Question

1. (4 points) Describe the following related to water. a. (1 pts) Describe one thing that is special about the bonds between oxygen and hydrogen in a water molecule that makes hydrogen-bonding possible. b. (3 pts) Describe why hydrogen-bonding in water important to life using at least three reasons or examples 2. (2 points) Circle the differences between DNA and RNA on both images. DNA Nitrogenous base (A, G, C, or T) RNA Nitrogenous base (A,G, C, or U) H H OPO OPO Thymine (T) Uracil (U) Phosphate group Phosphate group 0 # Sugar (ribose) Sugar (deoxyribose)

Answer 1

Answer for Hydrogen bonding in water emportant to life because ex water has a relatively high boiling point due to hydrogen bonds, without morogen bonds, water would boil at about - 800. That's why hydrogen bonds ensure the reduction of temperature extremes in large bodies of water, without hydrogen bonds water in because and take begin to rapidan boid One to rast decrease in boiling point - that could create a massive problem for life on earth. in the attraction created by hydrogen bonds Keeps water liquid over a wider range of temperature, wix the energy required to break multiple narozen bones causes water to have trish beat of vapourization that means a large amount of energy is needed to convert liquid water. Eva Hydrogen bonds hording water molecule together. ' at has great impact on solubility Que to this posar molecules are attreacted to ions and polar compounds making faren soluble in water. Answer ax The important thing that is special about the fonds between oxygen and Irydrogen in a water molecule that makes bydrogen bonding possible are - anprogen atours of one water molecule are altreacted towards the oxygen atom of neighbouring water molecure genereally approton shared tay two tone electron pairs. In a water molecute the oxygen nucleus with tf charges attracts electrous better than hydrogen nucleus with its tl charge.

The electron configuration of oxygen is 2,6(152 25, 20%) the electron configuration of Hydrogen is 1 (1st) so the nember of valence electron for oxygen is 2 because every element or molecure try to get a stable structure that's why oxygen need to follow duplet or octate rule for stability. 27 has more reliable to follow octate rule than Deplate rule. So it can find with two hydrogen atoms that share once electron, so two hydrogen atom trind with one oxygen atoms and can form (H2O) a water molecule. Hence the oxygen atom is partially negatively charged and the hydrogen is partially positively charged. The hydrogen bond on o-t.... may Envolve wide range of bonding energies Ch-120kgxmot-1) and o....o contants (0.238 to 0.300 mm). The hydrogenatours are not only covalently attached to their oxygen but also attracted to their oxygen atones. This attraction is the basis of hydrogen bonds. The attraction of the ort Bonding electrous towards the oxygen atone leaves a deficiency on the far side of the hydrogen atom relative to oxygen atour, the result is that the attractive force between the ort Indrogen and o-atou of nearby water molecule is strongest when three atoms are close to a straight line,

2. (2 points) Circle the differences between DNA and RNA on both images DNA Nitrogenous base RNA Nitrogenous base (A. G. C, or U) 0-P-o OP Thymine (T) Uracil (U) Phosphate group 0- Phosphate group Sugar (ribose) он Sugar (deoxyribose)