Which of the following is not relevant to the structure of double helical DNA?
Deoxyribose sugar
Nitrogenous bases
Hydrogen bonds
Ribose sugar
Related Questions
Chemical basis of heredity is?
DNA
RNA
Histones
None
Some region of chromatin are loosely packed and are referred to as?
Euchromatin
Heterochromatin
Both 1 and 2
None of these
All of the following are necessary characteristics of a molecule serving as genetic material EXCEPT its ability to:
Replicate accurately
Undergo mutations
Store information
Be transcribed or translated
Which of the following statements regarding histones is INCORRECT?
They are rich in basic amino acids like lysine and arginine.
They have a net positive charge at physiological pH.
Post-translational modifications of histones neutralize their positive charge.
They form the core of nucleosomes.
There is no DNA?
Mature RBC
Mature Spermatozoan
Hair root
An enucleated ovule
In the structure of polynucleotide chain, phosphoester linkage joins
Nitrogenous base of one nucleotide to pentose sugar of the next nucleotide
3' C of sugar of one nucleotide to 5' C of sugar of the next nucleotide
Phosphate group of one nucleotide to phosphate group of the next nucleotide
Nitrogenous base of one nucleotide to nitrogenous base of the next nucleotide
Which two purines are essential components of both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)?
Adenine and Guanine
Cytosine and Uracil
Thymine and Uracil
Adenine and Thymine
The number of in each turn of B-DNA helix is?
1
10
20
5
