Afew key experiments to discover the structure of the dna molecule. who was responsible for the research suggesting that dna had a helical structure with a relatively uniform diameter and was probably too wide to be a single-stranded helix?

Dr. James Watson and Francis Crick

Explanation:

It was Dr. Rosalinda Franklin who first take a picture of DNA in its helical structure. Using this picture of Dr Franklin, Dr. James Watson and Francis Crick recognized from the image and suggested that the DNA has a double helix structure. They assemble a model of the DNA structure and wrote a paper describing the DNA as a double helix.

its d lol

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an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme