Draw the hydrogen bonds between the bases. The letter R represents the rest of the nucleotide. The bases are positioned approximately as they would be in a DNA double helix. To indicate a hydrogen bond, simply draw a regular single bond between the atoms. Be careful not to modify the existing atoms or bonds in any way, nor add extraneous atoms or bonds. Draw the hydrogen bond(s) between thymine and adenine. Draw the hydrogen bond(s) between guanine and cytosine.

Adenine pairs with Thymine through two hydrogen bonds. Guanine pairs with Cytosine through three hydrogen bonds.

----------------------

Nucleic acids are composed of Nitrogenated bases.  

In the DNA molecule,

Two hydrogen bonds join the A-T pair, and three hydrogen bonds join the G-C.

Hydrogen forms bridges with nitrogen and with oxygen.  

You will find the image in the attached files

---------------------------------------

Related link: link

                    link

                      link

Explanation:

The bond between adenine and thumb is a double bond while that between guanine and cytosine is triple bond.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave