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Phosphodiester bond is formed when exactly two hydroxyl groups in  react with a hydroxyl group on other molecules forming ester bonds. 

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Important Questions on Molecular Genetics

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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Manisha analyzed DNA molecule in the laboratory. Which of the following groups of elements will she find?
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Nuclear proteins associated with DNA molecule in eukaryotes are _______ and _______.
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
DNA fragments are
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Which of the following Nitrogen bases is found only in DNA ?
EASY
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Purines found both in DNA and RNA are
MEDIUM
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Choose the correct statement
I) Secondary metabolites do not have identifiable physiological processes in plants, fungal and microbial cells
II) Bio macromolecules are acid insoluble organic compounds with mol wt more than 10,000 daltons
III) Uridylic acid and cytidylic acids are derived from uracil and cytosine by esterification
IV) Lecithin and lectin are phospholipids found in cell membrane
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Histone proteins are found in chromosomes and are rich in I amino acids like II and III.
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
How many types of histone proteins take part in the composition of chromosome?
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Ratio of DNA:Histone is 1:1 in Eukaryotes. In Prokaryotes, it is:
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Which of the following is a pyrimidine base? 
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
A nucleotide consists of a sugar molecule, _____ group and a nitrogenous base.
EASY
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
The nitrogenous bases in DNA are
MEDIUM
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
The one which is not present in DNA is :
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
What does the given diagram represent?
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Which one of the following is a base analogue?
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
A nucleoside differs from a nucleotide as it lacks the
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
The 3′- carbon is linked with the 5′- carbon in the DNA and RNA via _____ bond.
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Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
____________ depends on continued DNA synthesis.
EASY
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
What do A and B represent in the given representation?

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MEDIUM
Biology>Genetics and Evolution>Molecular Genetics>Chemistry of Nucleic Acids
Choose the incorrect option w.r.t. deoxyribonucleoside triphosphate.