The structure of DNA as a double helix with complimentary strands was a major breakthrough in our understanding of biology. The major contributions to the discovery of the DNA double helix structure, (although not all were recognized by the Nobel prize Committee) were made by:

Erwin Chargaff and Franklin Rosalind

Explanation:

Erwin chargaff's work on base composition studies which involves the compilation of the four nitrogenous bases in the DNA double helix

Franklin Rosalind and Maurice studies on Xray diffraction images of DNA studies also assisted in the determination of the position and the distances.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.