What is the shape of a DNA molecule?

What is the shape of a DNA molecule?

• A. Linear chain
• B. Spiral
• C. Double helix
• D. Ring

Answer: (C)

The shape of a DNA molecule is best described as a double helix. This structure consists of two long strands that twist around each other, resembling a spiral staircase. Each strand is made up of a backbone formed by sugars and phosphate groups, with nitrogenous bases paired in the center, holding the two strands together through hydrogen bonds. The double helix configuration is crucial for the function of DNA, as it provides stability to the genetic information stored within. This structure allows the DNA to coil tightly, fitting efficiently within the cell nucleus while also enabling the strands to separate during the processes of replication and transcription, which are essential for cell division and protein synthesis.

The shape of a DNA molecule is best described as a double helix. This structure consists of two long strands that twist around each other, resembling a spiral staircase. Each strand is made up of a backbone formed by sugars and phosphate groups, with nitrogenous bases paired in the center, holding the two strands together through hydrogen bonds.

The double helix configuration is crucial for the function of DNA, as it provides stability to the genetic information stored within. This structure allows the DNA to coil tightly, fitting efficiently within the cell nucleus while also enabling the strands to separate during the processes of replication and transcription, which are essential for cell division and protein synthesis.