The modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.
Polar covalent bonds hold the actual hydrogen and oxygen atoms within the molecule of water but if you meant what holds water together as a liquid then that is called hydrogenâ¦ bonding between molecules, a type of dipole interaction.
A...is held together by covalent bonds. water molecule: An example of a molecule held together by covalent bonds is ... . water: What does it mean to say a water molecule is âpolarâ? Draw a diagram of water to show the answer: Polar molecules have a positive region â in water it is the two hydrogen atoms. If the atoms in a water molecule are held together by covalent bonds, what type of bond holds multiple molecules together? Hydrogen bonds: How are hydrogen bonds and cohesion related? Hydrogen bonds keep water molecules packed tightly together. Cohesion is when two molecules of the same substance are attracted to each other and they stick together. What causes surface tension? Cohesion â the attraction of water molecules to each other. What is the opposite of cohesion?