemistry of Nucleic Acids
Draw the diagram of phosphodiester bond in a DNA.
The 3′- carbon is linked with the 5′- carbon in the DNA and RNA via _____ bond.
Phosphodiester bond is formed when exactly two hydroxyl groups in _____ react with a hydroxyl group on other molecules forming ester bonds.
Write a short note about the backbone of the strands of nucleic acid.
Nuclear proteins associated with DNA molecule in eukaryotes are _______ and _______.
The structures of chloroxylenol and adenine are:
In eukaryotes, _____proteins are required for the packaging of DNA.
Nucleoside is a nucleotide without _____.
Among the four nitrogenous bases of DNA, which nitrogenous base is not found in RNA?
A nucleotide consists of a sugar molecule, _____ group and a nitrogenous base.
The nucleotides present in the RNA molecules includes the uracil and adenine nitrogen bases.
Choose the correct combination
| List - I | List - II | List-III |
| A) Radial spikes | i) Sealing of DNA | I) Axoneme |
| B) Histone | ii) Positive charge histone | II) Lies outside of core |
| C) Negatively charged DNA | iii) Linkers | III) DNA package |
| iv) No membrane | IV) r-RNA synthesis |
The correct answer is
Nucleotides are made up of a hexose sugar, nitrogenous base and a phosphate group.
Which of the following is a pyrimidine base?
Select the incorrectly matched pairs.
Which of the following proteins helps in holding DNA together in eukaryotes?
Which of the following is not a part of a nucleotide?
____________ depends on continued DNA synthesis.
How many types of histone proteins take part in the composition of chromosome?
