Which one of the following statements is Correct?a)Naturally occuring ...
Because nucleic acids are polymer whose monomer is nucleotides not protein. So, (b) not correct.
Proteins are generally acts as enzyme but not vitamins. Proteins do not contain genetic information, its DNA which contain genetic information.
Correct option is (a)
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Which one of the following statements is Correct?a)Naturally occuring ...
Naturally occurring DNA has B-configuration
The correct statement among the given options is option 'A', which states that naturally occurring DNA has the B-configuration. This configuration refers to the spatial arrangement of the sugar-phosphate backbone and the nitrogenous bases in a DNA molecule.
Explanation:
DNA (deoxyribonucleic acid) is a macromolecule that carries the genetic information in all living organisms. It is composed of two strands of nucleotides that are held together by hydrogen bonds between complementary base pairs. The backbone of DNA is made up of sugar (deoxyribose) and phosphate molecules, while the nitrogenous bases (adenine, thymine, cytosine, and guanine) are connected to the sugar molecules.
B-configuration:
The B-configuration is one of the three predominant conformations that DNA can adopt. It is the most common form found in nature and is characterized by a right-handed helix with a twist of approximately 36 degrees per base pair. In the B-configuration, the sugar-phosphate backbone is on the outside of the helix, while the nitrogenous bases are stacked on the inside.
Other DNA configurations:
1. A-configuration: The A-configuration is a right-handed helix with a shallower and wider minor groove compared to the B-configuration. It is observed in certain forms of RNA and DNA-RNA hybrids.
2. Z-configuration: The Z-configuration is a left-handed helix with a zig-zag pattern. It is less common and is found under certain conditions, such as high salt concentrations or alternating purine-pyrimidine sequences.
Importance of B-configuration:
The B-configuration is important for the stability and function of DNA. It allows for efficient base pairing between the complementary strands, which is essential for DNA replication and gene expression. The specific arrangement of the bases in the B-configuration also plays a role in the recognition and binding of DNA by proteins involved in processes such as transcription and DNA repair.
Conclusion:
In summary, the statement that naturally occurring DNA has the B-configuration is correct. The B-configuration is the most common and stable conformation of DNA, allowing for efficient base pairing and proper functioning of the genetic material.